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Murase M, Fujita H, Oki M, Yoshioka F, Nishiyama Y, Ohyama T, Matsumoto C, Usui S, Sato Y, Sado T, Takahashi H, Sasaki K, Matsuyama M, Sumita Y. Time-study research on maxillofacial prosthetic treatment. Jpn Dent Sci Rev 2024; 60:73-80. [PMID: 38298267 PMCID: PMC10828541 DOI: 10.1016/j.jdsr.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 12/11/2023] [Accepted: 12/26/2023] [Indexed: 02/02/2024] Open
Abstract
Unreasonable medical fees can cause problems such as increased medical costs, greater medical disparities, decreased medical standards, and physician shortages. To prevent such problems, it is important to set appropriate medical fees, ensure their proper use, and improve the efficiency of medical care. The treatment of patients with maxillofacial defects is generally more expensive compared with general prosthodontic treatment because it involves more materials and requires more frequently follow-ups for longer period. However, the actual time required for maxillofacial prosthetic treatment is unclear. Therefore, in this study, we aimed to clarify the amount of time spent treating maxillofacial prosthetic patients. We analyzed clinical data from patients undergoing routine maxillofacial prosthetic treatment, irrespective of difficulty level, at 8 university hospitals and 2 dental clinics. We also collected data from maxillofacial prosthodontists on the treatment time required for various Japanese health insurance items, including the fabrication of maxillofacial prostheses. The results revealed that some aspects of maxillofacial prosthetic treatment may take longer to perform and are more costly to perform than previously thought, suggesting the need for some adjustments to the health insurance reimbursement system. Maintaining an appropriate balance between expenditures and fees will greatly benefit patients and physicians, ensuring positive health outcomes and a healthy society.
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Affiliation(s)
- Mai Murase
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Haruka Fujita
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Meiko Oki
- Department of Basic Oral Health Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Fumi Yoshioka
- Department of Removable Prosthodontics, School of Dentistry, Aichi Gakuin University, Aichi, Japan
| | - Yuichiro Nishiyama
- Tsurumi University, School of Dental Medicine, Department of Oral Rehabilitation and Prosthodontics Yokohama, Japan
| | - Tetsuo Ohyama
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - Chihaya Matsumoto
- Department of Prosthetic Dentistry, School of Dentistry, Ohu University, Koriyama, Japan
| | | | - Yuji Sato
- Sato Dental Clinic, Hiroshima, Japan
| | | | - Hidekazu Takahashi
- Oral Biomedical Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | | | - Miwa Matsuyama
- Department of Oral Health Care and Rehabilitation, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Yuka Sumita
- Division of General Dentistry 4, The Nippon Dental University Hospital, Tokyo, Japan
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Qi J, Miyashita M, Ogawa T, Naito H, Sasaki K. Resonance frequency analysis for evaluation of the connecting condition between fixed prostheses and their abutment teeth: An in vitro and finite element analysis study. J Prosthet Dent 2024; 131:886-894. [PMID: 35491260 DOI: 10.1016/j.prosdent.2022.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 11/26/2022]
Abstract
STATEMENT OF PROBLEM Loss of retention is a clinical complication for fixed partial dentures (FPDs). However, a method sensitive enough to measure the early retention loss of FPDs is lacking. PURPOSE The purpose of this in vitro and finite element analysis (FEA) study was to determine whether resonance frequency analysis (RFA) with a newly developed system can detect lack of FPD retention caused by cement loss. MATERIALS AND METHODS Two evaluation methods were used: RFA of an in vitro model of a 3-unit FPD from the second premolar to the second molar and FEA by using a simplified model. The in vitro model was used to evaluate 4 connecting conditions: both crowns cemented, only the premolar crown cemented, only the molar crown cemented, and both crowns uncemented. Tapping stimulation (16 impulsive forces, 4 Hz) was directly applied to the buccal side of the second molar or the second premolar, and an attached 3D accelerometer sensor was used to record the resonance frequency (RF) of the tapped tooth. The amplitude, frequency, Q-value, and total area under the curve (AUC) of the RF values in the buccolingual direction were compared between connecting conditions. The FEA was done by using a simplified model of a 3-unit FPD with similar connecting conditions as the in vitro model study, and the RF amplitude and frequency of each tooth were calculated. Statistical evaluation included 1-way analysis of variance and the Tukey HSD test to compare the differences among each connecting condition under each parameter for measurement sites on the molar and the premolar, respectively (α=.05). RESULTS For both the molar and premolar measurements in both the in vitro and FEA models, when the measurement site was on the uncemented tooth, the amplitude of RF-1 increased, the Q-value of RF-2 decreased, and the area under the curve increased (P<.05). CONCLUSIONS The same 3 trends found between the measurement sites of the in vitro study and FEA indicated that RFA may be useful for detecting an FPD with loosening caused by cement loss, even partial cement loss.
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Affiliation(s)
- Jingyu Qi
- Graduate student, Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Makiko Miyashita
- Assistant Professor, Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Toru Ogawa
- Associate Professor, Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.
| | - Hideki Naito
- Associate Professor, Department of Civil and Environmental Engineering, Tohoku University Graduate School of Engineering, Sendai, Japan
| | - Keiichi Sasaki
- Professor, Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Sammour SR, Naito H, Kimoto T, Sasaki K, Ogawa T. Anomaly detection of retention loss in fixed partial dentures using resonance frequency analysis and machine learning: An in vitro study. J Prosthodont Res 2024:JPR_D_23_00154. [PMID: 38383001 DOI: 10.2186/jpr.jpr_d_23_00154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
PURPOSE This study aimed to determine the usefulness of machine learning techniques, specifically supervised and unsupervised learning, for assessing the cementation condition between a fixed partial denture (FPD) and its abutment using a resonance frequency analysis (RFA) system. METHODS An in vitro mandibular model was used with a single crown and three-unit bridge made of a high-gold alloy. Two cementation conditions for the single crown and its abutment were set: cemented and uncemented. Four cementation conditions were set for the bridge and abutments: both crowns were firmly cemented, only the premolar crown was cemented, only the molar crown was cemented, and both crowns were uncemented. For RFA under cementation conditions, 16 impulsive forces were directly applied to the buccal side of the tested tooth at a frequency of 4 Hz using a Periotest device. Frequency responses were measured using a 3D accelerometer mounted on the occlusal surface of the tested tooth. Both supervised and unsupervised learning methods were used to analyze the datasets. RESULTS Using supervised learning, the fully cemented condition had the highest feature importance scores at approximately 3000 Hz; the partially cemented condition had the highest scores between 1000 and 2000 Hz; and the highest scores for the uncemented condition were observed between 0 and 500 Hz. Using unsupervised learning, the uncemented and partially cemented conditions exhibited the highest anomaly scores. CONCLUSIONS Machine learning combined with RFA exhibits good potential to assess the cementation condition of an FPD and hence facilitate the early diagnosis of FPD retention loss.
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Affiliation(s)
- Sara Reda Sammour
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Prosthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
| | - Hideki Naito
- Department of Civil and Environmental Engineering, Tohoku University Graduate School of Engineering, Sendai, Japan
| | - Tomoyuki Kimoto
- Department of Electrical and Electronic Engineering, National Institute of Technology, Oita College, Oita, Japan
| | - Keiichi Sasaki
- Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Chiba T, Izumita K, Koyama S, Sato N, Tagaino R, Hatakeyama T, Sasaki K. Effects of maxillofacial prosthetic treatment on oral health-related quality of life and masticatory ability of patients with head and neck tumors. J Oral Sci 2024; 66:30-36. [PMID: 38030286 DOI: 10.2334/josnusd.23-0162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
PURPOSE Using multivariate analysis, this study investigated the effectiveness of maxillofacial prosthetic treatment in relation to oral health-related quality of life (OHR-QoL), masticatory ability (food intake status score and gum-jelly test score) and related factors in patients who had undergone surgery for head and neck tumors. METHODS The study cohort comprised 112 patients who underwent surgical resection and prosthetic treatment among 224 patients with head and neck tumors seen at the Maxillofacial Prosthetics Clinic of Tohoku University Hospital in a 2-year period. Correlations between OHR-QoL, food intake status score, and gum-jelly test score (criterion variables), and age, sex, maxillary defect, tongue/soft tissue defect, reconstructive surgery, and chemoradiotherapy (explanatory variables) were investigated, and the data were examined statistically. RESULTS Maxillary defect, tongue and soft palate tissue defect, and chemoradiotherapy were identified as factors that hindered the effectiveness of maxillofacial prosthetic treatment for improvement of the OHR-QoL, food intake status score, and gum-jelly test score. On the other hand, reconstructive surgery was a factor that facilitated the improvement of OHR-QoL and masticatory ability with maxillofacial prosthetic treatment. CONCLUSION The factors identified to be related to the success or failure of maxillofacial prosthetic treatment suggest the importance of combining prosthetic intervention with surgical reconstruction.
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Affiliation(s)
- Takahiro Chiba
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | | | - Shigeto Koyama
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital
| | - Naoko Sato
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital
| | - Ryo Tagaino
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital
| | | | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
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Hihara H, Izumita K, Kawata T, Akatsuka R, Tagaino R, Kitaoka A, Kayaba C, Ikeda K, Sasaki K. Correction: A novel treatment based on powder jet deposition technique for dentin hypersensitivity: a randomized controlled trial. BMC Oral Health 2023; 23:941. [PMID: 38017452 PMCID: PMC10683154 DOI: 10.1186/s12903-023-03664-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/13/2023] [Indexed: 11/30/2023] Open
Affiliation(s)
- Hiroki Hihara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate, School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
| | - Kuniyuki Izumita
- Perioperative Oral Care Support, Tohoku University Hospital, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Tetsuo Kawata
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate, School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
- Otemachi Kawata Dental Clinic, 6-19 Otemachi, Aoba-ku, Sendai, Miyagi, 980-0805, Japan
| | - Ryo Akatsuka
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate, School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
- Akatsuka Dental Clinic, 2838-1 Mawatari, Hitachinaka, Ibaraki, 312-0012, Japan
| | - Ryo Tagaino
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aobaku, Sendai, Miyagi, 980-8575, Japan
| | - Aki Kitaoka
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate, School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Chie Kayaba
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Koji Ikeda
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Keiichi Sasaki
- Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
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Schrank BR, Manzar GS, Wu SY, Gunther JR, Fang P, Jabbour EJ, Lim TY, Daver NG, Cykowski MD, Fuller GN, Cachia D, Kamiya-Matsuoka C, Woodman KH, DiNardo CD, Jain N, Short NJ, Sasaki K, Dabaja B, Kantarjian HM, Pinnix CC. Dorsal Column Myelopathy Following Intrathecal Chemotherapy for Leukemia. Int J Radiat Oncol Biol Phys 2023; 117:e486-e487. [PMID: 37785537 DOI: 10.1016/j.ijrobp.2023.06.1715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Intrathecal (IT) methotrexate (Mtx) and/or cytarabine (AraC) improve CNS disease control in patients (pts) with hematologic malignancies. There are increasing number of case reports of irreversible, primarily dorsal column myelopathy in pts treated with IT chemotherapy. By describing the largest case series of myelopathy following IT chemotherapy, we aim to raise awareness about this devastating albeit rare complication. MATERIALS/METHODS We retrospectively reviewed 25 pts with leukemia who developed paraplegia following IT chemotherapy between 2/2006 and 9/2021. Clinical/treatment characteristics, response, and toxicity were extracted from the medical records. RESULTS Seventeen pts (68%) were male, 16 had B-cell ALL (64%), 4 had AML (16%), 2 had CML (8%), 2 had T-ALL (8%), and 1 had BPDCN (4%). The median age at diagnosis was 38 years (IQR 30-59). All pts required systemic salvage treatment after induction chemotherapy with a median number of 3 regimens received (IQR 2-5.5). In total, the median number of IT treatments was 19 per pt (IQR 14-27). Most pts (84%, n = 21) received single agent IT Mtx alternating with single agent AraC. Fifteen pts (60%) received triple IT therapy with a median of 3 treatments (IQR 0-8). Prior to the onset of myelopathy, 10 pts (40%) received allogeneic SCT and 9 pts (36%) were treated with radiation therapy. Median follow-up from diagnosis was 1.9 yrs (IQR 1.3-4.1). Myelopathy was progressive and irreversible in all pts (n = 25); 84% (n = 21) experienced sensory loss, and all pts had extremity weakness. Symptoms were ascending in 11 pts (44%) and descending in 4 pts (16%). Irreversible bowel/bladder incontinence developed in 12 pts (48%). CSF analysis at the time of symptom onset was negative for leukemia cells in most pts (n = 21, 84%) and showed malignant cells in 4 pts (16%). CSF studies showed elevated protein in 21 pts (84%). Myelin basic protein was elevated in all 13 assessed pts. On T2 weighted spinal MRI, all pts had enhancement of the dorsal columns, including 80% of pts with this dorsal column abnormality reported at the time of the study and 20% of pts (n = 5) with the dorsal enhancement noted retrospectively. Due to concern for occult disease, 20 pts (80%) received additional CNS-directed therapy after symptom onset. Twenty-two pts (88%) died at last follow-up. The time between neurological symptom onset and death was a median 3.5 months (IQR 2.6 and 5). Three pts (12%) are alive with paraplegia at a median of 4.4 years from symptom onset. CONCLUSION Dorsal column myelopathy is a rare but devastating condition that can occur after IT chemotherapy in heavily pre-treated leukemia pts. T2 weighted spinal MRI can be helpful in the evaluation of pts that present with unexplained weakness and sensory changes. We recommend delaying additional CNS-directed therapy until work-up to rule out alternative etiologies is complete. Future strategies are desperately needed to address this irreversible treatment complication.
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Affiliation(s)
- B R Schrank
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - G S Manzar
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - S Y Wu
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - J R Gunther
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - P Fang
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - E J Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - T Y Lim
- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - N G Daver
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - M D Cykowski
- Department of Pathology and Genomic Medicine, Houston Methodist, Houston, TX
| | - G N Fuller
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - D Cachia
- Department of Neurology, UMass Memorial Health, Worcester, MA
| | - C Kamiya-Matsuoka
- Department of Neuro-Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - K H Woodman
- Department of Neuro-Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - C D DiNardo
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - N Jain
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - N J Short
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - K Sasaki
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - B Dabaja
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - H M Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - C C Pinnix
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
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Poovarodom P, Rungsiyakull C, Suriyawanakul J, Li Q, Sasaki K, Yoda N, Rungsiyakull P. Effect of customized abutment taper configuration on bone remodeling and peri-implant tissue around implant-supported single crown: A 3D nonlinear finite element study. J Prosthodont 2023. [PMID: 37767904 DOI: 10.1111/jopr.13776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 08/24/2023] [Accepted: 09/23/2023] [Indexed: 09/29/2023] Open
Abstract
PURPOSE The optimal configuration of a customized implant abutment plays a crucial role in promoting bone remodeling and maintaining the peri-implant gingival contour. However, the biomechanical effects of abutment configuration on bone remodeling and peri-implant tissue remain unclear. This study aimed to evaluate the influence of abutment taper configurations on bone remodeling and peri-implant tissue. MATERIALS AND METHODS Five models with different abutment taper configurations (10°, 20°, 30°, 40°, and 50°) were analyzed using finite element analysis (FEA) to evaluate the biomechanical responses in peri-implant bone and the hydrostatic pressure in peri-implant tissue. RESULTS The results demonstrated that the rate of increase in bone density was similar in all models. On the other hand, the hydrostatic pressure in peri-implant gingiva revealed significantly different results. Model 10° showed the highest maximum and volume-averaged hydrostatic pressures (69.31 and 4.5 mmHg), whereas Model 30° demonstrated the lowest values (57.83 and 3.88 mmHg) with the lowest excessive pressure area. The area of excessive hydrostatic pressure decreased in all models as the degree of abutment taper increased from 10° to 30°. In contrast, Models 40° and 50° exhibited greater hydrostatic pressure concentration at the cervical region. CONCLUSION In conclusion, the abutment taper configuration had a slight effect on bone remodeling but exerted a significant effect on the peri-implant gingiva above the implant platform via hydrostatic pressure. Significant decreases in greatest and average hydrostatic pressures were observed in the peri-implant tissues of Model 30°. However, the results indicate that implant abutment tapering wider than 40° could result in a larger area of excessive hydrostatic pressure in peri-implant tissue, which could induce gingival recession.
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Affiliation(s)
- Pongsakorn Poovarodom
- Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Chaiy Rungsiyakull
- Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Muang, Chiang Mai, Thailand
| | - Jarupol Suriyawanakul
- Faculty of Engineering, Department of Mechanical Engineering, Khon Kaen University, Nai Mueang, Thailand
| | - Qing Li
- Faculty of Engineering, School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, Australia
| | - Keiichi Sasaki
- Miyagi University, Taiwa, Japan
- Graduate School of Dentistry, Division of Prosthetic Dentistry, Tohoku University, Sendai, Japan
| | - Nobuhiro Yoda
- Graduate School of Dentistry, Division of Prosthetic Dentistry, Tohoku University, Sendai, Japan
| | - Pimduen Rungsiyakull
- Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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Hihara H, Izumita K, Kawata T, Akatsuka R, Tagaino R, Kitaoka A, Kayaba C, Ikeda K, Sasaki K. A novel treatment based on powder jet deposition technique for dentin hypersensitivity: a randomized controlled trial. BMC Oral Health 2023; 23:695. [PMID: 37759198 PMCID: PMC10537872 DOI: 10.1186/s12903-023-03431-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 09/20/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND This study aimed to evaluate the efficacy and safety of dentin hypersensitivity (DH) treatment using a newly developed device based on a powder jet deposition (PJD) technique that creates a hydroxyapatite (HAP) layer on the dentin surface, thereby alleviating the hypersensitivity. The effect of the PJD treatment was compared with that of conventional treatment using Teethmate Desensitizer (TMD; calcium-phosphate containing material with TTCP (Ca4(PO4)2O) and DCPA (CaHPO4)), which has been used clinically in Japan with well-confirmed effectiveness. MATERIALS AND METHODS A randomized controlled trial was conducted including 35 patients who had symptoms of DH in two or more quadrants. Two test teeth were selected per patient (70 teeth in total) and randomly assigned to PJD or TMD treatment. The efficacy was evaluated using the improvement rate for air and scratch pain according to the scores obtained via visual analog scale 12 weeks after treatment. The safety assessment was performed focusing on gingival index (GI) and spontaneous pain. The t-test was used to analyze the non-inferiority of PJD treatment compared to TMD treatment. RESULTS The improvement rate of air pain was 69.0% for PJD and 69.7% for TMD. The improvement rate of scratch pain was 80.8% for PJD and 81.7% for TMD. Non-inferiority with a margin of 10% was not observed for both air and scratch pain. No change was observed in GI from baseline and the improvement rate of spontaneous pain for PJD was higher than that for TMD. CONCLUSION Non-inferiority of PJD to TMD treatment was not observed in this study; however, it was not statistically demonstrated, and the results were thus interpreted as inconclusive. PJD did improve the DH symptoms, as did TMD. PJD's therapeutic effect was most likely attributable to the deposition of a HAP layer on the tooth surface, which would alleviate hypersensitivity for at least 12 weeks without causing severe adverse events. TRIAL REGISTRATION UMIN-CTR. ID: UMIN000025022. date: 02/12/2016.
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Affiliation(s)
- Hiroki Hihara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
| | - Kuniyuki Izumita
- Perioperative Oral Care Support, Tohoku University Hospital, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Tetsuo Kawata
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
- Otemachi Kawata Dental Clinic, 6-19 Otemachi, Aoba-ku, Sendai, Miyagi, 980-0805, Japan
| | - Ryo Akatsuka
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
- Akatsuka Dental Clinic, 2838-1 Mawatari, Hitachinaka, Ibaraki, 312-0012, Japan
| | - Ryo Tagaino
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aobaku, Sendai, Miyagi, 980-8575, Japan
| | - Aki Kitaoka
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo- machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Chie Kayaba
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Koji Ikeda
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Keiichi Sasaki
- Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
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Saito N, Ogawa T, Shiraishi N, Koide R, Komine H, Yokoyama M, Hanawa S, Sasaki K. Difference in the Electromyographic Behavior of the Masticatory and Swallowing Muscles During Cued Versus Spontaneous Swallowing. Dysphagia 2023:10.1007/s00455-023-10621-x. [PMID: 37752277 DOI: 10.1007/s00455-023-10621-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 09/10/2023] [Indexed: 09/28/2023]
Abstract
The risk of dysphagia and/or aspiration is determined using screening tests, such as the repeated saliva swallowing test and modified water swallowing test, which evaluate cued swallowing. However, humans masticate and swallow foods with various consistencies, forms, and amounts, without conscious awareness. Therefore, this study aimed to examine the difference in the behavior of masticatory and swallowing muscles during spontaneous versus cued swallowing through a series of mastication and swallowing processes by evaluating surface electromyogram (sEMG) signals. The effect of the consistency and amount of food on the behavior of these muscles was also investigated. The sEMG recordings of the masseter muscles and anterior belly of the digastric muscle for 12 subjects, and genioglossus muscle for 5 subjects were obtained. The genioglossus activity was recorded using custom-made ball electrodes. The test foods were cookies and tofu, in amounts of 2 g and 4 g. The normalized muscle activity (integrated EMG), duration of the muscle activity, initial activation timepoint of each muscle, and total duration of swallowing were compared among four conditions. The activity of each muscle was significantly higher during the swallowing of cookies than tofu, for 4 g vs 2 g, and for cued versus spontaneous swallowing. The duration of each muscle activity, initial activation timepoint, and total duration of swallowing were significantly longer for cookies versus tofu, for 4 g vs 2 g, and for spontaneous versus cued swallowing. These results suggest that the behavior of the masticatory and swallowing muscles is affected by cued swallowing and by the consistency and amount of food.
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Affiliation(s)
- Naoya Saito
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
| | - Naru Shiraishi
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Rie Koide
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Hideya Komine
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Masayoshi Yokoyama
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Soshi Hanawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
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10
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Ichikawa H, Yoda N, Ogawa T, Iwamoto M, Kawata T, Egusa H, Sasaki K. Impact of implant location on load distribution of implant-assisted removable partial dentures: a review of in vitro model and finite-element analysis studies. Int J Implant Dent 2023; 9:31. [PMID: 37725286 PMCID: PMC10509086 DOI: 10.1186/s40729-023-00500-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 09/06/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Appropriate load distribution among the supporting elements is essential for the long-term success of implant-assisted removable partial dentures; however, there is little information available on load distribution. PURPOSE This study aimed to evaluate the effect of implant location on load distribution in implant-assisted removable partial dentures by reviewing in vitro models and finite-element analysis studies. MATERIALS AND METHODS English-language studies which examined the load distribution of implant-assisted removable partial dentures and were published between January 2001 and October 2022 were extracted from PubMed, ScienceDirect, and Scopus online databases, and manual searching. Two reviewers selected the articles based on the predetermined inclusion and exclusion criteria, followed by data extraction and analysis. RESULTS Forty-seven studies were selected after evaluating the titles and abstracts of 264 articles; two were identified manually. After screening the text, 12 studies were included: six in vitro model experiments and six finite-element analysis studies. All included studies used a mandibular free-end missing model (Kennedy Class I or II). The influence of implant location on load distribution to the abutment tooth, implant, and mucosa under the denture base was summarized in three cases: implant at the premolar, first molar, and second molar region. Due to differences in the measurement method of load distribution and loading condition to the denture, the results differed among the studies. CONCLUSIONS The implant location in implant-assisted removable partial dentures can affect load distribution to the supporting elements, such as the abutment tooth, implant, and mucosa under the denture base.
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Affiliation(s)
- Hiromi Ichikawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-Machi, Sendai, Miyagi, 980-8575, Japan
- Dental Technical Training School attached to Nihon University School of Dentistry, Tokyo, Japan
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-Machi, Sendai, Miyagi, 980-8575, Japan.
- Department of Prosthodontics, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia.
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-Machi, Sendai, Miyagi, 980-8575, Japan
| | - Maya Iwamoto
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-Machi, Sendai, Miyagi, 980-8575, Japan
| | - Tetsuo Kawata
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-Machi, Sendai, Miyagi, 980-8575, Japan
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, 980-8575, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-Machi, Sendai, Miyagi, 980-8575, Japan
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11
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Mitsuyasu Y, Oka T, Takahashi A, Kino Y, Okutsu K, Sekine T, Yamashita T, Shimizu Y, Chiba M, Suzuki T, Osaka K, Sasaki K, Suzuki M, Fukumoto M, Shinoda H. Estimation of external dose for wild Japanese macaques captured in Fukushima prefecture: decomposition of electron spin resonance spectrum. Radiat Prot Dosimetry 2023; 199:1620-1625. [PMID: 37721074 DOI: 10.1093/rpd/ncad146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 03/28/2023] [Accepted: 04/05/2023] [Indexed: 09/19/2023]
Abstract
The signal intensities of CO2- radicals in teeth can be utilised as an individual indicator of the cumulative external dose for animals. To accurately determine the external dose, it is desirable to analyse the CO2- radical intensity and improve its detection limit. We recently reported a dose-response in the range of 0-200 mGy and estimated the absorbed dose for seven wild Japanese macaques captured in/around the related areas to the Fukushima Daiichi Nuclear Power Plant accident. Herein, for further improvement of this method, we examined the electron spin resonance spectra of the teeth of these seven and an additional four macaques captured in Fukushima by applying two spectrum-decomposition algorithms.
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Affiliation(s)
- Yusuke Mitsuyasu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Toshitaka Oka
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Atsushi Takahashi
- Tohoku University Hospital, Tohoku University, Sendai, Miyagi 980-8574, Japan
| | - Yasushi Kino
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Kenichi Okutsu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Tsutomu Sekine
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Takuma Yamashita
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
- Institute for Excellence in Higher Education, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Yoshinaka Shimizu
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Mirei Chiba
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Toshihiko Suzuki
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Ken Osaka
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Keiichi Sasaki
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Masatoshi Suzuki
- International Research Institute of Disaster Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
| | - Manabu Fukumoto
- International Research Institute of Disaster Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
- Center for Advanced Intelligence Project, RIKEN, Nihonbashi, Tokyo 103-0027, Japan
| | - Hisashi Shinoda
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
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12
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Shimane T, Koike K, Fujita S, Kurita H, Isomura ET, Chikazu D, Kanno N, Sasaki K, Hino S, Hibi H, Koyama T, Nakamura S, Nomura T, Mori Y, Tojyo I, Yamamoto T, Yamamori I, Aota K, Tanzawa H. Positive impact of perioperative oral management on the risk of surgical site infections after abdominal surgery: Sixteen universities in Japan. Medicine (Baltimore) 2023; 102:e35066. [PMID: 37713859 PMCID: PMC10508462 DOI: 10.1097/md.0000000000035066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/14/2023] [Indexed: 09/17/2023] Open
Abstract
Surgical site infections (SSI) are associated with increased morbidity and mortality rates. This study aimed to investigate the ability of perioperative oral management (POM) to reduce the risk of SSI in abdominal surgery Real-world data collected from 16 university hospitals in Japan were reviewed. The medical records of consecutive 2782 patients (1750 men and 1032 women) who underwent abdominal surgery under general anesthesia at 16 university hospitals were retrospectively reviewed. Detailed information about SSI was assessed and compared between patients with and without POM in univariate and multivariate analyses. SSI were observed in 275 patients (incidence rate:9.9%), and POM was administered to 778 patients (28.0%). Univariate analyses revealed that diabetes mellitus, Eastern Cooperative Oncology Group performance status, American Society of Anesthesiologists classification, surgical site, preoperative Prognostic Nutritional Index score, POM, extent of surgery, operation time, and intraoperative blood loss were significantly associated with postoperative SSI (Chi-square or Mann-Whitney U test, P < .01). Multivariate analysis revealed that POM had significant preventive effects against postoperative SSI (estimate: -0.245, standard error: 0.080, P < .01). Surgical site, American Society of Anesthesiologists classification, and operation time were also significant and independent clinical predictors of SSI. The analysis of real-world data from 16 university hospitals revealed that, regardless of the content and degree of the problem, the addition of POM has significant beneficial effects in reducing the risk of SSI in patients who undergo abdominal surgery. Medical records from each hospital and data from the Health Care Payment Fund were collected and analyzed retrospectively.
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Affiliation(s)
- Tetsu Shimane
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Kazuyuki Koike
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
| | - Shigeyuki Fujita
- Oral and Maxillofacial Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hiroshi Kurita
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Emiko Tanaka Isomura
- First Department of Oral and Maxillofacial Surgery, Osaka University, Graduate School of Dentistry: Unit of Dentistry, Osaka University Hospital, Suita, Japan
| | - Daichi Chikazu
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Tokyo Medical University, Tokyo, Japan
| | - Naomi Kanno
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Satoshi Hino
- Department of Oral and Maxillofacial Surgery, Ehime University Graduate School of Medicine, Toon, Japan
| | - Hideharu Hibi
- Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takahiro Koyama
- Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Seiji Nakamura
- Section of Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takeshi Nomura
- Department of Oral Medicine, Oral and maxillofacial Surgery, Tokyo Dental College, Chiba, Japan
| | - Yoshiyuki Mori
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan
| | - Itaru Tojyo
- Oral and Maxillofacial Surgery, Wakayama Medical University, Wakayama, Japan
| | - Toshiro Yamamoto
- Department of Dental Medicine, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan
| | - Iku Yamamori
- Department of Dentistry and Oral Surgery, Yamagata University Hospital, Yamagata, Japan
| | - Keiko Aota
- Department of Oral Medicine, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Hideki Tanzawa
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
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13
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Poovarodom P, Rungsiyakull C, Suriyawanakul J, Li Q, Sasaki K, Yoda N, Rungsiyakull P. Effect of gingival height of a titanium base on the biomechanical behavior of 2-piece custom implant abutments: A 3-dimensional nonlinear finite element study. J Prosthet Dent 2023; 130:380.e1-380.e9. [PMID: 37482534 DOI: 10.1016/j.prosdent.2023.06.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/25/2023]
Abstract
STATEMENT OF PROBLEM Titanium base (TiBase) abutments to restore an implant-supported single crown are available in different gingival heights, but information on the biomechanical effects of the gingival heights is lacking. PURPOSE The purpose of this nonlinear finite element analysis study was to evaluate the effects of TiBase gingival heights on the biomechanical behavior of custom zirconia (CustomZir) abutments and TiBase, including von Mises stress and maximum and minimum principal stress. MATERIAL AND METHODS TiBases with different gingival heights (0.5 mm, 1 mm, 1.5 mm, and 2 mm) with internal hexagon Morse taper connections were simulated in 3-dimensional models. The simulations (ANSYS Workbench 2020; ANSYS Inc) included the OsseoSpeed EV implant (Ø5.4 mm) (AstraTech; Dentsply Sirona), restoration, and surrounding bone in the mandibular first molar region. An occlusal force of 200 N was applied with a 2-mm horizontal offset toward the buccal side and a 30-degree inclination from the vertical axis. RESULTS High-stress concentration was observed in the uppermost internal connection area on the buccal side and the antirotational part of the titanium abutment on the lingual side in all models. CustomZir abutments with a shorter gingival height exhibited larger concentrated areas of volume average stress von Mises stress and higher magnitude of maximum and minimum principal stress compared with a taller gingival height. CONCLUSIONS A TiBase abutment with a taller gingival height reduced the fracture risk of a CustomZir abutment without increasing any mechanical risk.
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Affiliation(s)
- Pongsakorn Poovarodom
- PhD candidate, Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Chaiy Rungsiyakull
- Assistant Professor, Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, Thailand
| | - Jarupol Suriyawanakul
- Assistant Professor, Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand
| | - Qing Li
- Professor, School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering, The University of Sydney, Sydney, NSW, Australia
| | - Keiichi Sasaki
- President, Miyagi University, Taiwa, Miyagi, Japan; Executive Adviser, Tohoku University, Sendai, Miyagi, Japan
| | - Nobuhiro Yoda
- Senior Assistant Professor, Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Pimduen Rungsiyakull
- Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
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14
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Shimada A, Ogawa T, Sammour SR, Narihara T, Kinomura S, Koide R, Noma N, Sasaki K. Effectiveness of exercise therapy on pain relief and jaw mobility in patients with pain-related temporomandibular disorders: a systematic review. Front Oral Health 2023; 4:1170966. [PMID: 37521175 PMCID: PMC10382173 DOI: 10.3389/froh.2023.1170966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 06/29/2023] [Indexed: 08/01/2023] Open
Abstract
Background Orofacial pain conditions are complex disorders that involve biological, social, and psychological factors. Temporomandibular Disorders (TMDs) are one of the most common orofacial pain conditions, and our previous literature review indicated that exercise therapy has shown promise in reducing TMD-related pain. However, more evidence is needed to firmly establish its effectiveness. Objectives This systematic review aims to investigate the effectiveness of exercise therapy on pain relief and jaw mobility in patients with pain-related TMDs. Methods To include randomized controlled trials (RCTs) written in English, a literature search was performed using PubMed, Scopus, Web of Science, Cochrane Library, Ovid, EBM reviews, and Academic Search Complete initially from 4th November 2020 until March 2022. A PICOS for this review was as follows; P: Patients with TMD myalgia or arthralgia, I: Excursion exercise, Stretch exercises, Resistance exercise, or Coordination exercise, C: No treatment or education only. O: Pain intensity and Range of Motion (ROM), S: RCTs. After title screening, a full-text assessment was done to extract data. According to Risk of Bias (RoB) 2.0, risk of bias was assessed in each included paper by 2 reviewers independently. Results A total of 3,388 titles were identified from the electronic database search. After the screening and full-text evaluation, only 5 studies (145 participants) were eligible to be included. Among the exercise modalities, coordination exercise showed a significant effect on pain relief and improvement of joint mobility. Discussion Due to the heterogeneity and small sample size of the included studies, a meta-analysis was not feasible. However, this systematic review suggested that exercise therapy, especially coordinate exercise, can be effective in managing painful TMD conditions. Further research is needed to establish optimal parameters for this patient population, as well as standardization and consistency in terminology and treatment structure.
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Affiliation(s)
- Akiko Shimada
- Department of Oral Health Sciences, Faculty of Health Sciences, Osaka Dental University, Osaka, Japan
- Department of Geriatric Dentistry, Osaka Dental University, Osaka, Japan
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Sara Reda Sammour
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Prosthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
| | - Taichi Narihara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Shiori Kinomura
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Rie Koide
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Noboru Noma
- Department of Oral Medicine, Nihon University School of Dentistry, Tokyo, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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15
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Tsogtsaikhan K, Hatano Y, Kosaka M, Yoshida K, Minjuur T, Garidkhuu A, Sasaki K, Suzuki T. Development of formulae for dental age estimation using digital radiographs in the Mongolian population. Leg Med (Tokyo) 2023; 62:102234. [PMID: 36933509 DOI: 10.1016/j.legalmed.2023.102234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 02/23/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023]
Abstract
This study aimed to examine the applicability of the pulp/tooth ratio (PTR) method for age estimation in Mongolian populations using panoramic radiographs and derive new regression formulae. Moreover, we aimed to assess the accuracy of these formulae in other subjects from the Mongolian population and compare them with the other formulae derived from different Asian populations. The total sample size of the study was 381. The formulae were derived from the examination of panoramic radiographs of 271 individuals aged 15-62 years. Following Cameriere's method, PTR was calculated for the upper and lower canine teeth. Linear regression analyses were performed between the actual age and that obtained from upper-lower canine PTR and established formulae for age estimation. To verify the formulae, two types of test samples were collected: 73 panoramic radiographs and 37 periapical radiographs. The estimated age was calculated using our new formulae and three other formulae derived from Asian populations. The correlation coefficient between the actual age and that obtained by PTR was significantly negative for both canines. According to our new regression formulae, the differences between the estimated age and actual age showed a bell-shaped curve distribution in both test groups. While using the other formulae derived from the Asian population, the distribution patterns obtained were significantly different in the Mongolian population. This study was the first to examine the relationship between actual age and PTR in Mongolian population, and these results advance the field of forensic science in Mongolia.
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Affiliation(s)
- Khongorzul Tsogtsaikhan
- Division of Dental and Digital Forensics, Graduate School of Dentistry, Tohoku University, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan; School of Dentistry, Mongolian National University of Medical Sciences, 14210, Ulaanbaatar City, Sukhbaatar District, S. Zorig Street, Mongolia.
| | - Yuka Hatano
- Division of Dental and Digital Forensics, Graduate School of Dentistry, Tohoku University, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan; Creative Interdisciplinary Research Division, Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 6-3, Aramaki aza Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan.
| | - Moe Kosaka
- Division of Dental and Digital Forensics, Graduate School of Dentistry, Tohoku University, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan.
| | - Kie Yoshida
- Division of Dental and Digital Forensics, Graduate School of Dentistry, Tohoku University, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan.
| | - Tserenbat Minjuur
- School of Bio-Medicine, Mongolian National University of Medical Sciences, 14210, Ulaanbaatar City, Sukhbaatar District, S. Zorig Street, Mongolia.
| | - Ariuntuul Garidkhuu
- School of Dentistry, Mongolian National University of Medical Sciences, 14210, Ulaanbaatar City, Sukhbaatar District, S. Zorig Street, Mongolia; School of Medicine, International University of Health and Welfare, 4-3, Kozunomori, Narita, Chiba 286-8686, Japan.
| | - Keiichi Sasaki
- Division of Dental and Digital Forensics, Graduate School of Dentistry, Tohoku University, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan.
| | - Toshihiko Suzuki
- Division of Dental and Digital Forensics, Graduate School of Dentistry, Tohoku University, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan.
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16
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Khalil S, Sasaki K. Survey of fellowship program directors in minimally invasive gynecologic surgery: fellow participation in quality improvement and patient safety initiatives. Am J Obstet Gynecol 2023. [DOI: 10.1016/j.ajog.2022.12.197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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17
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Wada T, Hinata A, Furuta Y, Sasaki K, Konoplev A, Nanba K. Factors affecting 137Cs radioactivity and water-to-body concentration ratios of fish in river and pond environments near the Fukushima Dai-ichi Nuclear Power Plant. J Environ Radioact 2023; 258:107103. [PMID: 36599216 DOI: 10.1016/j.jenvrad.2022.107103] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 12/17/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
To elucidate 137Cs contamination levels and mechanisms of fish inhabiting river and pond environments near the Fukushima Dai-ichi Nuclear Power Plant, 137Cs activity concentrations in fish (15 species, n = 164) and water collected from Maeda River (3.3-8.9 km from the plant) and Shimofukazawa Pond (2.9 km) in 2017 were analyzed. Also, an 8-week rearing experiment using Japanese dace Pseudaspius hakonensis fed on non-contaminated pellets and the pond water (mean 137Cs concentration of 2.0 Bq/L) was conducted to evaluate 137Cs accumulation from water to fish. The 137Cs concentrations in Japanese dace, the only species collected throughout five sampling sites from estuarine to upstream areas in Maeda River, were found to be correlated with ambient air dose rates and fish size, exhibiting large variations (16.5-2.6×103 Bq/kg-wet). By contrast, dissolved 137Cs in river waters increased from the upper to lower course (0.025-0.28 Bq/L), which caused large variations of the water-to-body concentration ratio (CR) in Japanese dace (60.0-35700 L/kg-wet). These CRs (geometric mean of 3670 L/kg-wet) were much higher than the steady-state CR of reared fish (9.7 L/kg-wet), indicating that river fish uptake 137Cs mainly from prey items from aquatic and riparian zones, rather than from water. Statistically significant negative correlations between K+ concentrations in water and river fish CRs were detected, resulting in the decreasing trend of CRs from upstream to estuarine areas. These results suggest that the large heterogeneity of air dose rates, K+ concentration, and estuarine processes in brackish water habitats, in association with the feeding habit and size effect in fish, can engender wide variation of 137Cs concentrations and CRs of river fish along a river course. In contrast, 137Cs concentrations in pond fish (4.3-14.6 kBq/kg-wet) were higher than in river fish. The CRs of pond fish were constantly high but the range was smaller (1010-3440 L/kg-wet) with larger values in fish of higher trophic levels. These findings suggest that biomagnification within a pond was inferred as the main cause of 137Cs contamination of pond fish.
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Affiliation(s)
- Toshihiro Wada
- Institute of Environmental Radioactivity, Fukushima University, Fukushima, Fukushima, 960-1296, Japan.
| | - Akinori Hinata
- Faculty of Symbiotic Systems Science, Fukushima University, Fukushima, Fukushima, 960-1296, Japan
| | - Yuma Furuta
- Faculty of Symbiotic Systems Science, Fukushima University, Fukushima, Fukushima, 960-1296, Japan
| | - Keiichi Sasaki
- Fukushima Prefectural Inland Water Fisheries Experiment Station, Inawashiro, Fukushima, 969-3283, Japan
| | - Alexei Konoplev
- Institute of Environmental Radioactivity, Fukushima University, Fukushima, Fukushima, 960-1296, Japan
| | - Kenji Nanba
- Institute of Environmental Radioactivity, Fukushima University, Fukushima, Fukushima, 960-1296, Japan; Faculty of Symbiotic Systems Science, Fukushima University, Fukushima, Fukushima, 960-1296, Japan
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Assoratgoon I, Shiraishi N, Tagaino R, Ogawa T, Sasaki K. Sensory neuromuscular electrical stimulation for dysphagia rehabilitation: A literature review. J Oral Rehabil 2023; 50:157-164. [PMID: 36357332 DOI: 10.1111/joor.13391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 08/23/2022] [Accepted: 11/02/2022] [Indexed: 11/12/2022]
Abstract
BACKGROUND Dysphagia is a common disorder following a cerebrovascular accident. It can cause detrimental effects on patient's quality of life and nutrition intake, especially in older adults. Neuromuscular electrical stimulation has been one of the management strategies for acceleration of the recovery. This review summarises the current evidence on sensory threshold stimulation of the procedure. METHOD This review compiled data from the Internet database PubMed, Cochrane Library and Scopus using combination of MeSH thesaurus: 'Sensory threshold', 'electrical stimulation', 'neuromuscular stimulation', 'Deglutition', 'Dysphagia'. Eleven studies were intergraded into the review. RESULTS Most of the studies show significant improvement to the outcomes of sensory neuromuscular electrical stimulation treatment. In many cases, the results of the treatment are comparable or superior to motor threshold stimulation and conventional therapy. However, the study design and parameters of the procedure varied greatly without conclusive standardised guidelines. CONCLUSION The sensory neuromuscular electrical stimulation (SNMES) is a viable treatment option for treating oropharyngeal dysphagia. The most suggested application parameters are an intensity at sensory threshold, a frequency of 80 Hz, an impulse time of 700 μs, a combined total duration of 20 h of stimulation in a 2-week period, and placing the electrodes in the submental area of the neck. However, further research is necessary to construct a definitive guideline for clinicians.
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Affiliation(s)
- Itt Assoratgoon
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Chulalongkorn University, Bangkok, Thailand
| | - Naru Shiraishi
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Center for Dysphagia of Tohoku University Hospital, Sendai, Japan
| | - Ryo Tagaino
- Center for Dysphagia of Tohoku University Hospital, Sendai, Japan.,Maxillofacial Prosthetics Clinic, Tohoku University Hospital, Sendai, Japan
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Wang H, Tenkumo T, Nemoto E, Kanda Y, Ogawa T, Sasaki K. Introduction of tenomodulin by gene transfection vectors for rat bone tissue regeneration. Regen Ther 2023; 22:99-108. [PMID: 36712960 PMCID: PMC9842804 DOI: 10.1016/j.reth.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/17/2022] [Accepted: 12/22/2022] [Indexed: 01/13/2023] Open
Abstract
Introduction Periodontal ligament is regenerated in association with hard tissue regeneration. Tenomodulin (Tnmd) expression has been confirmed in periodontal ligament and it reportedly inhibits angiogenesis or is involved in collagen fibril maturation. The introduction of Tnmd by gene transfection in bone tissue regeneration therapy might inhibit topical hard tissue formation and induce the formation of dense fibrous tissue. Therefore, the effect of Tnmd introduction by gene transfection technique in vitro and in vivo was investigated in this study. Methods Osteogenesis- and chondrogenesis-related gene expression levels in osteoblastic cells (MC3T3E1) and rat bone marrow derived cells were detected using qPCR three days after gene transfection with plasmid DNA (Tnmd) using non-viral gene transfection vectors: a calcium phosphate-based gene transfection vector (CaP(Tnmd)) or a cationic polymer-based reagent (JetPEI (Tnmd)). Next, an atelocollagen scaffold with or without CaP (Tnmd) or JetPEI (Tnmd) was implanted into a rat calvaria bone defect, and the remaining bone defect volume and the tissue reaction at 28 days after surgery were evaluated. Results Runx 2 and SP7 mRNA was reduced by JetPEI (Tnmd) in both cells, but not in CaP(Tnmd). The volume of expressed Tnmd was at 9 ng/mL in both gene transfection vector. The remaining bone defect volume of JetPEI (Tnmd) was significantly bigger than that of the other groups and CaP (EGFP), and that of CaP (Tnmd) was significantly bigger than that of CaP (EGFP). Conclusions Tnmd introduction treatment inhibits bone formation in artificial bone defect, however, the effect of that was dependent on non-viral gene transfection vector.
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Affiliation(s)
- Han Wang
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Taichi Tenkumo
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
- Corresponding author. Fax.: (+81)(022)717-8371.
| | - Eiji Nemoto
- Division of Periodontology, Department of Oral Biology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Yoshiaki Kanda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
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Mouri N, Sasaki M, Yagimaki T, Murakami M, Igari K, Sasaki K. Development of a Training Simulator for Caregivers' Toothbrushing Skill Using Virtual Reality. ABE 2023. [DOI: 10.14326/abe.12.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023] Open
Affiliation(s)
- Nene Mouri
- Graduate School of Engineering, Iwate University
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Shirato M, Nakamura K, Tenkumo T, Niwano Y, Kanno T, Sasaki K, Lingström P, Örtengren U. Inhibition of tooth demineralization caused by Streptococcus mutans biofilm via antimicrobial treatment using hydrogen peroxide photolysis. Clin Oral Investig 2023; 27:739-750. [PMID: 36484848 PMCID: PMC9889499 DOI: 10.1007/s00784-022-04821-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 11/26/2022] [Indexed: 12/13/2022]
Abstract
OBJECTIVES An antimicrobial technique utilizing hydroxyl radicals generated by the photolysis of 3% H2O2 has been developed recently. The present study aimed to evaluate the effect of H2O2 photolysis treatment on tooth demineralization caused by Streptococcus mutans biofilm. MATERIALS AND METHODS To induce tooth demineralization, S. mutans biofilm was allowed to form on the maxillary first molars collected from Wistar rats via 24-h culturing. The samples were immersed in 3% H2O2 and irradiated with 365-nm LED (H2O2 photolysis treatment). Viable bacterial counts in the biofilm were evaluated immediately after treatment and after an additional 30-h culturing by colony counting. The acidogenicity of the biofilm, re-established 30 h after treatment, was assessed by measuring the pH. The effect of H2O2 photolysis treatment on tooth demineralization was assessed by measuring the depth of the radiolucent layer in micro-CT images. RESULTS H2O2 photolysis significantly reduced viable bacterial counts in the biofilm to 3.7 log colony forming units (CFU)/sample, while the untreated group had 7.9 log CFU/sample. The pH of the biofilm re-established after treatment (6.6) was higher than that of the untreated group (5.3). In line with the pH measurement, the treatment group had a significantly lower depth of radiolucent layer in dentin than the untreated group. CONCLUSIONS H2O2 photolysis treatment was effective not only in killing the biofilm-forming S. mutans but also in lowering the acidogenicity of the biofilm. Thus, this technique could inhibit tooth demineralization. CLINICAL RELEVANCE H2O2 photolysis can be applicable as a new dental caries treatment.
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Affiliation(s)
- Midori Shirato
- Department of Cariology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden ,Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-Machi, Aoba-Ku, Sendai, 980-8575 Japan
| | - Keisuke Nakamura
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-Machi, Aoba-Ku, Sendai, 980-8575 Japan
| | - Taichi Tenkumo
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-Ku, Sendai, 980-8575 Japan
| | - Yoshimi Niwano
- Faculty of Nursing, Shumei University, 1-1 Daigaku-Cho, Yachiyo, 276-0003 Japan
| | - Taro Kanno
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-Machi, Aoba-Ku, Sendai, 980-8575 Japan
| | - Keiichi Sasaki
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-Machi, Aoba-Ku, Sendai, 980-8575 Japan ,Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-Ku, Sendai, 980-8575 Japan
| | - Peter Lingström
- Department of Cariology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Ulf Örtengren
- Department of Cariology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden
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22
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Xiao L, Shiwaku Y, Hamai R, Baba K, Tsuchiya K, Imazato S, Sasaki K, Suzuki O. Osteogenic capacity of octacalcium phosphate involving macrophage polarization. J Biomed Mater Res A 2022; 111:1006-1020. [PMID: 36573692 DOI: 10.1002/jbm.a.37484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 11/16/2022] [Accepted: 12/08/2022] [Indexed: 12/28/2022]
Abstract
Previous research has found that octacalcium phosphate (OCP) increases macrophage accumulation and alters the initial inflammatory response. However, the role of the immune response induced by OCP in osteogenesis remains unknown. This study investigated the behavior of macrophages and bone regeneration capacity during the early inflammatory stage of OCP-mediated osteogenesis. To assess the change in macrophage polarization and osteogenic capacity, we used a standardized rat defect model filled with OCP or calcium-deficient hydroxyapatite (CDHA)-a material obtained through the hydrolysis of the original OCP. OCP or CDHA granules were incubated with RAW264 cells for 5 days to investigate the effect of physicochemical characteristics on macrophage cytokine/chemokine expression in vitro. Our in vivo results show that due to the OCP implantation, macrophages in the rat tibial defect area tend to polarize to the M2 phenotype (anti-inflammatory) and inhibit the formation of the M1 phenotype (pro-inflammatory). In comparison to CDHA, OCP exhibited superior bone regeneration potential due to its rapid promotion of cortical bone healing and stimulation of macrophage-related growth factors. Furthermore, our in vitro results have shown that OCP regulates the expression of macrophage chemokines over time. Compared to incubation with CDHA, incubation with OCP caused changes in the ionic microenvironment. These findings suggest that the OCP-mediated macrophage polarization and secretion profile not only regulate immune function but also positively affect osteogenesis.
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Affiliation(s)
- Linghao Xiao
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
- Division of Advanced Prosthetic Dentistry Tohoku University Graduate School of Dentistry Sendai Japan
- Department of Advanced Functional Materials Science Osaka University Graduate School of Dentistry Suita Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
| | - Kazuyoshi Baba
- Department of Orthopedic Surgery Tohoku University Graduate School of Medicine Sendai Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
| | - Satoshi Imazato
- Department of Biomaterials Science Osaka University Graduate School of Dentistry Suita Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry Tohoku University Graduate School of Dentistry Sendai Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
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Wan B, Yoda N, Zheng K, Zhang Z, Wu C, Clark J, Sasaki K, Swain M, Li Q. On interaction between fatigue of reconstruction plate and time-dependent bone remodeling. J Mech Behav Biomed Mater 2022; 136:105483. [PMID: 36302272 DOI: 10.1016/j.jmbbm.2022.105483] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVE The fibula free flap (FFF) has been extensively used to repair large segmental bone defects in the maxillofacial region. The reconstruction plate plays a key role in maintaining stability and load-sharing while the fibula unites with adjacent bone in the course of healing and remodeling. However, not all fibula flaps would fully unite, and fatigue of prosthetic devices has been recognized as one major concern for long-term load-bearing applications. This study aims to develop a numerical approach for predicting the fatigue life of the reconstruction plate by taking into account the effect of ongoing bone remodeling. METHODS The patient-specific mandible reconstruction with a prosthetic system is studied in this work. The 3D finite element model with heterogeneous material properties obtained from clinical computerized tomography (CT) data is developed for bone, and eXtended Finite Element Method (XFEM) is adopted for the fatigue analysis of the plate. During the remodeling process, the changing apparent density and Young's modulus of bone are simulated in a step-wise fashion on the basis of Wolff's law, which is correlated with the specific clinical follow-up. The maximum biting forces were considered as the driving force on the bone remodeling, which are measured clinically at different time points (4, 16 and 28 months) after reconstruction surgery. RESULTS Under various occlusal loadings, the interaction between fatigue crack growth and bone remodeling is investigated to gain new insights for the future design of prosthetic devices. The simulation results reveal that appropriate remodeling of grafted bone could extend the fatigue life of fixation plates in a positive way. On the other hand, the rising occlusal load associated with healing and remodeling could lead to fatigue fracture of fixation plate and potentially cause severe bone resorption. CONCLUSION This study proposes an effective approach for more realistically predicting fatigue life of prosthetic devices subject to a tissue remodeling condition in-silico. It is anticipated to provide a guideline for deriving an optimal design of patient-specific prosthetic devices to better ensure longevity.
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Affiliation(s)
- Boyang Wan
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia.
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 9808575, Japan.
| | - Keke Zheng
- College of Engineering, Mathematics, and Physical Sciences, University of Exeter, EX4 4QF, United Kingdom.
| | - Zhongpu Zhang
- School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW, 2751, Australia.
| | - Chi Wu
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia.
| | - Jonathan Clark
- Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, NSW, 15, Australia.
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 9808575, Japan.
| | - Michael Swain
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia.
| | - Qing Li
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia.
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Assoratgoon I, Yoda N, Iwamoto M, Sato T, Kawata T, Egusa H, Sasaki K. In vivo measurement of three-dimensional load exerted on dental implants: a literature review. Int J Implant Dent 2022; 8:52. [DOI: 10.1186/s40729-022-00454-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 10/17/2022] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
For biomechanical consideration of dental implants, an understanding of the three-dimensional (3D) load exerted on the implant is essential, but little information is available on the in vivo load, including the measuring devices.
Purpose
This review aimed to evaluate studies that used specific load-measuring devices that could be mounted on an implant to measure the functional load in vivo.
Materials and methods
An electronic search utilizing the internet research databases PubMed, Google Scholar, and Scopus was performed. The articles were chosen by two authors based on the inclusion and exclusion criteria.
Results
In all, 132 studies were selected from the database search, and 16 were selected from a manual search. Twenty-three studies were finally included in this review after a complete full-text evaluation. Eleven studies were related to the force measurements using the strain gauges, and 12 were related to the piezoelectric force transducer. The principles of the two types of devices were completely different, but the devices produced comparable outcomes. The dynamics of the load magnitude and direction on the implant during function were clarified, although the number of participants in each study was small.
Conclusions
The load exerted on the implant during function was precisely measured in vivo using specific measuring devices, such as strain gauges or piezoelectric force transducers. The in vivo load data enable us to determine the actual biomechanical status in more detail, which might be useful for optimization of the implant prosthetic design and development of related materials. Due to the limited data and difficulty of in vivo measurements, the development of a new, simpler force measurement device and method might be necessary.
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Tsuji T, Nagata K, Sasaki K, Matsukane R, Ishida S, Kawashiri T, Suetsugu K, Watanabe H, Hirota T, Ieiri I. Analysis of the thinking process of pharmacists in response to changes in the dispensing environment using the eye-tracking method. J Pharm Health Care Sci 2022; 8:23. [PMID: 36045385 PMCID: PMC9434836 DOI: 10.1186/s40780-022-00254-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 07/26/2022] [Indexed: 08/23/2023] Open
Abstract
Background Pharmacists must understand the mechanisms by which dispensing errors occur and take appropriate preventive measures. In this study, the gaze movements of pharmacists were analyzed using an eye-tracking method, to elucidate the thinking process of pharmacists when identifying target drugs and avoiding dispensing errors. Methods We prepared verification slides and projected them on a large screen. Each slide comprised a drug rack area and a prescription area; the former consisted of a grid-like layout with 55 drugs and the latter displayed dispensing information (drug name, drug usage, location number, and total amount). Twelve pharmacists participated in the study, and three single-type drugs and six double-type drugs were used as target drugs. We analyzed the pharmacists’ method of identifying the target drugs, the mechanisms by which errors occurred, and the usefulness of drug photographs using the error-induction (−) /photo (+), error-induction (+) / (+), and error-induction (+) /photo (−) models. Results Visual invasion by non-target drugs was found to have an effect on the subsequent occurrence of dispensing errors. In addition, when using error-induction models, the rate of dispensing error was 2.8 and 11.1% for the photo (+) and photo (−) models, respectively. Furthermore, based on the analysis of eight pharmacists who dispensed drugs without errors, it was clear that additional confirmation of “drug name” was required to accurately identify the target drug in the photo (+) model; additionally, that of “location number” was required to pinpoint directly the position of target drug in the photo (−) model. Conclusions By analyzing the gaze movements of pharmacists using the eye-tracking method, we clarified pharmacists’ thinking process which was required to avoid dispensing errors in a complicated environment and proved the usefulness of drug photographs in terms of both reducing the complexity of the dispensing process and the risk of dispensing errors. Effective measures to prevent dispensing errors include ensuring non-adjacent placement of double-type drugs and utilization of their image information.
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Affiliation(s)
- Toshikazu Tsuji
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan.
| | - Kenichiro Nagata
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Keiichi Sasaki
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | | | - Shigeru Ishida
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Takehiro Kawashiri
- Clinical Pharmacy Education Center, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | | | | | - Takeshi Hirota
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Ichiro Ieiri
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
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Poovarodom P, Rungsiyakull C, Suriyawanakul J, Li Q, Sasaki K, Yoda N, Rungsiyakull P. Effect of implant placement depth on bone remodeling on implant-supported single zirconia abutment crown: A 3D finite element study. J Prosthodont Res 2022; 67:278-287. [PMID: 35934782 DOI: 10.2186/jpr.jpr_d_22_00054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE This study aimed to evaluate the influence of subcrestal implant placement depth on bone remodeling using time-dependent finite element analysis (FEA) with a bone-remodeling algorithm over 12 months. METHODS Seven models of different subcrestal implant placement depths (0, 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm) were analyzed using FEA to evaluate the biomechanical responses in the bone and implant, including von Mises equivalent stress, strain energy density (SED), and overloading elements. SED was used as a mechanical stimulus to simulate cortical and cancellous bone remodeling over the first 12 months after final prosthesis delivery. RESULTS The highest increase in cortical bone density was observed at Depth 1.5, whereas the lowest increase was observed at Depth 3.0. In contrast, the highest increase in bone density was observed at Depth 3.0 in the cancellous bone, whereas the lowest increase was observed at Depth 0. The highest peak von Mises stress in the cortical bone occurred at Depth 2.5 (107.24 MPa), while that in the cancellous bone was at Depth 2.5 (34.55 MPa). Notably, the maximum von Mises stress values in the cancellous bone exceeded the natural limit of the bony material, as indicated by the overloading elements observed at the depths of 2.0, 2.5, and 3.0 mm. CONCLUSION Greater bone density apposition is observed with deeper implant placement. An implant depth of more than 1.5 mm exhibited a higher maximum von Mises stress and greater overloading elements.
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Affiliation(s)
- Pongsakorn Poovarodom
- PhD Student, Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Thailand
| | - Chaiy Rungsiyakull
- Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Thailand
| | - Jarupol Suriyawanakul
- Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, Thailand
| | - Qing Li
- School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering, The University of Sydney, Australia
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Japan
| | - Nobuhiro Yoda
- Graduate School of Dentistry, Division of Prosthetic Dentistry, Tohoku University, Japan
| | - Pimduen Rungsiyakull
- Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Thailand
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Oka T, Takahashi A, Koarai K, Kino Y, Sekine T, Shimizu Y, Chiba M, Suzuki T, Osaka K, Sasaki K, Shinoda H. Detection limit of electron spin resonance for Japanese deciduous tooth enamel and density separation method for enamel-dentine separation. J Radiat Res 2022; 63:609-614. [PMID: 35780302 PMCID: PMC9303628 DOI: 10.1093/jrr/rrac033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/27/2021] [Indexed: 06/15/2023]
Abstract
Electron spin resonance (ESR) dosimetry is one of the most powerful tools for radiation dose reconstruction. The detection limit of this technique using human teeth is reported to be 56 mGy or 67 mGy; however, the absorbed dose of Fukushima residents after the Fukushima Daiichi Nuclear Power Plant (FNPP) accident was estimated to be lower than this detection limit. Our aim is to assess the absorbed radiation dose of children in Fukushima Prefecture after the accident; therefore, it is important to estimate the detection limit for their teeth. The detection limit for enamel of deciduous teeth of Japanese children separated by the mechanical method is estimated to be 115.0 mGy. The density separation method can effectively separate enamel from third molars of Japanese people. As we have collected thousands of teeth from children in Fukushima, the present technique may be useful to examine their external absorbed dose after the FNPP accident.
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Affiliation(s)
- Toshitaka Oka
- Corresponding author. Research Group for Nuclear Chemistry, Chemistry, Environment and Radiation Division, Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan.
| | - Atsushi Takahashi
- Tohoku University Hospital, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8574, Japan
| | - Kazuma Koarai
- Collaborative Laboratories for Advanced Decommissioning Science, Sector of Fukushima Research and Development, Japan Atomic Energy Agency, 790-1 Ohtsuka, Motooka, Tomioka Town, Futaba County, Fukushima 979-1151, Japan
| | - Yasushi Kino
- Institute for Excellence in Higher Education, Tohoku University, 41 Kawauchi, Aoba-ku, Sendai City, Miyagi 980-8576, Japan
| | - Tsutomu Sekine
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-aoba, Aoba-ku, Sendai City, Miyagi 980-8578, Japan
- Institute for Excellence in Higher Education, Tohoku University, 41 Kawauchi, Aoba-ku, Sendai City, Miyagi 980-8576, Japan
| | - Yoshinaka Shimizu
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Mirei Chiba
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Toshihiko Suzuki
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Ken Osaka
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Keiichi Sasaki
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Hisashi Shinoda
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
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28
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Kakinuma H, Izumita K, Yoda N, Egusa H, Sasaki K. Comparison of the accuracy of resin-composite crowns fabricated by three-dimensional printing and milling methods. Dent Mater J 2022; 41:808-815. [PMID: 35793943 DOI: 10.4012/dmj.2022-074] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to compare the dimensional accuracies of three-dimensional (3D)-printed and milled resin-composite crowns, and to determine acceptable abutment-tooth shapes for printing. Four first-molar abutment models were prepared: the master model form and three models with sharp occluso-axial line angles. Crowns were designed on each abutment using computer-aided design software. The drill-offset value was set at 0.0 or 0.5 mm to evaluate the effect on the dimensional accuracy of milling. A digital light processing-based 3D printer was used to fabricate 3D-printed crowns. Milled crowns were fabricated by wet-milling. The trueness was evaluated by superimposing the design data. Regardless of the abutment form, 3D-printed crowns showed higher accuracy with fewer marginal discrepancies than milled crowns. Milled crowns showed significant dimensional deviations, especially at cusps. Moreover, offset correction resulted in grooves on the internal surface of milled crowns with negative deviations, which were especially evident in crowns for the sharp models.
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Affiliation(s)
- Hiroaki Kakinuma
- Department of Next-generation Dental Material Engineering, Tohoku University Graduate School of Dentistry
| | - Kuniyuki Izumita
- Department of Next-generation Dental Material Engineering, Tohoku University Graduate School of Dentistry
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry
| | - Keiichi Sasaki
- Department of Next-generation Dental Material Engineering, Tohoku University Graduate School of Dentistry.,Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
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29
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Sasaki K, Muramatsu M, Hirayama K, Endo K, Murayama M. Nanoscale defect evaluation framework combining real-time transmission electron microscopy and integrated machine learning-particle filter estimation. Sci Rep 2022; 12:10525. [PMID: 35732650 PMCID: PMC9217921 DOI: 10.1038/s41598-022-13878-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 05/30/2022] [Indexed: 11/30/2022] Open
Abstract
Observation of dynamic processes by transmission electron microscopy (TEM) is an attractive technique to experimentally analyze materials’ nanoscale phenomena and understand the microstructure-properties relationships in nanoscale. Even if spatial and temporal resolutions of real-time TEM increase significantly, it is still difficult to say that the researchers quantitatively evaluate the dynamic behavior of defects. Images in TEM video are a two-dimensional projection of three-dimensional space phenomena, thus missing information must be existed that makes image’s uniquely accurate interpretation challenging. Therefore, even though they are still a clustering high-dimensional data and can be compressed to two-dimensional, conventional statistical methods for analyzing images may not be powerful enough to track nanoscale behavior by removing various artifacts associated with experiment; and automated and unbiased processing tools for such big-data are becoming mission-critical to discover knowledge about unforeseen behavior. We have developed a method to quantitative image analysis framework to resolve these problems, in which machine learning and particle filter estimation are uniquely combined. The quantitative and automated measurement of the dislocation velocity in an Fe-31Mn-3Al-3Si autunitic steel subjected to the tensile deformation was performed to validate the framework, and an intermittent motion of the dislocations was quantitatively analyzed. The framework is successfully classifying, identifying and tracking nanoscale objects; these are not able to be accurately implemented by the conventional mean-path based analysis.
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Affiliation(s)
- K Sasaki
- Department of Science for Open and Environmental Systems, Graduate School of Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Kanagawa, 233-8522, Japan
| | - M Muramatsu
- Department of Science for Open and Environmental Systems, Graduate School of Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Kanagawa, 233-8522, Japan.
| | - K Hirayama
- Department of Science for Open and Environmental Systems, Graduate School of Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Kanagawa, 233-8522, Japan
| | - K Endo
- Department of Science for Open and Environmental Systems, Graduate School of Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Kanagawa, 233-8522, Japan
| | - M Murayama
- Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA, 24061, USA.,Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
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30
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Hihara H, Izumita K, Iwatsu M, Sato T, Tagaino R, Shobara K, Shinohara Y, Hatakeyama T, Kayaba C, Sato M, Tokue A, Sugawara T, Ashino K, Ikeda K, Aida J, Sasaki K. Clinical Trial for Evaluating the Effectiveness and Safety of a New Dental Plaque Removal Device: Microscale Mist Unit. Antibiotics (Basel) 2022; 11:antibiotics11060825. [PMID: 35740231 PMCID: PMC9219637 DOI: 10.3390/antibiotics11060825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 12/10/2022] Open
Abstract
This study evaluates the effectiveness and safety of a microscale mist unit (MSM-UNIT) that sprays high-speed fine water droplets to remove dental plaque adhering to the oral mucosa (tongue and palate) and tooth surface. Fifteen patients who had difficulty self-managing sufficient oral care were included in this study. Effectiveness was evaluated for at least five patients' tongues, palate mucosas, and tooth surfaces, and safety evaluation was conducted at all three sites for all patients. Effectiveness was evaluated using the rate of degree of dental plaque removal. Safety was evaluated using a numerical rating scale (NRS) for pain and symptoms of inflammation. An operator who performed treatment and an evaluator who evaluated effectiveness and safety were designated. In addition, an image judgment committee judged effectiveness. Although evaluation of the tongue varied between the evaluators and the image judgment committee, the rates of degree for all plaque removal increased in all regions. In addition, low pain NRS results and minimal symptoms of inflammation were observed and within an acceptable range. The MSM-UNIT can be used effectively and safely for removing oral plaque not only from teeth, but also from the oral mucosa.
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Affiliation(s)
- Hiroki Hihara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
- Correspondence: ; Tel.: +81-22-717-8369
| | - Kuniyuki Izumita
- Perioperative Oral Health Management, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;
| | - Misato Iwatsu
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
| | - Tomoya Sato
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
| | - Ryo Tagaino
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
- Perioperative Oral Health Management, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;
| | - Kenta Shobara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
| | - Yuta Shinohara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
| | - Takanori Hatakeyama
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
| | - Chie Kayaba
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan; (C.K.); (M.S.); (A.T.); (T.S.); (K.A.); (K.I.)
| | - Mariko Sato
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan; (C.K.); (M.S.); (A.T.); (T.S.); (K.A.); (K.I.)
| | - Ayako Tokue
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan; (C.K.); (M.S.); (A.T.); (T.S.); (K.A.); (K.I.)
| | - Tomoko Sugawara
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan; (C.K.); (M.S.); (A.T.); (T.S.); (K.A.); (K.I.)
| | - Kanamai Ashino
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan; (C.K.); (M.S.); (A.T.); (T.S.); (K.A.); (K.I.)
| | - Koji Ikeda
- Department of Development Promotion, Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan; (C.K.); (M.S.); (A.T.); (T.S.); (K.A.); (K.I.)
| | - Jun Aida
- Department of Oral Health Promotion, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan;
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (M.I.); (T.S.); (R.T.); (K.S.); (Y.S.); (T.H.); (K.S.)
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31
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Naganuma Y, Takahashi M, Takada Y, Hoshi K, Kitaoka A, Takahashi A, Sasaki K. Usefulness of conventional glass ionomer cements in an environment of insufficient moisture exclusion. J Oral Sci 2022; 64:242-246. [PMID: 35691887 DOI: 10.2334/josnusd.22-0012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
PURPOSE Moisture exclusion while treating dental caries can be challenging, and the glass ionomer cements (GICs) used for these procedures are susceptible to water. Few studies have examined the effects of the powder/liquid ratio (PLR) on the physical properties of GICs exposed to water. In this study, the hardness and thickness of the water-susceptible surface layer of three GICs were evaluated. METHODS Three conventional GICs were mixed in increasing PLRs, and hardness over time was measured under conditions of no water exposure, distilled water exposure, and saliva exposure. Furthermore, the thickness of the water-susceptible layer for each GIC was determined. RESULTS A water-susceptible layer of approximately 250 μm was evident for all GICs, and the thickness decreased with increasing PLR. GIC hardness increased with increasing PLR in conditions without water for all GIC types. Furthermore, the removal of the water-susceptible layer restored the physical properties of each GIC. CONCLUSION Overall, the results indicate that conventional GIC restoration with the removal of the water-susceptible surface layer is a feasible strategy for treating dental caries in individuals for whom exclusion of moisture can be difficult.
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Affiliation(s)
- Yukihiro Naganuma
- Clinics of Dentistry for Disabled, Tohoku University Hospital, Tohoku University
| | - Masatoshi Takahashi
- Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry
| | - Yukyo Takada
- Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry
| | - Kumi Hoshi
- Clinics of Dentistry for Disabled, Tohoku University Hospital, Tohoku University
| | - Aki Kitaoka
- Clinics of Dentistry for Disabled, Tohoku University Hospital, Tohoku University
| | - Atsushi Takahashi
- Clinics of Dentistry for Disabled, Tohoku University Hospital, Tohoku University
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
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Ueshima E, Sofue K, Takaki H, Hirata Y, Kodama H, Hamada M, Matsushiro K, Sasaki K, Gentsu T, Okada T, Yamaguchi M, Yamakado K, Sugimoto K, Murakami T. Abstract No. 359 Embolization induced tumor-associated macrophage polarization in tumor immune microenvironment can be reprogrammed by lenvatinib in a rat hepatoma model. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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33
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Jain N, Thompson P, Burger J, Ferrajoli A, Takahashi K, Estrov Z, Borthakur G, Bose P, Kadia T, Pemmaraju N, Sasaki K, Konopleva M, Jabbour E, Garg N, Wang X, Kanagal-Shamanna R, Patel K, Wang W, Wang S, Jorgensen J, Lopez W, Ayala A, Plunkett W, Gandhi V, Kantarjian H, O’Brien S, Keating M, Wierda W. S149: LONG TERM OUTCOMES OF IFCG REGIMEN FOR FIRSTLINE TREATMENT OF PATIENTS WITH CLL WITH MUTATED IGHV AND WITHOUT DEL(17P)/TP53 MUTATION. Hemasphere 2022. [DOI: 10.1097/01.hs9.0000843488.43813.af] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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34
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Hara F, Ono M, Kitano S, Nakayama T, Kawabata H, Watanabe K, Sasaki K, Kataoka T, Saji S, Yonemori K, Shien T, Iwata H. 160TiP A randomized controlled phase III study of bevacizumab and paclitaxel in combination with atezolizumab as a treatment for patients with locally advanced or metastatic hormone receptor-positive HER2-negative breast cancer: JCOG1919E/AMBITION study. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.03.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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35
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Sugano T, Ogawa T, Yoda N, Hashimoto T, Shobara K, Niizuma K, Kawashima R, Sasaki K. Morphological comparison of masseter muscle fibers in the mandibular rest and open positions using diffusion tensor imaging. J Oral Rehabil 2022; 49:608-615. [PMID: 35334120 DOI: 10.1111/joor.13319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/22/2022] [Accepted: 03/19/2022] [Indexed: 12/01/2022]
Abstract
BACKGROUND The masseter muscle has a complicated multipennate internal structure and exhibits functional differentiation when performing various stomatognathic functions. It is important to understand the internal structural changes of the muscle during functioning to elucidate characteristic muscle disorders such as local myalgia. Diffusion tensor imaging (DTI) may be useful for investigating the internal structural features of muscle. OBJECTIVES To evaluate the features of masseter muscle fibers in human participants using DTI fiber tractography, and to elucidate the structural differences in the masseter muscle between the mandibular rest and open positions. METHODS Five healthy men (age 31±7 years) underwent DTI and T1-weighted MRI of the right masseter muscle in the mandibular rest and open positions. MR images were used as a reference for muscle layer segmentation (superficial, intermediate, and deep). DTI fiber tractography of the masseter muscle was performed and the orientation of the DTI fibers was analyzed in each layer using coordinates based on the Frankfurt horizontal plane. RESULTS The DTI fiber orientation of the deep layer significantly changed between the mandibular rest and open positions in the frontal plane (p<0.05, Wilcoxon rank sum test). However, no significant change was found in the superficial and intermediate layers. CONCLUSION DTI fiber tractography confirmed regional differences in the orientation change of the masseter muscle fibers between different mandibular positions. The results may support the existence of functional partitioning inside the masseter muscle and suggest that DTI may be useful for the evaluation of muscle fibers in multipennate muscles.
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Affiliation(s)
- Takehiko Sugano
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Japan
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Japan
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Japan
| | - Teruo Hashimoto
- Institute of Development, Aging and Cancer, Tohoku University, Japan
| | - Kenta Shobara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Japan
| | - Kuniyasu Niizuma
- Department of Neurosurgical Engineering and Translational Neuroscience, Graduate School of Biomedical Engineering, Tohoku University, Japan.,Department of Neurosurgical Engineering and Translational Neuroscience, Tohoku University Graduate School of Medicine, Japan.,Department of Neurosurgery, Tohoku University Graduate School of Medicine, Japan
| | - Ryuta Kawashima
- Institute of Development, Aging and Cancer, Tohoku University, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Japan
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36
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Yokoyama-Sato Y, Nishioka T, Naganuma Y, Takahashi M, Nakagawa A, Yoda N, Sasaki K, Takahashi N, Tominaga T, Iikubo M. Effectiveness of an actuator-driven pulsed water jet for removal of softened carious dentin. Dent Mater J 2022; 41:527-533. [PMID: 35264543 DOI: 10.4012/dmj.2021-234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of this study was to assess the utility of an actuator-driven pulsed water jet (ADPJ) as a hardness-dependent carious dentin removal device by using different outputs. Thirty-six plane surface dental caries samples were treated with the ADPJ at 150, 200, and 250 voltage (12 teeth each). The Knoop hardness number (KHN) and Ca/P mass ratio were measured at 70 μm from the deepest point of the removing groove. Furthermore, three other teeth samples were manually treated with the ADPJ at the three above mentioned voltages (one tooth each) for 1 min. The KHN and Ca/P mass ratio were measured at 70 μm from the surface of the residual dentin part. In both the KHN and Ca/P mass ratio, higher residual dentin depended on the applied voltage of ADPJ. The ADPJ enabled the removal of softened carious dentin in an applied voltage-dependent manner.
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Affiliation(s)
- Yuka Yokoyama-Sato
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry
| | - Takashi Nishioka
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry
| | | | - Masatoshi Takahashi
- Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry
| | - Atsuhiro Nakagawa
- Department of Neurosurgery, Tohoku University Graduate School of Medicine
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Nobuhiro Takahashi
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry
| | - Teiji Tominaga
- Department of Neurosurgery, Tohoku University Graduate School of Medicine
| | - Masahiro Iikubo
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry
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Suenaga H, Aida J, Kumasaka A, Shibamoto A, Sato S, Shinohara Y, Hatakeyama T, Yamaguchi H, Sasaki K, Takahashi T, Koseki T, Peck C, Iikubo M. Impact of Dental Referral Prior to Elective Surgery on Postoperative Outcomes. J Am Med Dir Assoc 2022; 23:638-645.e2. [PMID: 35219603 DOI: 10.1016/j.jamda.2022.01.071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 12/26/2022]
Abstract
OBJECTIVES Oral bacteria may contribute to postoperative infectious complications including postoperative pneumonia or surgical site infection. The aim of this study was to investigate the impact of preoperative dental care on postoperative outcomes among surgical patients under general anesthesia. DESIGN Retrospective cohort study. SETTING AND PARTICIPANTS We analyzed clinical records of major surgical patients at a university hospital between 2016 and 2018. Subjects were categorized into either the preoperative dental care group, those being referred to dentists by their surgeons based on an individual surgeon's judgment for dental care before surgery, or the control group. METHODS The primary outcome was postoperative infectious complications. Secondary outcomes were postoperative inflammation markers (C-reactive protein and fever), and economic outcomes (postoperative length of hospital stay and medical expenses). As the main analysis, the average treatment effects of the preoperative dental care were obtained from the augmented inverse-probability weighting (AIPW) method with consideration of demographics and perioperative risk factors to estimate causal effect of the intervention from the observational data. Then, stratified analyses by age and surgical sites were conducted with the inverse-probability weighting and linear regression methods, respectively. RESULTS In the AIPW estimation, compared with the control group, the care group saw a significantly lower rate of postoperative infection (average treatment effect -3.02) and shorter fever duration (-2.79 days). The stratified analysis by age revealed significant positive impact of dental care in all age groups, including the highest treatment effects observed among patients younger than 60. Also, treatment effect was observed in wider surgical sites than previously known. CONCLUSION/IMPLICATIONS This study indicates a significant impact of preoperative dental care on preventing postoperative infection and inflammation. Along with old age or certain types of surgeries in which advantages of dental referral have been already known, preoperative dental referral could be beneficial for broader types of patients.
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Affiliation(s)
- Hanako Suenaga
- The University of Sydney School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Level 2 Westmead Centre for Oral Health, Westmead, NSW, Australia; Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Jun Aida
- Department of Oral Health Promotion, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan; Division for Regional Community Development, Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Akira Kumasaka
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan; Division of Perioperative Oral Health Management, Tohoku University Hospital, Aoba-ku, Sendai, Japan
| | - Aya Shibamoto
- The University of Sydney School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Level 2 Westmead Centre for Oral Health, Westmead, NSW, Australia; Division of Perioperative Oral Health Management, Tohoku University Hospital, Aoba-ku, Sendai, Japan
| | - Satoko Sato
- The University of Sydney School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Level 2 Westmead Centre for Oral Health, Westmead, NSW, Australia; Division of Perioperative Oral Health Management, Tohoku University Hospital, Aoba-ku, Sendai, Japan; Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Yuta Shinohara
- The University of Sydney School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Level 2 Westmead Centre for Oral Health, Westmead, NSW, Australia
| | - Takenori Hatakeyama
- The University of Sydney School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Level 2 Westmead Centre for Oral Health, Westmead, NSW, Australia
| | - Hirofumi Yamaguchi
- The University of Sydney School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Level 2 Westmead Centre for Oral Health, Westmead, NSW, Australia
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial surgery, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Takeyoshi Koseki
- Division of Perioperative Oral Health Management, Tohoku University Hospital, Aoba-ku, Sendai, Japan; Division of Preventive Dentistry, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Chris Peck
- Faculty of Medicine and Health, The University of Sydney, Level 2 Westmead Centre for Oral Health, Westmead, NSW, Australia
| | - Masahiro Iikubo
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan; Division of Perioperative Oral Health Management, Tohoku University Hospital, Aoba-ku, Sendai, Japan.
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El-Husseiny HM, Mady EA, Shimada K, Hamabe L, Yoshida T, Ma D, Mandour AS, Hendawy H, Sasaki K, Fukuzumi S, Watanabe M, Hirose M, Mizuki H, Takahashi K, Tanaka R. Intraventricular pressure gradient: a promising tool to predict the post-infarction chronic congestive heart failure in rats. Eur Heart J Cardiovasc Imaging 2022. [DOI: 10.1093/ehjci/jeab289.390] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background/Introduction: Congestive heart failure (CHF), the main reason for morbidity and mortality, is considered a serious consequence of myocardial infarction (MI). The use of left ventricular end-diastolic pressure (LVEDP) as a chief indicator of CHF becomes limited because of the possible impairment of cardiac function and induced aortic valve damage during its recording. Echocardiography is the gold standard approach to diagnose structural myocardial dysfunction. However, its ability to predict chronic CHF following MI is still limited. Recently, intraventricular pressure gradient (IVPG) was presented as a non-invasive, highly sensitive preload-independent diastolic function parameter to assess cardiac function, especially during cardiomyopathy. However, there have not been any investigations demonstrating the feasibility of IVPG in the evaluation of post-infarction chronic CHF.
Purpose
This study aimed to investigate the utility of IVPG to assess the heart function in a rat model with chronic CHF following MI with evaluating its capacity to predict these changes.
Methods
Fifty male rats were included. MI was induced via ligation of the left anterior descending artery (LAD) at the level of the atrioventricular junction (MI animals, n = 35). Sham animals were subjected to the same left thoracotomy procedure without LAD ligation (Sham animals, n = 15). Transthoracic conventional echocardiography and colour M-mode echocardiography (CMME) for IVPG were performed in all animals 6 months post-surgery. The next day, animals were anesthetized, ventilated, and euthanized after the recording of hemodynamics. The heart weight, and lung and liver wet-to-dry weight ratios were recorded. J-tree cluster-analysis was performed based on ten echocardiographic variables indicative of CHF.
Results
Based on the cluster analysis, animals were joined into two clusters; CHF+ (n = 22) and named MI/HF+, and CHF- (n = 28) that was joined from sham (n = 15), and MI/HF- (n = 13). MI/HF+ presented the most severe anatomical and echocardiographic changes indicative of CHF with significant reduction of all IVPG indices and impairment of the hemodynamics. The IVPG indices were significantly (P< 0.0001) correlated with the anatomical and echocardiographic findings, LVDP, LVEDP, HR, -dP/dtmin, and Tau. Meanwhile, LVSP was only significantly correlated with apical IVPG (R = 0.677, P = 0.022). dP/dtmax was significantly correlated with total IVPG, basal IVPG, and apical IVPG (R = 0.797, P = 0.017, R = 0.724, P = 0.003, and R = 0.652, P = 0.026 ; respectively). Moreover, total, basal, mid-to-apical, mid-, and apical IVPG were significant (P< 0.0001) predictors of chronic CHF following MI.
Conclusion
Compared to the structural, and functional indices of conventional echocardiography, IVPG derived from CMME could provide a substantial non-invasive tool to diagnose and predict CHF after long-term MI.
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Affiliation(s)
- HM El-Husseiny
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - EA Mady
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - K Shimada
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - L Hamabe
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - T Yoshida
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - D Ma
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - AS Mandour
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - H Hendawy
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - K Sasaki
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - S Fukuzumi
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - M Watanabe
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - M Hirose
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - H Mizuki
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
| | - K Takahashi
- Juntendo University Graduate School of Medicine, Department of Pediatrics and Adolescent Medicine, Tokyo, Japan
| | - R Tanaka
- Tokyo university of agriculture and technology, Fuchu, Tokyo, Japan
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Yoda N, Abe Y, Suenaga Y, Matsudate Y, Hoshino T, Sugano T, Nakamura K, Okino A, Sasaki K. Resin Cement-Zirconia Bond Strengthening by Exposure to Low-Temperature Atmospheric Pressure Multi-Gas Plasma. Materials (Basel) 2022; 15:ma15020631. [PMID: 35057349 PMCID: PMC8778450 DOI: 10.3390/ma15020631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 12/10/2022]
Abstract
The purpose of this study was to investigate the effect of gas species used for low-temperature atmospheric pressure plasma surface treatment, using various gas species and different treatment times, on zirconia surface state and the bond strength between zirconia and dental resin cement. Three groups of zirconia specimens with different surface treatments were prepared as follows: untreated group, alumina sandblasting treatment group, and plasma treatment group. Nitrogen (N2), carbon dioxide (CO2), oxygen (O2), argon (Ar), and air were employed for plasma irradiation. The bond strength between each zirconia specimen and resin cement was compared using a tension test. The effect of the gas species for plasma irradiation on the zirconia surface was investigated using a contact angle meter, an optical interferometer, an X-ray diffractometer, and X-ray photoelectric spectroscopy. Plasma irradiation increased the wettability and decreased the carbon contamination on the zirconia surface, whereas it did not affect the surface topography and crystalline phase. The bond strength varied depending on the gas species and irradiation time. Plasma treatment with N2 gas significantly increased bond strength compared to the untreated group and showed a high bond strength equivalent to that of the sandblasting treatment group. The removal of carbon contamination from the zirconia surface and an increase in the percentage of Zr-O2 on the zirconia surface by plasma irradiation might increase bond strength.
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Affiliation(s)
- Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
- Correspondence: ; Tel.: +81-22-717-8369
| | - Yuri Abe
- FIRST, Tokyo Institute of Technology, Yokohama 226-8502, Japan; (Y.A.); (Y.S.); (A.O.)
| | - Yuma Suenaga
- FIRST, Tokyo Institute of Technology, Yokohama 226-8502, Japan; (Y.A.); (Y.S.); (A.O.)
| | - Yoshiki Matsudate
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
| | - Tomohiro Hoshino
- Joint Research Department of Next-Generation Dental Material Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Takehiko Sugano
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
| | - Keisuke Nakamura
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Akitoshi Okino
- FIRST, Tokyo Institute of Technology, Yokohama 226-8502, Japan; (Y.A.); (Y.S.); (A.O.)
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.M.); (T.S.); (K.S.)
- Joint Research Department of Next-Generation Dental Material Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
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Sugano T, Yoda N, Ogawa T, Hashimoto T, Shobara K, Niizuma K, Kawashima R, Sasaki K. Application of Diffusion Tensor Imaging Fiber Tractography for Human Masseter Muscle. TOHOKU J EXP MED 2022; 256:151-160. [DOI: 10.1620/tjem.256.151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Takehiko Sugano
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Toru Ogawa
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Teruo Hashimoto
- Institute of Development, Aging and Cancer, Tohoku University
| | - Kenta Shobara
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Kuniyasu Niizuma
- Department of Neurosurgical Engineering and Translational Neuroscience, Graduate School of Biomedical Engineering, Tohoku University
| | - Ryuta Kawashima
- Institute of Development, Aging and Cancer, Tohoku University
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
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Kimura-Ono A, Maekawa K, Kuboki T, Nawachi K, Fujisawa M, Sato H, Aita H, Koyama S, Hideshima M, Sato Y, Wake H, Nagao K, Kodaira-Ueda Y, Tamaki K, Sadamori S, Tsuga K, Nishi Y, Sawase T, Koshino H, Masumi SI, Sakurai K, Ishibashi K, Ohyama T, Akagawa Y, Hirai T, Sasaki K, Koyano K, Yatani H, Matsumura H, Ichikawa T, Ohkawa S, Baba K. Prosthodontic treatment can improve the ingestible food profile in Japanese adult outpatients. J Prosthodont Res 2022; 67:189-195. [PMID: 35644569 DOI: 10.2186/jpr.jpr_d_22_00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To investigate the effect of prosthodontic treatment on the ingestible food profile in adult Japanese outpatients, and to identify the related risk factors that can deteriorate the profile. METHODS The participants were 277 outpatients who visited university-based specialty clinics in Japan for prosthodontic treatment. The demographic data, number of present teeth assessed via intraoral examination, and oral health-related quality of life assessed by the total Oral Health Impact Profile (OHIP-J54) scores of all participants were recorded before treatment. Ingestible food profile score (IFS) was recorded using a validated food intake questionnaire. Eligible participants who answered the questionnaire before and after treatment were categorized into five groups based on the prosthodontic treatments they received (i.e., crowns, bridges, removable partial dentures, removable complete dentures, and removable complete and partial dentures). RESULTS Multivariate analysis of covariance revealed a statistically significant main effect of prosthodontic intervention (time course: before and after treatment) on mean IFS (P=0.035, F=4.526), even after adjusting for covariates (age, number of present teeth, and treatment modality). Multiple linear regression analysis revealed that the low number of present teeth (r=0.427, P<0.001) and a high OHIP-J54 total score (r=-0.519, P<0.001) of the patients at the baseline were significantly associated with their baseline IFSs, even after adjusting for confounding variables. CONCLUSIONS The findings of this multicenter follow-up study indicate the importance of prosthodontic rehabilitation in improving patients' ingestible food profiles.
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Affiliation(s)
- Aya Kimura-Ono
- Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama, Japan
| | - Kenji Maekawa
- Okayama University Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Takuo Kuboki
- Okayama University Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Kumiko Nawachi
- Okayama University Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | | | - Hironobu Sato
- Fukuoka Dental College Graduate School of Dental Science, Japan
| | - Hideki Aita
- Health Sciences University of Hokkaido School of Dentistry, Japan
| | | | - Masayuki Hideshima
- Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, Japan
| | - Yuji Sato
- Showa University School of Dentistry, Japan
| | - Hiroyuki Wake
- Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, Japan
| | - Kan Nagao
- Tokushima University Graduate School of Biomedical Sciences, Japan
| | | | | | - Shinsuke Sadamori
- Ministry of Health, Labour, and Welfare, Chugoku-Shikoku Regional Bureau of Health and Welfare, Japan
| | - Kazuhiro Tsuga
- Hiroshima University Graduate School of Biomedical and Health Sciences, Japan
| | - Yasuhiro Nishi
- Kagoshima University Graduate School of Medical and Dental Sciences, Japan
| | - Takashi Sawase
- Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Hisashi Koshino
- Health Sciences University of Hokkaido School of Dentistry, Japan
| | | | | | | | - Takashi Ohyama
- Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, Japan
| | - Yasumasa Akagawa
- Hiroshima University Graduate School of Biomedical and Health Sciences, Japan
| | - Toshihiro Hirai
- Health Sciences University of Hokkaido School of Dentistry, Japan
| | | | | | | | | | - Tetsuo Ichikawa
- Tokushima University Graduate School of Biomedical Sciences, Japan
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Putra RH, Doi C, Yoda N, Astuti ER, Sasaki K. Current applications and development of artificial intelligence for digital dental radiography. Dentomaxillofac Radiol 2022; 51:20210197. [PMID: 34233515 PMCID: PMC8693331 DOI: 10.1259/dmfr.20210197] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
In the last few years, artificial intelligence (AI) research has been rapidly developing and emerging in the field of dental and maxillofacial radiology. Dental radiography, which is commonly used in daily practices, provides an incredibly rich resource for AI development and attracted many researchers to develop its application for various purposes. This study reviewed the applicability of AI for dental radiography from the current studies. Online searches on PubMed and IEEE Xplore databases, up to December 2020, and subsequent manual searches were performed. Then, we categorized the application of AI according to similarity of the following purposes: diagnosis of dental caries, periapical pathologies, and periodontal bone loss; cyst and tumor classification; cephalometric analysis; screening of osteoporosis; tooth recognition and forensic odontology; dental implant system recognition; and image quality enhancement. Current development of AI methodology in each aforementioned application were subsequently discussed. Although most of the reviewed studies demonstrated a great potential of AI application for dental radiography, further development is still needed before implementation in clinical routine due to several challenges and limitations, such as lack of datasets size justification and unstandardized reporting format. Considering the current limitations and challenges, future AI research in dental radiography should follow standardized reporting formats in order to align the research designs and enhance the impact of AI development globally.
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Affiliation(s)
| | - Chiaki Doi
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4–1 Seiryo-machi, Sendai, Japan
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4–1 Seiryo-machi, Sendai, Japan
| | - Eha Renwi Astuti
- Department of Dentomaxillofacial Radiology, Faculty of Dental Medicine, Universitas Airlangga, Jl. Mayjen Prof. Dr. Moestopo no 47, Surabaya, Indonesia
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4–1 Seiryo-machi, Sendai, Japan
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Shanmugam M, Chuaicham C, Augustin A, Sagayaraj PJJ, Sasaki K, Sekar K. Upcycling of Hazardous Metals and PET Waste derived Metal-Organic Frameworks: A Review in Recent Progress and Prospects. NEW J CHEM 2022. [DOI: 10.1039/d2nj02481k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An intense increase in non-biodegradable plastics and waste metals is an immediate threat to the world and needs to be addressed urgently. There are several strategies deployed to control, eliminate,...
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Koyama S, Izumita K, Sato N, Tagaino R, Hatakeyama T, Shiraishi N, Yoda N, Igarashi K, Takahashi T, Sasaki K. Medical-Dental Collaboration and Interprofessional Training for Maxillofacial Diseases at Tohoku University Hospital. TOHOKU J EXP MED 2022; 256:225-234. [DOI: 10.1620/tjem.256.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Shigeto Koyama
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital
| | - Kuniyuki Izumita
- Perioperative Oral Health Management, Tohoku University Hospital
| | - Naoko Sato
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital
| | - Ryo Tagaino
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital
| | | | - Naru Shiraishi
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Nobuhiro Yoda
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
| | - Kaoru Igarashi
- Division of Craniofacial Anomalies, Tohoku University Graduate School of Dentistry
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry
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Nogami S, Yamauchi K, Izumita K, Kitamura J, Takeda Y, Otake Y, Koyama S, Okuyama K, Sasaki K, Takahashi T. Clinical course of masticatory function recovery following arthrocentesis in patients with unilateral mandibular condyle head fracture. J Craniomaxillofac Surg 2021; 50:225-229. [PMID: 34930666 DOI: 10.1016/j.jcms.2021.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 12/01/2021] [Accepted: 12/10/2021] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to investigate the clinical course of masticatory function recovery following arthrocentesis. Patients with a unilateral condylar head fracture who underwent arthrocentesis for therapeutic reasons were evaluated and compared with patients with a unilateral condylar head fracture who did not undergo arthrocentesis. At 3 months after treatment, the occlusal contact area and maximum bite force in patients with a fracture treated with arthrocentesis were greater than in those who did not receive arthrocentesis at the same time points, although the differences were not significant. Moreover, at 1 and 3 months following arthrocentesis, mean (±SD) occlusal contact area (1 month: 1.99 ± 0.55 mm2, p = 0.01; 3 months: 2.90 ± 1.36 mm2, p = 0.03) and maximum bite force (1 month: 82.45 ± 15.04 N, p = 0.01; 3 months: 101.11 ± 14.53 N, p = 0.01) on the fractured side in patients who underwent that treatment were significantly reduced when compared with those on the non-fractured side. The authors conclude that if the priority is to avoid open reduction and internal fixation, then the arthrocentesis approach might be a less invasive alternative, albeit with the price of a prolonged healing interval.
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Affiliation(s)
- Shinnosuke Nogami
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan.
| | - Kensuke Yamauchi
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Kuniyuki Izumita
- Joint Research Department of Next-Generation Dental Materials Engineering, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Jun Kitamura
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Yuri Takeda
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Yoshio Otake
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Shinki Koyama
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Kyosuke Okuyama
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Miyagi, Japan
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Hagino H, Sugimoto T, Tanaka S, Sasaki K, Sone T, Nakamura T, Soen S, Mori S. A randomized, controlled trial of once-weekly teriparatide injection versus alendronate in patients at high risk of osteoporotic fracture: primary results of the Japanese Osteoporosis Intervention Trial-05. Osteoporos Int 2021; 32:2301-2311. [PMID: 34002252 PMCID: PMC8563544 DOI: 10.1007/s00198-021-05996-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 05/05/2021] [Indexed: 11/10/2022]
Abstract
UNLABELLED In this randomized, controlled trial, treatment with once-weekly subcutaneous injection of teriparatide for 72 weeks was found to be associated with a significant reduction in the incidence of morphometric vertebral fractures compared with alendronate in women with primary osteoporosis who were at high risk of fracture. INTRODUCTION To determine whether the anti-fracture efficacy of teriparatide is superior to that of alendronate, a prospective, randomized, open-label, blinded-endpoint trial was performed. METHODS Japanese women aged at least 75 years were eligible for the study if they had primary osteoporosis and were at high risk of fracture. Patients were randomly assigned in a 1:1 ratio to receive sequential therapy (once-weekly subcutaneous injection of teriparatide 56.5 μg for 72 weeks followed by alendronate for 48 weeks) or monotherapy with alendronate for 120 weeks. The primary endpoint was the incidence of morphometric vertebral fractures at 72 weeks (at the end of teriparatide treatment). RESULTS Between October 2014 and December 2017, 1011 patients (505 in the teriparatide group and 506 in the alendronate group) were enrolled. Of these, 778 patients (351 and 427, respectively) were included in the primary analysis. The incidence of morphometric vertebral fractures was significantly lower in the teriparatide group (56 per 419.9 person-years, annual incidence rate 0.1334) than in the alendronate group (96 per 553.6 person-years, annual incidence rate 0.1734), with a rate ratio of 0.78 (95% confidence interval 0.61 to 0.99, P = 0.04). In both groups, adverse events were most frequently reported in the following system organ classes: infections and infestations, gastrointestinal disorders, and musculoskeletal and connective tissue disorders. CONCLUSION Once-weekly subcutaneous injection of teriparatide significantly reduced the incidence of morphometric vertebral fractures compared with alendronate in women with primary osteoporosis who were at high risk of fracture. TRIAL REGISTRATION jRCTs031180235 and UMIN000015573, March 12, 2019.
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Affiliation(s)
- H. Hagino
- grid.265107.70000 0001 0663 5064School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - T. Sugimoto
- Eikokai Ono Hospital, 973 Tenjin-cho, Ono, Hyogo Japan
| | - S. Tanaka
- grid.258799.80000 0004 0372 2033Department of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - K. Sasaki
- grid.258799.80000 0004 0372 2033Department of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - T. Sone
- grid.415086.e0000 0001 1014 2000Department of Nuclear Medicine, Kawasaki Medical School, Kurashiki, Okayama Japan
| | | | - S. Soen
- Soen Orthopaedics, Osteoporosis and Rheumatology Clinic, Kobe, Hyogo Japan
| | - S. Mori
- grid.415466.40000 0004 0377 8408Bone and Joint Surgery, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
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Shinohara Y, Washio J, Kobayashi Y, Abiko Y, Sasaki K, Takahashi N. Hypoxically cultured cells of oral squamous cell carcinoma increased their glucose metabolic activity under normoxic conditions. PLoS One 2021; 16:e0254966. [PMID: 34679081 PMCID: PMC8535375 DOI: 10.1371/journal.pone.0254966] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/07/2021] [Indexed: 12/24/2022] Open
Abstract
Objective The oxygen concentration within cancer tissue is known to be low, but is expected to increase rapidly when oxygen is supplied by angiogenesis and hematogenous metastasis, suggesting that rapid increases in oxygen levels might influence cancer cell physiology. Therefore, we investigated the effects of oxygen concentration fluctuations on the glucose metabolism of cancer cells. Methods The glucose metabolism of oral squamous cell carcinoma (HSC-2 and HSC-3) and normal epithelial (HaCaT) cells cultured under normoxic (21% oxygen) or hypoxic (1% oxygen) conditions was measured using a pH-stat system under normoxic or hypoxic conditions. The acidic end-products and reactive oxygen species (ROS) generated by glucose metabolism were also measured. Results Under normoxic conditions, the metabolic activity of hypoxically cultured cancer cells was significantly increased, and the production of acids other than lactate was upregulated, while the normal cells did not respond to rapid increases in oxygen levels. ROS production was higher in normoxic conditions in all cells, especially the hypoxically cultured HSC-3 cells. Conclusions Rapid increases in oxygen levels might enhance the glucose metabolism of hypoxically cultured cancer cells by mainly activating the TCA cycle and electron transport system, which might activate cancer cells through the ATP and ROS generation.
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Affiliation(s)
- Yuta Shinohara
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Jumpei Washio
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yuri Kobayashi
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yuki Abiko
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Nobuhiro Takahashi
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
- * E-mail:
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Xiao L, Shiwaku Y, Hamai R, Tsuchiya K, Sasaki K, Suzuki O. Macrophage Polarization Related to Crystal Phases of Calcium Phosphate Biomaterials. Int J Mol Sci 2021; 22:ijms222011252. [PMID: 34681912 PMCID: PMC8538944 DOI: 10.3390/ijms222011252] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/27/2021] [Accepted: 10/11/2021] [Indexed: 11/16/2022] Open
Abstract
Calcium phosphate (CaP) materials influence macrophage polarization during bone healing. However, the effect of the crystal phase of CaP materials on the immune response of bone remains unclear. In this study, the effect of the crystal phases of CaP materials on the regulation of macrophage polarization was investigated. Human THP-1 cells and mouse RAW 264 cells were cultured with octacalcium phosphate (OCP) and its hydrolyzed form Ca-deficient hydroxyapatite to assess the expression of pro-inflammatory M1 and anti-inflammatory M2 macrophage-related genes. OCP inhibited the excessive inflammatory response and switched macrophages to the anti-inflammatory M2 phenotype, which promoted the expression of the interleukin 10 (IL10) gene. In contrast, HL stimulated an excessive inflammatory response by promoting the expression of pro-inflammatory M1 macrophage-related genes. To observe changes in the microenvironment induced by OCP and HL, inorganic phosphate (Pi) and calcium ion (Ca2+) concentrations and pH value in the medium were measured. The expression of the pro-inflammatory M1 macrophage-related genes (tumor necrosis factor alpha (TNFα) and interlukin 1beta (IL1β)) was closely related to the increase in ion concentration caused by the increase in the CaP dose. Together, these results suggest that the microenvironment caused by the crystal phase of CaP materials may be involved in the immune-regulation capacity of CaP materials.
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Affiliation(s)
- Linghao Xiao
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
- Correspondence:
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Hagino H, Sugimoto T, Tanaka S, Sasaki K, Sone T, Nakamura T, Soen S, Mori S. Correction to: A randomized, controlled trial of once-weekly teriparatide injection versus alendronate in patients at high risk of osteoporotic fracture: primary results of the Japanese osteoporosis intervention Trial-05. Osteoporos Int 2021; 32:2143. [PMID: 34448885 PMCID: PMC9172857 DOI: 10.1007/s00198-021-06066-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- H. Hagino
- grid.265107.70000 0001 0663 5064School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - T. Sugimoto
- Eikokai Ono Hospital, 973 Tenjin-cho, Ono, Hyogo Japan
| | - S. Tanaka
- grid.258799.80000 0004 0372 2033Department of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - K. Sasaki
- grid.258799.80000 0004 0372 2033Department of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - T. Sone
- grid.415086.e0000 0001 1014 2000Department of Nuclear Medicine, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | | | - S. Soen
- Soen Orthopaedics, Osteoporosis and Rheumatology Clinic, Kobe, Hyogo Japan
| | - S. Mori
- grid.415466.40000 0004 0377 8408Bone and Joint Surgery, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka Japan
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Kuniyuki I, Hisaoka T, Ikeda R, Suzuki J, Sato N, Tagaino R, Kambayashi T, Hirano-Kawamoto A, Ohta J, Ohkoshi A, Ishii R, Shitraishi N, Kato K, Koyama S, Sasaki K, Katori Y. Changes in tongue pressure and dysphagia at oral cancer patients by palatal augmentation prosthesis. Cancer Rep (Hoboken) 2021; 5:e1516. [PMID: 34472726 PMCID: PMC9327658 DOI: 10.1002/cnr2.1516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/31/2021] [Accepted: 07/07/2021] [Indexed: 11/30/2022] Open
Abstract
Background The palatal augmentation prosthesis (PAP) is an intraoral prosthesis used in the treatment of dysphagia. Aim The objective of the study is to examine the effect of PAP using tongue pressure and the Videofluoroscopic Dysphagia Scale (VDS) to understand the precise mechanism for improvement in swallowing function with PAP for oral cancer at retrospective survey. Methods and results Fifteen patients were provided PAPs. Tongue pressure and VDS were evaluated with and without PAP. After intervention with PAP, tongue pressure significantly increased as compared to when without PAP (p < .05). The total mean VDS score with PAP was found to have significantly improved (p < .05). The mean VDS score of the oral phase also significantly improved with the PAP compared to without the PAP group (p < .05). Significant differences (p < .01) were found in each category, such as tongue to palate contact and pyriform sinus residue. Conclusion PAP can improve tongue pressure, tongue to palate contact, and pyriform sinus residue.
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Affiliation(s)
- Izumita Kuniyuki
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital, Sendai, Japan
| | - Takuma Hisaoka
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ryoukichi Ikeda
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Jun Suzuki
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naoko Sato
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital, Sendai, Japan
| | - Ryo Tagaino
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital, Sendai, Japan
| | - Tomonori Kambayashi
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ai Hirano-Kawamoto
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Jun Ohta
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Ohkoshi
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ryo Ishii
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naru Shitraishi
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Kengo Kato
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shigeto Koyama
- Maxillofacial Prosthetics Clinic, Tohoku University Hospital, Sendai, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Yukio Katori
- Department of Otolaryngology and Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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