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Mansour MM, Moussa SM, Meheissen MA, Aboelseoud MR. Bacterial sealing ability of calcium silicate-based sealer for endodontic surgery: an in-vitro study. BMC Oral Health 2024; 24:584. [PMID: 38773504 DOI: 10.1186/s12903-024-04309-3] [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: 01/13/2024] [Accepted: 04/29/2024] [Indexed: 05/23/2024] Open
Abstract
BACKGROUND Apical surgery with standard retrograde maneuvers may be challenging in certain cases. Simplifying apical surgery to reduce operating time and streamline retrograde manipulation is an emerging need in clinical endodontics. AIM OF THE STUDY The aim of the study was to compare the bacterial sealing ability of a calcium silicate-based sealer with the single cone technique combined with root end resection only, and calcium silicate-based sealer as a retrograde filling versus MTA retrofilling, and to analyze bacterial viability using confocal laser scanning microscope (CLSM). MATERIALS AND METHODS In this in vitro experimental study, 50 extracted human maxillary incisor teeth were instrumented and randomly divided into five groups: three experimental groups, a positive control group, and a negative control group (n = 10/group). In the experimental groups, the roots were obturated using the single cone technique (SCT) and a calcium silicate-based sealer. In group 1, the roots were resected 3 mm from the apex with no further retrograde preparation or filling. In groups 2 and 3, the roots were resected, retroprepared, and retrofilled with either a calcium silicate-based sealer or MTA, respectively. Group 4 (positive control) was filled with a single gutta-percha cone without any sealer. In group 5 (negative control), the canals were left empty, and the roots were sealed with wax and nail varnish. A bacterial leakage model using Enterococcus faecalis was employed to assess the sealing ability over a 30-day period, checking for turbidity and analyzing colony forming units (CFUs) per milliliter. Five specimens from each group were examined using CLSM for bacterial viability. Data for the bacterial sealing ability were statistically analyzed using chi-squared and Kruskal-Wallis tests. RESULTS The three experimental groups did not show significant differences in terms of bacterial leakage, or bacterial counts (CFUs) (P > 0.05). However, significant differences were observed when comparing the experimental groups to the positive control group. Notably, the calcium silicate-based sealer, when used as a retrofilling, yielded the best sealing ability. CLSM imaging revealed viable bacterial penetration in all the positive control group specimens while for the experimental groups, dead bacteria was the prominent feature seen. CONCLUSION Within the limitations of this study, it could be concluded that the bacterial sealing ability of calcium silicate-based sealer with the single cone technique combined with root end resection only and calcium silicate-based sealer as a retrograde filling were comparable with MTA retrofilling during endodontic surgical procedures.
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Affiliation(s)
- Mai M Mansour
- Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, 21527, Egypt.
| | - Sybel M Moussa
- Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, 21527, Egypt
| | - Marwa A Meheissen
- DMedical Microbiology & Immunology, Faculty of Medicine, Alexandria University, Alexandria, 21527, Egypt
| | - Mahmoud R Aboelseoud
- Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, 21527, Egypt
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Abdelwahab DH, Kabil NS, Badran AS, Darwish D, Abd El Geleel OM. One-year radiographic and clinical performance of bioactive materials in primary molar pulpotomy: A randomized controlled trial. J Dent 2024; 143:104864. [PMID: 38281619 DOI: 10.1016/j.jdent.2024.104864] [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: 12/16/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 01/30/2024] Open
Abstract
OBJECTIVES Mineral Trioxide Aggregate (MTA) is considered the gold standard material for pulpotomy procedures. However, some drawbacks such as poor handling and long setting time are challenging when it is used as pulpotomy dressing in primary molars in children. Hence, the purpose of this study was to compare the radiographic and clinical performance of a premixed, fast setting bioceramic root repair material (BC RRM-F) with MTA in vital pulpotomy procedures of primary molars, with or without the added seal of a stainless steel crown (SSC). METHODS In this double blinded, four-arm, parallel group randomized contolled trial (RCT), 64 primary molars were randomly allocated to one of the four treatment groups: MTA (PDTM MTA WHITE)+SSC, MTA+GI (bulk fill glass ionomer with glass hybrid technology GC EQUIA Forte® HT), BC RRM-F+GI and BC RRM-F+SCC. All molars were evaluated clinically and radiographically according to the modified Zurn and Seale criteria at 1, 3, 6, and 12 months follow up. Multivariate cox regression models and Kaplan-Meier curves were used for survival analysis. RESULTS There was no statistically significant difference between the success of both pulp capping materials used. Overall survival analysis showed that using GI instead of SCC as a final restorative material was significantly associated with increased risk of failure. CONCLUSIONS TotalFill® BC RRM™ Fast Set Putty can be used as an alternative to MTA in primary molar pulpotomy. Regardless of the pulp capping material, one year survival of pulpotomized primary molars restored with SSC is higher compared to those restored with GC EQUIA Forte® HT. CLINICAL SIGNIFICANCE Clinicians' preference and cost effectiveness may justify the use of either material in primary molar pulpotomy. Parents insisting on tooth-colored restorations for their children's pulpotomized teeth cannot be told that the expectation for success is the same as those restored with SSC, even if calcium silicate-based pulp capping materials are used.
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Affiliation(s)
- Dina Hisham Abdelwahab
- Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Ain Shams University, Egypt.
| | - Noha Samir Kabil
- Pediatric Dentistry and Dental Public Health Department, Faculty of Dentistry, Ain Shams University, Egypt
| | - Amira Saad Badran
- Pediatric Dentistry and Dental Public Health Department, Faculty of Dentistry, Ain Shams University, Egypt
| | - Dina Darwish
- Pediatric Dentistry and Dental Public Health Department, Faculty of Dentistry, Ain Shams University, Egypt
| | - Ola Mohamed Abd El Geleel
- Pediatric Dentistry and Dental Public Health Department, Faculty of Dentistry, Ain Shams University, Egypt
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Kalash A, Tsamesidis I, Pouroutzidou GK, Kontonasaki E, Gkiliopoulos D, Arhakis A, Arapostathis KN, Theocharidou A. Effect of Modified Bioceramic Mineral Trioxide Aggregate Cement with Mesoporous Nanoparticles on Human Gingival Fibroblasts. Curr Issues Mol Biol 2024; 46:3005-3021. [PMID: 38666918 PMCID: PMC11048828 DOI: 10.3390/cimb46040188] [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: 02/10/2024] [Revised: 03/13/2024] [Accepted: 03/20/2024] [Indexed: 04/28/2024] Open
Abstract
The ion doping of mesoporous silica nanoparticles (MSNs) has played an important role in revolutionizing several materials applied in medicine and dentistry by enhancing their antibacterial and regenerative properties. Mineral trioxide aggregate (MTA) is a dental material widely used in vital pulp therapies with high success rates. The aim of this study was to investigate the effect of the modification of MTA with cerium (Ce)- or calcium (Ca)-doped MSNs on the biological behavior of human gingival fibroblasts (hGFs). MSNs were synthesized via sol-gel, doped with Ce and Ca ions, and mixed with MTA at three ratios each. Powder specimens were characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Biocompatibility was evaluated using a 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide (MTT) assay following hGFs' incubation in serial dilutions of material eluates. Antioxidant status was evaluated using Cayman's antioxidant assay after incubating hGFs with material disc specimens, and cell attachment following dehydration fixation was observed through SEM. Material characterization confirmed the presence of mesoporous structures. Biological behavior and antioxidant capacity were enhanced in all cases with a statistically significant increase in CeMTA 50.50. The application of modified MTA with cerium-doped MSNs offers a promising strategy for vital pulp therapies.
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Affiliation(s)
- Alexandra Kalash
- Department of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (A.K.); (I.T.); (G.K.P.); (E.K.); (A.A.); (K.N.A.)
| | - Ioannis Tsamesidis
- Department of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (A.K.); (I.T.); (G.K.P.); (E.K.); (A.A.); (K.N.A.)
| | - Georgia K. Pouroutzidou
- Department of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (A.K.); (I.T.); (G.K.P.); (E.K.); (A.A.); (K.N.A.)
| | - Eleana Kontonasaki
- Department of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (A.K.); (I.T.); (G.K.P.); (E.K.); (A.A.); (K.N.A.)
| | - Dimitrios Gkiliopoulos
- Laboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece;
| | - Aristidis Arhakis
- Department of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (A.K.); (I.T.); (G.K.P.); (E.K.); (A.A.); (K.N.A.)
| | - Konstantinos N. Arapostathis
- Department of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (A.K.); (I.T.); (G.K.P.); (E.K.); (A.A.); (K.N.A.)
| | - Anna Theocharidou
- Department of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (A.K.); (I.T.); (G.K.P.); (E.K.); (A.A.); (K.N.A.)
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Khoswanto C, Dewi IK. MTA as modulator of periapical tissue healing in rat molar: A histological study. J Oral Biol Craniofac Res 2024; 14:201-204. [PMID: 38445049 PMCID: PMC10912688 DOI: 10.1016/j.jobcr.2024.02.006] [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: 01/16/2024] [Revised: 02/10/2024] [Accepted: 02/23/2024] [Indexed: 03/07/2024] Open
Abstract
Background Periapical surgery has been suggested as a treatment option for teeth with periapical lesions when those lesions continue despite receiving root canal therapy. Since sealing the apical region is the operation's primary goal, the choice of the root-end filling material affects how the surgery turns out. The retrofilling materials Zinc Oxide Eugenol (ZOE) and Mineral trioxide aggregate (MTA) are both known to have antibacterial characteristics. The purpose of this study is to determine how MTA affects as a Modulator of Periapical Tissue Healing through histological examination in Rat Molar. Methods A dental fissure bur measuring 0.7 mm is used to remove the buccal root apex from the buccal alveolar bone's surface, creating the cavity. One of the following is placed within each cavity: Group 1: MTA, Group 2: ZOE. For each material series, six samples were used. We classified the healing outcomes for each MTA and ZOE retrograde filling material into three groups based on histological analysis: the amount of newly generated bone, the number of fibroblasts, and the infiltration of neutrophils into the surgical site. Results On the 6th day of examination, fibroblasts were seen in the area around the wound. A significant inflammatory response, including neutrophil infiltration, was seen around the ZOE after retrograde filling. On the 16th day, the new alveolar bone structure showed a slight increase. After filling the MTA on the 6th day of examination, the immediate inflammatory response was insignificant. Neutrophils were observed to enter the region surrounding the retrofilled MTA, and a small number of osteoclasts were observed to be resorbing bone. Around the wound site, fibroblasts can also be detected. On the 16th day, unlike ZOE, a lot of new bone grows close to this material. Conclusion MTA has the ability to modulate periapical healing in rat molar.
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Affiliation(s)
- Christian Khoswanto
- Department of Oral Biology Faculty of Dentistry, Airlangga University, Surabaya, Indonesia
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Sesen Uslu Y, Arıcan Alpay B, Sesen P, Özyürek T. The Efficacy of Different Laser Applications on Dentin Sealing in Preventing Discoloration Induced by Mineral Trioxide Aggregate. Materials (Basel) 2024; 17:1015. [PMID: 38473488 DOI: 10.3390/ma17051015] [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] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 02/17/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024]
Abstract
The aim of this in vitro study was to evaluate the effect of the pre-application of a dentin-bonding agent and the application of different lasers on the prevention of tooth discoloration caused by mineral trioxide aggregate (MTA) in the presence of blood. Sixty extracted human anterior teeth were selected, with root lengths standardized to 10 mm and root canals shaped using Gates-Glidden drills #3 to #5. The samples were divided into six groups (n = 10): Group 1 with no surface treatment and Groups 2 to 6 with Optibond universal adhesive and Neodymium yttrium aluminum garnet (Nd:YAG), Erbium yttrium aluminum garnet (Er:YAG), Erbium-chromium-yttrium-scandium-gallium-garnet (Er:Cr:YSGG), and diode laser applications, respectively. Root canals were filled with fresh human blood, and ProRoot MTA and a collagen barrier were then placed. Color changes were measured with a spectrophotometer at 0, 7, 30, 90, and 180 days post MTA placement. Color differences (∆E) were analyzed using a two-factor mixed-design ANOVA with the Sidak method (p = 0.05). All treatment groups exhibited discoloration above the acceptability threshold. Although all treatment approaches exhibited less color change compared to the control group (p < 0.05), there was no significant difference among them in terms of preventing color change (p > 0.05). It was determined that none of the methods could guarantee 100% prevention of discoloration caused by MTA-blood contact.
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Affiliation(s)
- Yesim Sesen Uslu
- Department of Restorative Dentistry, School of Dental Medicine, Bahçeşehir University, Istanbul 34349, Turkey
| | - Burçin Arıcan Alpay
- Department of Endodontics, School of Dental Medicine, Bahçeşehir University, Istanbul 34349, Turkey
| | - Pinar Sesen
- Department of Prosthodontics, Faculty of Dentistry, Istanbul Kent University, Istanbul 34433, Turkey
| | - Taha Özyürek
- Department of Endodontics, School of Dental Medicine, Bahçeşehir University, Istanbul 34349, Turkey
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Pham VK, Pham TLK, Pham AT, Le HLA, Tran TBV, Hoang MC, Vo TB, Vy KN, Tran MH, Tran TAT, Bui MA, Hoang AD, Nguyen NP, Nguyen TTD, Nguyen PN, Tran TTV, Nguyen CHL. Platelet rich fibrin and MTA in the treatment of teeth with open apices. BMC Oral Health 2024; 24:230. [PMID: 38350906 PMCID: PMC10865586 DOI: 10.1186/s12903-024-03923-5] [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: 12/14/2023] [Accepted: 01/21/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND The present study aimed to evaluate the effectiveness of using platelet-rich fibrin (PRF) as the apical matrix for the placement of MTA in nonsurgical endodontic therapy for teeth with periapical lesions and open apices. METHODS Twelve teeth from eleven patients with periapical periodontitis and open apices were enrolled in the study. Nonsurgical endodontic therapy was performed with the PRF used as an apical barrier and the MTA manipulated as an apical plug for further thermoplasticized gutta percha in the remaining part of the root canal. Clinical signs and periapical digital radiographs were recorded and analyzed to evaluate the curing progress after periodical follow-ups of 1, 3, and 6 months. The horizontal dimension of the periapical lesion was determined, and the changes in the dimensions were recorded each time. The Friedman test was used for statistical analysis, with P < .05 serving as the threshold for determining statistical significance. RESULTS All patients had no clinical symptoms after the first month of treatment, with a significant reduction in the periapical lesion after periodical appointments. CONCLUSIONS PRF is an effective barrier when combined with MTA for the treatment of teeth with periapical periodontitis and open apices.
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Affiliation(s)
- Van-Khoa Pham
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Tran-Lan-Khue Pham
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - An-Tran Pham
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoang-Lan-Anh Le
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thi-Bich-Van Tran
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Manh-Cuong Hoang
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ta-Binh Vo
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Khanh-Ngoc Vy
- Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Minh-Hong Tran
- National Hospital of Odonto-Stomatology, Ho Chi Minh City, Vietnam
| | - Thi-Anh-Thu Tran
- National Hospital of Odonto-Stomatology, Ho Chi Minh City, Vietnam
| | - Minh-Anh Bui
- National Hospital of Odonto-Stomatology, Ho Chi Minh City, Vietnam
| | - Anh-Dung Hoang
- National Hospital of Odonto-Stomatology, Ho Chi Minh City, Vietnam
| | - Ngoc-Phuc Nguyen
- Faculty of Dentistry, Van Lang University, Ho Chi Minh City, Vietnam
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Kunert M, Piwonski I, Hardan L, Bourgi R, Sauro S, Inchingolo F, Lukomska-Szymanska M. Dentine Remineralisation Induced by "Bioactive" Materials through Mineral Deposition: An In Vitro Study. Nanomaterials (Basel) 2024; 14:274. [PMID: 38334546 PMCID: PMC10857417 DOI: 10.3390/nano14030274] [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] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/10/2024]
Abstract
This study aimed to assess the ability of modern resin-based "bioactive" materials (RBMs) to induce dentine remineralisation via mineral deposition and compare the results to those obtained with calcium silicate cements (CSMs). The following materials were employed for restoration of dentine cavities: CSMs: ProRoot MTA (Dentsply Sirona), MTA Angelus (Angelus), Biodentine (Septodont), and TheraCal LC (Bisco); RBMs: ACTIVA BioACTIVE Base/Liner (Pulpdent), ACTIVA Presto (Pulpdent), and Predicta Bioactive Bulk (Parkell). The evaluation of the mineral deposition was performed through scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) on the material and dentine surfaces, as well as at the dentine-material interface after immersion in simulated body fluid. Additionally, the Ca/P ratios were also calculated in all the tested groups. The specimens were analysed after setting (baseline) and at 24 h, 7, 14, and 28 days. ProRoot MTA, MTA Angelus, Biodentine, and TheraCal LC showed significant surface precipitation, which filled the gap between the material and the dentine. Conversely, the three RBMs showed only a slight ability to induce mineral precipitation, although none of them was able to remineralise the dentine-material interface. In conclusion, in terms of mineral precipitation, modern "bioactive" RBMs are not as effective as CSMs in inducing dentine remineralisation; these latter represent the only option to induce a possible reparative process at the dentin-material interface.
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Affiliation(s)
- Marta Kunert
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska St., 92-213 Lodz, Poland;
| | - Ireneusz Piwonski
- Department of Materials Technology and Chemistry, Faculty of Chemistry, University of Lodz, 163 Pomorska St., 90-236 Lodz, Poland;
| | - Louis Hardan
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon; (L.H.); (R.B.)
| | - Rim Bourgi
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon; (L.H.); (R.B.)
- Department of Biomaterials and Bioengineering, INSERM UMR_S 1121, University of Strasbourg, 67000 Strasbourg, France
| | - Salvatore Sauro
- Dental Biomaterials and Minimally Invasive Dentistry, Departamento de Odontología, Facultad de Ciencias de la Salud, Universidad CEU-Cardenal Herrera C/Del Pozo ss/n, Alfara del Patriarca, 46115 Valencia, Spain
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy;
| | - Francesco Inchingolo
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy;
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Tao W, Tian G, Song Q, Lv Z. Application of mineral trioxide aggregate pulpotomy in the treatment of early pulpitis of primary molars. Am J Transl Res 2024; 16:285-294. [PMID: 38322556 PMCID: PMC10839389] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 12/11/2023] [Indexed: 02/08/2024]
Abstract
OBJECTIVE To evaluate the effectiveness of mineral trioxide aggregate (MTA) on pulpotomy in primary molars. METHODS Two hundred and sixty-three cases (310 teeth) of children with early pulpitis of primary molars admitted between February 2019 to February 2022 were enrolled, and their clinical data were retrospectively analyzed. Of them, 130 cases with 155 teeth treated with root canal treatment were set as the control group (CG) and 133 cases with 155 teeth receiving MTA pulpotomy were set as the observation group (OG). Clinical data such as efficacy evaluation, inflammatory factor levels, postoperative adverse reactions, and quality of life (QoL) were compared. RESULTS After surgery, the overall response rate in the OG was statistically higher than that in the CG, while the levels of inflammatory factors in the OG were significantly lower than those in the CG (all P<0.05). Moreover, the total incidence of complications was significantly lower in OG at 3, 6, and 12 months after surgery (P=0.018, P=0.007, P=0.015, respectively). The QoL of the two groups differed insignificantly before surgery; however, after the treatment, the QoL in OG was significantly higher than those in the CG at 3, 6, and 12 months after surgery (P=0.037, P=0.012, P=0.028, respectively). Moreover, the teeth location and treatment method were independent factors of efficacy (P=0.047, P=0.001, respectively). CONCLUSIONS MTA pulpotomy outperformed root canal treatment for superior efficacy in children with early pulpitis of primary molars, with a positive effect on improving QoL, and patient prognosis.
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Affiliation(s)
- Wen Tao
- Department of Dentistry, People's Hospital Affiliated to Shandong First Medical University Jinan 271199, Shandong, China
| | - Guoyong Tian
- Department of Dentistry, People's Hospital Affiliated to Shandong First Medical University Jinan 271199, Shandong, China
| | - Qingqing Song
- Department of Dentistry, People's Hospital Affiliated to Shandong First Medical University Jinan 271199, Shandong, China
| | - Zhijun Lv
- Department of Dentistry, People's Hospital Affiliated to Shandong First Medical University Jinan 271199, Shandong, China
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van der Vyver P, Potgieter N, Vorster M. Management of a permanent lateral incisor with a talon cusp and immature apex: A case report. Clin Case Rep 2024; 12:e8404. [PMID: 38179468 PMCID: PMC10764977 DOI: 10.1002/ccr3.8404] [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: 08/04/2023] [Revised: 11/09/2023] [Accepted: 12/14/2023] [Indexed: 01/06/2024] Open
Abstract
This case report focuses on the diagnosis and treatment of a maxillary lateral incisor affected by a talon cusp, a rare developmental dental anomaly. The case presented with irreversible pulpitis and an immature apex. The article discusses the prevalence, etiology, classification, and treatment options for talon cusps, highlighting their clinical significance and potential complications. Clinical and radiographic findings obtained from a periapical radiograph and a cone-beam computed tomography (CBCT) scan are outlined. The treatment approach involved the removal of the talon cusp, endodontic therapy including apexification with mineral trioxide aggregate, and aesthetic restoration of the tooth. The report underscores the value of precise diagnosis, careful treatment planning, and the utility of CBCT scans in effectively managing talon cusps.
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Affiliation(s)
- Peet van der Vyver
- Department of Odontology, Faculty of Health SciencesUniversity of PretoriaPretoriaSouth Africa
| | - Nicoline Potgieter
- Department of Paediatric Dentistry, Faculty of DentistryUniversity of the Western CapeCape TownSouth Africa
| | - Martin Vorster
- Department of Odontology, Faculty of Health SciencesUniversity of PretoriaPretoriaSouth Africa
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Fasoulas A, Keratiotis G, Spineli L, Pandis N, De Bruyne MAA, De Moor RJ, Meire MA. Comparative efficacy of materials used in patients undergoing pulpotomy or direct pulp capping in carious teeth: A systematic review and meta-analysis. Clin Exp Dent Res 2023; 9:1129-1148. [PMID: 37710421 PMCID: PMC10728530 DOI: 10.1002/cre2.767] [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: 02/04/2023] [Revised: 06/23/2023] [Accepted: 07/10/2023] [Indexed: 09/16/2023] Open
Abstract
OBJECTIVES Different materials have been used for capping the pulp after exposure during caries removal in permanent teeth. The purpose of this study was to collate and analyze all pertinent evidence from randomized controlled trials (RCTs) on different materials used in patients undergoing pulpotomy or direct pulp capping in carious teeth. MATERIALS AND METHODS Trials comparing two or more capping agents used for direct pulp capping (DPC) or pulpotomy were considered eligible. An electronic search of four databases and two clinical trial registries was carried out up to February 28, 2021 using a search strategy properly adapted to the PICO framework. Screening, data extraction, and risk of bias (RoB) assessment of primary studies were performed in duplicate and independently. The primary outcome was clinical and radiological success; secondary outcomes included continued root formation, tooth discoloration, and dentin bridge formation. RESULTS 21 RCTs were included in the study. The RoB assessment indicated a moderate risk among the studies. Due to significant clinical and statistical heterogeneity among the studies, performing network meta-analysis (NMA) was not possible. An ad hoc subgroup analysis revealed strong evidence of a higher success of DPC with Mineral Trioxide Aggregate (MTA) compared to calcium hydroxide (CH) (odds ratio [OR] = 3.10, 95% confidence interval [CI]: 1.66-5.79). MTA performed better than CH in pulp capping (both DPC and pulpotomy) of mature compared to immature teeth (OR = 3.34, 95% CI: 1.81-6.17). The GRADE assessment revealed moderate strength of evidence for DPC and mature teeth, and low to very low strength of evidence for the remaining subgroups. CONCLUSIONS Considerable clinical and statistical heterogeneity among the trials did not allow NMA. The ad hoc subgroup analysis indicated that the clinical and radiographic success of MTA was higher than that of CH but only in mature teeth and DPC cases where the strength of evidence was moderate. PROSPERO Registration: number CRD42020127239.
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Affiliation(s)
- Athanasios Fasoulas
- Department of Oral Health Sciences, Section of EndodontologyGhent UniversityGhentBelgium
| | - Georgios Keratiotis
- Department of Oral Health Sciences, Section of EndodontologyGhent UniversityGhentBelgium
| | - Loukia Spineli
- Midwifery Research and Education UnitHannover Medical SchoolHannoverGermany
| | - Nikos Pandis
- Department of Orthodontics and Dentofacial OrthopaedicsUniversity of BernBernSwitzerland
| | - Mieke A. A. De Bruyne
- Department of Oral Health Sciences, Section of EndodontologyGhent UniversityGhentBelgium
| | - Roeland J.G. De Moor
- Department of Oral Health Sciences, Section of EndodontologyGhent UniversityGhentBelgium
| | - Maarten A. Meire
- Department of Oral Health Sciences, Section of EndodontologyGhent UniversityGhentBelgium
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Rasteh B, Basir L, Taravati S, Khataminia M. Evaluation and comparison of mineral trioxide aggregate and cold ceramic in primary tooth pulpotomy: Clinical and radiographic study. J Family Med Prim Care 2023; 12:3068-3074. [PMID: 38361859 PMCID: PMC10866251 DOI: 10.4103/jfmpc.jfmpc_412_23] [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: 03/03/2023] [Revised: 05/08/2023] [Accepted: 06/01/2023] [Indexed: 02/17/2024] Open
Abstract
Aim In recent years, many studies have been conducted on different materials for covering the pulp in pulpotomy. Recently, some materials such as Coldceram have been introduced that have the ability to regenerate the pulp. In this study, our aim was to compare the clinical and radiographic success of the pulpotomy of milk molars using MTA and Coldceram over 3-, 6-, and 9-month follow-ups. Methods In this clinical trial, 42 children aged 4-9 years old who fulfilled the inclusion criteria of the study were selected. Finally, pulpotomy was conducted on 42 teeth using MTA and another 42 teeth using Coldceram in these children. Simultaneously, all teeth were permanently repaired using glass ionomer and metal veneers in the same treatment session. Then, clinical and radiographic evaluation was conducted in 3-, 6-, and 9-month follow-up periods. Results None of the teeth showed clinical symptoms at the specified 3-, 6-, and 9-month follow-up times, and clinical success was 100% in both groups. In radiographic evaluation, the numbers of successful treatments were 42/42 (100%) and 41/42 (97%) for the teeth treated with MTA and Coldceram, respectively. Conclusion According to this research, both materials were proven to have a 100% clinical success rate, but in the radiographic evaluation, MTA attained a higher success rate compared with Coldceram; however, this difference was not statistically significant (P = 0.36). It is recommended to consider longer follow-ups and larger sample sizes in future studies.
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Affiliation(s)
- Bita Rasteh
- Department of Pediatric Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Leila Basir
- Department of Pediatric Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Shirin Taravati
- Department of Pediatric Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Masoumeh Khataminia
- Department of Pediatric Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Sulimany AM, Aldowsari M, Saleh SB, Almajhdi FF, Al Ajlan OA, ALSayyari IM, Alshehri KM, Hamdan HM. Primary tooth vital pulp therapy techniques taught in dental schools in Saudi Arabia: a cross-sectional study. J Clin Pediatr Dent 2023; 47:86-93. [PMID: 37997239 DOI: 10.22514/jocpd.2023.082] [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: 03/01/2023] [Accepted: 05/12/2023] [Indexed: 11/25/2023] Open
Abstract
Worldwide, dental schools employ varying approaches to teaching vital pulp therapy (VPT) for primary teeth. However, little is known about the VPT techniques taught in dental schools in Saudi Arabia. Therefore, this study aimed to describe the approaches of VPT for primary teeth taught in undergraduate dental schools in Saudi Arabia. A nationwide cross-sectional study was conducted between January and June 2022, using an online questionnaire distributed to pediatric dentistry faculty members at all dental schools in Saudi Arabia. The questionnaire collected information on socio-demographic characteristics, educational background, work setting, and VPT teaching approaches. Descriptive statistics and logistic regression models assessed the association between participants' characteristics and the VPT techniques taught. Seventy-seven faculty members from 17 out of 27 dental colleges in Saudi Arabia participated in the study. Most respondents reported teaching indirect pulp capping (95%), with glass ionomer cement and calcium hydroxide being the most popular materials. Only 11 participants (14%) taught direct pulp capping, with mineral trioxide aggregate and calcium hydroxide being the most commonly used materials. Pulpotomy procedures were taught in all dental schools, with formocresol being the most commonly used medicament (84%). No significant associations were found between faculty member characteristics and the likelihood of teaching indirect pulp capping. However, older age categories had a significantly higher chance of teaching direct pulp capping (trend odds ratio: 2.27, p = 0.02). In conclusion, most faculty members (95%) reported teaching indirect pulp capping using glass ionomer cement and calcium hydroxide for primary teeth. Only 14% of the respondents taught direct pulp capping, and the use of mineral trioxide aggregate for direct pulp capping appears to be increasing. Formocresol was the most commonly used pulpotomy medicament. Further research is needed to investigate factors that influence the teaching of VPT for primary teeth in Saudi Arabia.
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Affiliation(s)
- Ayman M Sulimany
- Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, 11545 Riyadh, Saudi Arabia
| | - Mannaa Aldowsari
- Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, 11545 Riyadh, Saudi Arabia
| | - Saad Bin Saleh
- Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, 11545 Riyadh, Saudi Arabia
| | - Faisal F Almajhdi
- College of Dentistry, King Saud University, 11545 Riyadh, Saudi Arabia
| | - Omar A Al Ajlan
- College of Dentistry, King Saud University, 11545 Riyadh, Saudi Arabia
| | | | - Khalid M Alshehri
- College of Dentistry, King Saud University, 11545 Riyadh, Saudi Arabia
| | - Hebah M Hamdan
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, 11545 Riyadh, Saudi Arabia
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Jimenez-Bueno I, Garcia-Contreras R, Aranda-Herrera B, Sakagami H, Lopez-Ayuso CA, Nakajima H, Jurado CA, Nurrohman H. Cytotoxicity, Differentiation, and Biocompatibility of Root-End Filling: A Comprehensive Study. Biomimetics (Basel) 2023; 8:514. [PMID: 37999155 PMCID: PMC10669418 DOI: 10.3390/biomimetics8070514] [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: 09/20/2023] [Revised: 10/11/2023] [Accepted: 10/26/2023] [Indexed: 11/25/2023] Open
Abstract
Assessing the biocompatibility of endodontic root-end filling materials through cell line responses is both essential and of utmost importance. This study aimed to the cytotoxicity of the type of cell death through apoptosis and autophagy, and odontoblast cell-like differentiation effects of MTA, zinc oxide-eugenol, and two experimental Portland cements modified with bismuth (Portland Bi) and barium (Portland Ba) on primary cell cultures. Material and methods: The cells corresponded to human periodontal ligament and gingival fibroblasts (HPLF, HGF), human pulp cells (HPC), and human squamous carcinoma cells from three different patients (HSC-2, -3, -4). The cements were inoculcated in different concentrations for cytotoxicity evaluation, DNA fragmentation in electrophoresis, apoptosis caspase activation, and autophagy antigen reaction, odontoblast-like cells were differentiated and tested for mineral deposition. The data were subject to a non-parametric test. Results: All cements caused a dose-dependent reduction in cell viability. Contact with zinc oxide-eugenol induced neither DNA fragmentation nor apoptotic caspase-3 activation and autophagy inhibitors (3-methyladenine, bafilomycin). Portland Bi accelerated significantly (p < 0.05) the differentiation of odontoblast-like cells. Within the limitation of this study, it was concluded that Portland cement with bismuth exhibits cytocompatibility and promotes odontoblast-like cell differentiation. This research contributes valuable insights into biocompatibility, suggesting its potential use in endodontic repair and biomimetic remineralization.
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Affiliation(s)
- Ignacio Jimenez-Bueno
- Department of Endodontics, Faculty of Dentistry, Autonomous University State of Mexico (UAEMex), Toluca 50130, State of Mexico, Mexico;
| | - Rene Garcia-Contreras
- Interdisciplinary Research Laboratory, Nanostructures and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico; (R.G.-C.); (C.A.L.-A.)
| | - Benjamin Aranda-Herrera
- Interdisciplinary Research Laboratory, Nanostructures and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico; (R.G.-C.); (C.A.L.-A.)
| | - Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), Meikai University School of Dentistry, Sakado 350-0283, Saitama, Japan;
| | - Christian Andrea Lopez-Ayuso
- Interdisciplinary Research Laboratory, Nanostructures and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico; (R.G.-C.); (C.A.L.-A.)
| | - Hiroshi Nakajima
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, Sakado 350-0283, Saitama, Japan
| | - Carlos A. Jurado
- Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, IA 52242, USA
| | - Hamid Nurrohman
- Department of Restorative Dentistry & Prosthodontics, University of Texas School of Dentistry, Houston, TX 77054, USA
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Wang D, Zhao Y, Zhao X, Ji M, Guo X, Tian J, Chen G, Deng Z. Genome-wide association analysis of type II resistance to Fusarium head blight in common wheat. PeerJ 2023; 11:e15906. [PMID: 37750077 PMCID: PMC10518165 DOI: 10.7717/peerj.15906] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 07/26/2023] [Indexed: 09/27/2023] Open
Abstract
Background Fusarium head blight (FHB) is a disease affecting wheat spikes caused by some Fusarium species and leads to cases of severe yield reduction and seed contamination. Identifying resistance genes/QTLs from wheat germplasm may help to improve FHB resistance in wheat production. Methods Our study evaluated 205 elite winter wheat cultivars for FHB resistance. A high-density 90K SNP array was used for genotyping the panel. A genome-wide association study (GWAS) from cultivars from three different environments was performed using a mixed linear model (MLM). Results Sixty-six significant marker-trait associations (MTAs) were identified (P < 0.001) on fifteen chromosomes that explained the phenotypic variation ranging from 5.4 to 11.2%. Some important new MTAs in genomic regions involving FHB resistance were found on chromosomes 2A, 3B, 5B, 6A, and 7B. Six MTAs at 92 cM on chromosome 7B were found in cultivars from two different environments. Moreover, there were 11 MTAs consistently associated with diseased spikelet rate and diseased rachis rate as pleiotropic effect loci and D_contig74317_533 on chromosome 5D was novel for FHB resistance. Eight new candidate genes of FHB resistance were predicated in wheat in this study. Three candidate genes, TraesCS5D02G006700, TraesCS6A02G013600, and TraesCS7B02G370700 on chromosome 5DS, 6AS, and 7BL, respectively, were perhaps important in defending against FHB by regulating intramolecular transferase activity, GTP binding, or chitinase activity in wheat, but further validation in needed. In addition, a total of five favorable alleles associated with wheat FHB resistance were discovered. These results provide important genes/loci for enhancing FHB resistance in wheat breeding by marker-assisted selection.
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Affiliation(s)
- Dehua Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong, China
| | - Yunzhe Zhao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong, China
| | - Xinying Zhao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong, China
| | - Mengqi Ji
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong, China
| | - Xin Guo
- Taiyuan Agro-Tech Extension and Service Center, Taiyuan, Shanxi, China
| | - Jichun Tian
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong, China
- Shandong Huatian Agricultural Technology Co., Ltd, Tai’an, Shandong, China
| | - Guangfeng Chen
- College of Ecology and Garden Architecture, Dezhou University, Dezhou, Shandong, China
| | - Zhiying Deng
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong, China
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Herrera-Trinidad R, Molinero-Mourelle P, Fonseca M, Weber AR, Vera V, Mena ML, Vera-González V. Assessment of pH Value and Release of Calcium Ions in Calcium Silicate Cements: An In Vitro Comparative Study. Materials (Basel) 2023; 16:6213. [PMID: 37763492 PMCID: PMC10532804 DOI: 10.3390/ma16186213] [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] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023]
Abstract
The goal of this study was to evaluate the pH and the release of calcium from four calcium-silicate-based cements. METHODS Four materials were tested (ProClinic MTA; Angelus MTA; ProRoot MTA; Biodentine). The palatal canal root of acrylic upper molars was filled with each cement. Afterwards, they were set in phosphate-buffered saline. Measurements were taken by atomic adsorption spectroscopy (AAS) at 3, 24, 72, 168, 336, 672, and 1008 h. The pH was measured at the same timepoints. Kruskal-Wallis tests were carried out in each period, as the Kolmogorov-Smirnov and Shapiro-Wilk tests showed no parametric results. RESULTS Significant differences (p < 0.05) in calcium release were found at the 3-, 24-, and 72-hour evaluations. All of the analyzed groups presented a release of calcium ions up to 168 h, and the general tendency was to increase up to 672 h, with a maximum release of 25.45 mg/g in the ProRoot group. We could only observe significant differences (p < 0.05) in pH value over 168 h between the Biodentine (7.93) and Angelus MTA (7.31) groups. CONCLUSIONS There were significant differences (p < 0.05) in calcium release. Nevertheless, no significant differences (p > 0.05) in the pH values were found at the studied timepoints, except for the values at 168 h.
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Affiliation(s)
- Rubén Herrera-Trinidad
- Department of Conservative Dentistry and Orofacial Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
| | - Pedro Molinero-Mourelle
- Department of Conservative Dentistry and Orofacial Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3007 Bern, Switzerland
| | - Manrique Fonseca
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3007 Bern, Switzerland
| | - Adrian Roman Weber
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3007 Bern, Switzerland
| | - Vicente Vera
- Department of Prosthodontics and Operative Dentistry, School of Dental Medicine, Tufts University, Boston, MA 02111, USA
| | - María Luz Mena
- Department of Analytics Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040 Madrid, Spain
| | - Vicente Vera-González
- Department of Conservative Dentistry and Orofacial Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
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Singh DVV, Taneja S, Fatima S. Comparative evaluation of treatment outcome of partial pulpotomy using different agents in permanent teeth-a randomized controlled trial. Clin Oral Investig 2023; 27:5171-5180. [PMID: 37460903 DOI: 10.1007/s00784-023-05136-6] [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: 02/14/2023] [Accepted: 06/26/2023] [Indexed: 09/10/2023]
Abstract
AIM To compare and evaluate the clinical and radiographic performance, post-operative pain, and anti-inflammatory intake after partial pulpotomy (PP) with calcium hydroxide (CH), mineral trioxide aggregate (MTA), Biodentine (BD), and Emdogain (EMD) as pulp capping agents in mature permanent molars with definitive diagnosis of reversible pulpitis. MATERIALS AND METHODS As part of this prospective, randomized clinical trial with four parallel arms (CTRI Registration No.: CTRI/2020/11/029329 dated 24/11/2020), hundred and ten permanent molars with a clinical diagnosis of reversible pulpitis and normal apical tissues, from patients between the ages of 15 and 45 years, were recruited and randomly assigned to four groups-CH, MTA, BD, and EMD. Operative procedure was performed under local anesthesia and dental dam isolation. After carious pulpal exposure, 2 mm of superficially inflamed coronal pulp tissue was amputated and either of the four pulp capping materials was placed. The outcome assessment was carried out at 1, 3, 6, and 12 month(s) and was categorized as success (asymptomatic patients with PAI score = 1) or failure (symptomatic patients or PAI score > 1). RESULTS There was a significant difference in post-operative pain and anti-inflammatory medication intake after partial pulpotomy with Emdogain vis-à-vis other three capping agents. No difference in both clinical and radiographic performances was observed among the four capping agents. CONCLUSION Partial pulpotomy when performed following evidence-based guidelines results in high success rates regardless of capping agent employed. EMD can be considered a valid and suitable pulp capping agent in PP. CLINICAL RELEVANCE Meticulous examination and removal of superficially inflamed pulp under magnification and complete asepsis lead to successful pulpal healing regardless of capping agent employed.
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Affiliation(s)
- Dev Veer Vikram Singh
- Department of Conservative Dentistry and Endodontics, I.T.S.C.D.S.R., Muradnagar, India.
| | - Sonali Taneja
- Department of Conservative Dentistry and Endodontics, I.T.S.C.D.S.R., Muradnagar, India.
| | - Sana Fatima
- Department of Conservative Dentistry and Endodontics, I.T.S.C.D.S.R., Muradnagar, India
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Elsayed MA, Islam MS, Elbeltagy K, Nassar M. Effect of different chelating agents on the shear bond strength of calcium silicate-based cements to coronal dentin. AUST ENDOD J 2023; 49 Suppl 1:426-432. [PMID: 37092561 DOI: 10.1111/aej.12759] [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: 11/22/2022] [Revised: 03/09/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023]
Abstract
We evaluated the shear bond strength (SBS) of mineral trioxide aggregate (MTA) and Biodentine (BD) to coronal dentin after treatment with ethylenediaminetetraacetic acid (EDTA), phytic acid (IP6), or etidronic acid (HEDP). Sodium hypochlorite-treated dentin surfaces were randomly divided into four groups according to conditioning protocol namely, 17% EDTA, 2.5% IP6, 9% HEDP, or distilled water (DS). Specimens were further divided according to the type of cement placed on conditioned dentin and SBS was tested. The results showed that DS/MTA and IP6/MTA groups had the highest values, and there was no significant difference between these two groups. IP6/BD group showed a lower SBS value compared to IP6/MTA; however, this did not reach the level of significance. The BS to dentin was influenced by the type of calcium silicate material and chelating agent. IP6 either improved or maintained the bonding while EDTA and HEDP showed a negative or no influence effect.
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Affiliation(s)
- Mohamed Ahmed Elsayed
- Department of Endodontics, RAK College of Dental Sciences, RAK Medical and Health Sciences University, United Arab Emirates
- Department of Endodontics, Faculty of Dentistry, Assiut University, Assiut, Egypt
| | - Md Sofiqul Islam
- Department of Operative Dentistry, RAK College of Dental Sciences, RAK Medical and Health Sciences University, United Arab Emirates
| | - Karim Elbeltagy
- Department of Clinical Science, RAK College of Dental Sciences, RAK Medical and Health Sciences University, United Arab Emirates
| | - Mohannad Nassar
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates
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Topçuoğlu G, Topçuoğlu HS. Fracture resistance of primary molars after pulpotomy procedure using mineral trioxide aggregate or Biodentine. J Clin Pediatr Dent 2023; 47:133-137. [PMID: 37732446 DOI: 10.22514/jocpd.2023.062] [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: 04/17/2023] [Accepted: 07/13/2023] [Indexed: 09/22/2023] Open
Abstract
In this study, the effect of mineral trioxide aggregate (MTA) and Biodentine on the resistance to fracture of pulpotomized primary molars was evaluated. 75 primary molars were divided into 2 control groups (positive and negative) and 3 experimental groups with 15 teeth each. No treatment was applied to the teeth in the negative control group. In the teeth in the positive control group, pulpotomy cavities were performed, but not filled. In the teeth in the experimental group, pulpotomy cavities were performed, and filled as follows. Group 3: mineral trioxide aggregate + glass ionomer cement (GIC); Group 4: Biodentine + GIC and Group 5: zinc oxide-eugenol + GIC. Final restorations in teeth in all experimental groups were completed with composite filling material. 75 teeth were then subjected to fracture resistance testing. Obtained data were analyzed statistically. Sorting by fracture resistance; Group1 > Group 4 > Group 3 = Group 5 > Group 2 (p < 0.05). Restorable fracture type was predominant in experimental groups (p < 0.05). The use of Biodentine in teeth undergoing pulpotomy in primary teeth can be preferred as a suitable base material to increase resistance to fracture.
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Affiliation(s)
- Gamze Topçuoğlu
- Department of Pedodontics, Faculty of Dentistry, Haci Bektaş Veli University, 50100 Nevşehir, Turkey
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Yousefi-Koma AA, Assadian H, Mohaghegh S, Nokhbatolfoghahaei H. Comparative Biocompatibility and Odonto-/Osteogenesis Effects of Hydraulic Calcium Silicate-Based Cements in Simulated Direct and Indirect Approaches for Regenerative Endodontic Treatments: A Systematic Review. J Funct Biomater 2023; 14:446. [PMID: 37754860 PMCID: PMC10532331 DOI: 10.3390/jfb14090446] [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: 02/02/2023] [Revised: 02/12/2023] [Accepted: 02/17/2023] [Indexed: 09/28/2023] Open
Abstract
BACKGROUND Regenerative dentistry is the operation of restoring dental, oral and maxillofacial tissues. Currently, there are no guidelines for the ideal cement/material in regenerative endodontic treatments (RET). Hydraulic calcium silicate-based cements (hCSCs) are currently the material of choice for RET. OBJECTIVES This systematic review was conducted to gather all of the different direct and indirect approaches of using hCSCs in RET in vitro and in vivo, and to ascertain if there are any superiorities to indirect approaches. METHODS AND MATERIALS This systematic review was conducted according to the 2020 PRISMA guidelines. The study question according to the PICO format was as follows: Comparison of the biological behavior (O) of stem cells (P) exposed to hCSCs through direct and indirect methods (I) with untreated stem cells (C). An electronic search was executed in Scopus, Google Scholar, and PubMed. RESULTS A total of 78 studies were included. Studies were published between 2010 and 2022. Twenty-eight commercially available and eighteen modified hCSCs were used. Seven exposure methods (four direct and three indirect contacts) were assessed. ProRoot MTA and Biodentine were the most used hCSCs and had the most desirable results. hCSCs were either freshly mixed or set before application. Most studies allowed hCSCs to set in incubation for 24 h before application, which resulted in the most desirable biological outcomes. Freshly mixed hCSCs had the worst outcomes. Indirect methods had significantly better viability/proliferation and odonto-/osteogenesis outcomes. CONCLUSION Biodentine and ProRoot MTA used in indirect exposure methods result in desirable biological outcomes.
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Affiliation(s)
- Amir-Ali Yousefi-Koma
- Dental Research Center, Research Institute of Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran 1983963113, Iran
| | - Hadi Assadian
- Department of Endodontics, Tehran University of Medical Sciences, Tehran 1417614418, Iran
| | - Sadra Mohaghegh
- Dental Research Center, Research Institute of Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran 1983963113, Iran
| | - Hanieh Nokhbatolfoghahaei
- Dental Research Center, Research Institute of Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran 1983963113, Iran
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Alzahrani AY, Al Tuwirqi AA, Bamashmous NO, Bakhsh TA, El Ashiry EA. Non-Destructive In Vitro Evaluation of an Internal Adaptation of Recent Pulp-Capping Materials in Permanent Teeth Using OCT and Micro-CT. Children (Basel) 2023; 10:1318. [PMID: 37628317 PMCID: PMC10453480 DOI: 10.3390/children10081318] [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] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/27/2023] [Accepted: 07/27/2023] [Indexed: 08/27/2023]
Abstract
The objective of this study was to assess and compare the internal adaptation of various pulp-capping materials, namely TheraCal, Biodentine, and mineral trioxide aggregate (MTA), on the dentin of permanent teeth through the utilization of micro-computed tomography (MCT) and optical coherence tomography (OCT). Thirty permanent molars were divided into three groups using a random process: group A (TheraCal), group B (Biodentine), and group C (MTA, which served as the control group). On the buccal surface of each tooth, a class V cavity of a standardized cylindrical shape was prepared. Subsequently, the respective pulp-capping material was applied to the cavity based on the assigned group, followed by restoration with composite resin. Based on the MCT results, it was observed that group A had a considerably larger gap volume in comparison to groups B and C (p < 0.001). There was no significant difference in gap volume between groups B and C. Regarding the OCT findings, group A displayed a substantially higher level of light reflection than groups B and C (p < 0.001). Group C exhibited a significantly lower level of light reflection in comparison to group B (p < 0.001). Biodentine and MTA revealed similar outcomes in terms of how well they adhered to the dentinal surface in permanent teeth. Both materials exhibited superior performance in comparison to TheraCal. The utilization of OCT in clinical practice could be advantageous as it enables dentists to monitor and evaluate restorations during post-treatment follow-up. It is imperative to intensify efforts aimed at making OCT equipment more accessible and applicable, overcoming its current limitations, and allowing for its widespread utilization in clinical practice.
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Affiliation(s)
- Ahmed Y. Alzahrani
- Pediatric Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.Y.A.); (N.O.B.); (E.A.E.A.)
| | - Amani A. Al Tuwirqi
- Pediatric Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.Y.A.); (N.O.B.); (E.A.E.A.)
| | - Nada O. Bamashmous
- Pediatric Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.Y.A.); (N.O.B.); (E.A.E.A.)
| | - Turki A. Bakhsh
- Restorative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Eman A. El Ashiry
- Pediatric Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.Y.A.); (N.O.B.); (E.A.E.A.)
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Zhang S, Wang A, Liu S, Liu H, Zhu W, Zhang Z. Glycemic variability correlates with medial temporal lobe atrophy and decreased cognitive performance in patients with memory deficits. Front Aging Neurosci 2023; 15:1156908. [PMID: 37533764 PMCID: PMC10390778 DOI: 10.3389/fnagi.2023.1156908] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 06/28/2023] [Indexed: 08/04/2023] Open
Abstract
Background In the past, researchers have observed a significant link between glycemia and dementia. Medial temporal atrophy (MTA) is regarded as a common marker of dementia. The correlation between glycemic variability and MTA is unclear, and it has not been determined whether glycemic variability can be utilized as a biomarker of MTA and cognitive performance. Methods The patients in a memory clinic who underwent brain MRI scans and cognitive assessments within the first week of their hospital visit, were enrolled. All participants underwent three fasting blood glucose and one HBA1c assessments on three self-selected days within 1 week of their first visit. The variability independent of the mean (VIM) was employed. Validated visual scales were used to rate the MTA results. The mini-mental state examination (MMSE) and Montreal Cognitive Assessment (MoCA) scales were employed to assess the cognitive functions of the participants. Spearman's correlation and regression models were used to examine the relationship between the MMSE and MoCA scales, and also determine the link between the MRI characteristics and cognitive status, where vascular risk factors, educational status, age, gender, and mean glucose parameters served as covariates. Results Four hundred sixty-one subjects completed the MMSE scale, while 447 participants completed the MoCA scale. Data analysis revealed that 47.72% of the participants were men (220/461), and the median age of the patients was 69.87 ± 5.37 years. The findings of Spearman's correlation analysis exhibited a strong negative relationship between the VIM and MMSE score (r = -0.729, P < 0.01), and the MoCA score (r = -0.710, P < 0.01). The VIM was regarded as an independent risk factor for determining cognitive impairment in both the MMSE and MoCA assessments. The results were unaffected by sensitivity analysis. In addition, a non-linear relationship was observed between the VIM and MTA scores. Conclusion The variability in the blood glucose levels, which was presented as VIM, was related to the reduced cognitive function, which was reflected by MMSE and MoCA scales. The relationship between the VIM and the MTA score was non-linear. The VIM was positively related to the MTA score when the VIM was less than 2.42.
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Affiliation(s)
- Shuangmei Zhang
- Department of Pain Rehabilitation, Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Hangzhou, China
- Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Anrong Wang
- The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Shen Liu
- The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, China
- Department of Neurology of Traditional Chinese Medicine, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
- Institute for Brain Disorders, Beijing University of Chinese Medicine, Beijing, China
| | - Hongyu Liu
- Affiliated Hospital of Traditional Chinese Medicine of Guangzhou Medical University, Guangzhou, China
| | - Weifeng Zhu
- Affiliated Hospital of Traditional Chinese Medicine of Guangzhou Medical University, Guangzhou, China
| | - Zhaoxu Zhang
- Department of Neurology, Peking University People's Hospital, Beijing, China
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22
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Ageel BM, El Meligy OA, Quqandi SMA. Mineral Trioxide Aggregate Apexogenesis: A Systematic Review. J Pharm Bioallied Sci 2023; 15:S11-S17. [PMID: 37654389 PMCID: PMC10466563 DOI: 10.4103/jpbs.jpbs_530_22] [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: 10/29/2022] [Revised: 11/15/2022] [Accepted: 12/16/2022] [Indexed: 09/02/2023] Open
Abstract
Objectives To evaluate the clinical and radiographic outcomes of apexogenesis with mineral trioxide aggregate (MTA) against other pulpotomy agents in carious/traumatized immature permanent teeth. Data Source A web-based search for possibly relevant scientific papers in the English language between January 2013 and August 2022 was undertaken in the databases such as PubMed, Scopus, Cochrane Library, and EMBASE. Only randomized clinical trials that compared MTA against other pulpotomy medicaments conducted in vital immature permanent dentition with open apex, having a sample size of not less than 20 with at least 6 months follow-up, reporting clinical or radiographic outcomes were included in the current review. Case studies, case series, animal studies, in vitro studies, non-clinical/clinical trials on mature/necrotic permanent or primary dentition, systematic reviews, and letters to the editor were excluded. Study Selection A total of 236 articles were retrieved from the databases during the search procedure. Two independent investigators conducted a full-text review of 83 studies following a screening of titles and abstracts. Eventually, seven studies were considered for the review. The Cochrane bias assessment tool was used to evaluate the quality of included studies. Five of the selected studies were assigned a low evidence level, whereas two were rated a high evidence level. Conclusion The present review indicated that the diverse pulpotomy agents had comparable clinical outcomes with MTA for apexogenesis in traumatized or carious immature permanent teeth. However, there is a lack of substantial information to draw firm conclusions about the benefits of one material over another.
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Affiliation(s)
| | - Omar A. El Meligy
- Professor of Pediatric Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
- Professor of Pediatric Dentistry, Faculty of Dentistry, Alexandria University, Egypt
| | - Sarah M. A. Quqandi
- Department of Pediatric Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
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Kalaoglu EE, Duman C, Capan BS, Ocak M, Bilecenoglu B. Comparison of three different biomaterials used in in vitro molar apexification models. BMC Oral Health 2023; 23:434. [PMID: 37391750 PMCID: PMC10311754 DOI: 10.1186/s12903-023-03180-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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/27/2023] [Indexed: 07/02/2023] Open
Abstract
OBJECTIVES New biomaterials had some advantages such as mixing and easier application as compared to traditional MTA in single step apexification method. This study aimed to compare the three biomaterials used in the apexification treatment of immature molar teeth in terms of the time spent, the quality of the canal filling and the number of x-rays taken to complete the process. METHODS The root canals of the extracted thirty molar teeth were shaped with rotary tools. To obtain the apexification model, ProTaper F3 was used retrograde. The teeth were randomly assigned into three groups based on the material used to seal the apex; Group 1: Pro Root MTA, Group 2: MTA Flow, Group 3: Biodentine. The amounts of the filling, the number of radiographs taken until treatment completion and the treatment duration were recorded. Then teeth were fixed for micro computed tomography imaging for quality evaluation of canal filling. RESULTS Biodentine was superior to the other filling materials according to time. MTA Flow provided greater filling volume than the other filling materials in the rank comparison for the mesiobuccal canals. MTA Flow had greater filling volume than ProRoot MTA in the palatinal/distal canals(p = 0.039). Biodentine had greater filling volume more than MTA Flow in the mesiolingual/distobuccal canals (p = 0.049). CONCLUSIONS MTA Flow was found as a suitable biomaterial according to the treatment time and quality of root canal fillings.
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Affiliation(s)
- Elif Ece Kalaoglu
- Faculty of Dentistry, Department of Pedodontics, Istanbul Gelisim University, Istanbul, Turkey.
| | - Canan Duman
- Faculty of Dentistry, Department of Pedodontics, Istanbul Atlas University, Istanbul, Turkey
| | - Belen Sirinoglu Capan
- Faculty of Dentistry, Department of Pedodontics, Istanbul University-Cerrahpaşa, Istanbul, Turkey
| | - Mert Ocak
- Faculty of Dentistry, Department of Anatomy, Ankara University, Ankara, Turkey
| | - Burak Bilecenoglu
- Faculty of Medicine, Department of Anatomy, Ankara Medipol University, Ankara, Turkey
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Appel D, Schäfer E, Appel C. Success rate of orthograde endodontic retreatment after failed apicectomy - a retrospective study. Int Endod J 2023. [PMID: 37096494 DOI: 10.1111/iej.13925] [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: 12/19/2022] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 04/26/2023]
Abstract
INTRODUCTION Orthograde retreatment after failed apicectomy maybe a treatment alternative to endodontic resurgery. The purpose of this study was to examine the clinical outcome of orthograde endodontic retreatment after failed apicectomy. METHODOLOGY Success was rated radiographically in 191 cases of orthograde retreatment after failed apicectomy that were treated in a private practice with a documented recall of at least 12 months. The radiographs were rated individually by two observers, in cases of disagreement a consensus was reached by joint discussion with a third observer. Success or failure were evaluated according to previously described criteria. The success rate and the median survival were calculated using the Kaplan-Meier survival analysis. The log rank test was used to evaluate the effect of prognostic factors/predictors. Hazard ratios of predictors were analyzed using Univariate Cox Proportional Hazard regression analysis. RESULTS The mean follow-up of the included 191 patients (124 females, 67 males) was 32.13 (± 23.68) months and the median was 25 months. The overall recall rate was 54%. Cohen Kappa analysis revealed nearly perfect agreement between both observers (k=0.81; P=1.0). The overall percentage of success was 84.82% (complete healing 79.06%, incomplete healing 5.76%). The median survival was 86 months (95% CI: 56-86). None of the selected predictors had an influence on the treatment outcome (P>0.05). CONCLUSIONS Orthograde retreatment should be considered a valuable treatment option after failed apicectomy. A surgical endodontic retreatment can still be a treatment option after orthograde retreatment to obtain outcome for the patient.
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Affiliation(s)
- David Appel
- Private Practice Endodontie am Venusberg, Sertürner Str. 41, 53127, Bonn, Germany
| | - Edgar Schäfer
- Central Interdisciplinary Ambulance in the School of Dentistry, University of Münster, Albert-Schweitzer-Campus 1, building W 30, Münster, Germany
| | - Carsten Appel
- Private Practice Endodontie am Venusberg, Sertürner Str. 41, 53127, Bonn, Germany
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Rathinam E, Rajasekharan S, Declercq H, Vanhove C, De Coster P, Martens L. Effect of Intracoronal Sealing Biomaterials on the Histological Outcome of Endodontic Revitalisation in Immature Sheep Teeth-A Pilot Study. J Funct Biomater 2023; 14:jfb14040214. [PMID: 37103304 PMCID: PMC10144940 DOI: 10.3390/jfb14040214] [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: 02/28/2023] [Revised: 03/17/2023] [Accepted: 04/08/2023] [Indexed: 04/28/2023] Open
Abstract
The influence of intracoronal sealing biomaterials on the newly formed regenerative tissue after endodontic revitalisation therapy remains unexplored. The objective of this study was to compare the gene expression profiles of two different tricalcium silicate-based biomaterials alongside the histological outcomes of endodontic revitalisation therapy in immature sheep teeth. The messenger RNA expression of TGF-β, BMP2, BGLAP, VEGFA, WNT5A, MMP1, TNF-α and SMAD6 was evaluated after 1 day with qRT-PCR. For evaluation of histological outcomes, revitalisation therapy was performed using Biodentine (n = 4) or ProRoot white mineral trioxide aggregate (WMTA) (n = 4) in immature sheep according to the European Society of Endodontology position statement. After 6 months' follow-up, one tooth in the Biodentine group was lost to avulsion. Histologically, extent of inflammation, presence or absence of tissue with cellularity and vascularity inside the pulp space, area of tissue with cellularity and vascularity, length of odontoblast lining attached to the dentinal wall, number and area of blood vessels and area of empty root canal space were measured by two independent investigators. All continuous data were subjected to statistical analysis using Wilcoxon matched-pairs signed rank test at a significance level of p < 0.05. Biodentine and ProRoot WMTA upregulated the genes responsible for odontoblast differentiation, mineralisation and angiogenesis. Biodentine induced the formation of a significantly larger area of neoformed tissue with cellularity, vascularity and increased length of odontoblast lining attached to the dentinal walls compared to ProRoot WMTA (p < 0.05), but future studies with larger sample size and adequate power as estimated by the results of this pilot study would confirm the effect of intracoronal sealing biomaterials on the histological outcome of endodontic revitalisation.
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Affiliation(s)
- Elanagai Rathinam
- ELOHA (Equal Lifelong Oral Health for All) Research Group, Paediatric Dentistry, Oral Health Sciences, Ghent University Hospital, 9000 Ghent, Belgium
| | - Sivaprakash Rajasekharan
- ELOHA (Equal Lifelong Oral Health for All) Research Group, Paediatric Dentistry, Oral Health Sciences, Ghent University Hospital, 9000 Ghent, Belgium
| | - Heidi Declercq
- Tissue Engineering and Biomaterials Group, Department of Human Structure and Repair, Ghent University Hospital, Ghent University, 9000 Ghent, Belgium
- Tissue Engineering Laboratory, Department of Development and Regeneration, KU Leuven, 8500 Kortrijk, Belgium
| | - Christian Vanhove
- Medical Imaging & Signal Processing, Infinity Laboratory, Ghent University Hospital, Ghent University, 9000 Ghent, Belgium
| | - Peter De Coster
- Department of Reconstructive Dentistry and Oral Biology, Dental School, Ghent University Hospital, Ghent University, 9000 Ghent, Belgium
| | - Luc Martens
- ELOHA (Equal Lifelong Oral Health for All) Research Group, Paediatric Dentistry, Oral Health Sciences, Ghent University Hospital, 9000 Ghent, Belgium
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Omar N, Abdelraouf RM, Hamdy TM. Effect of different root canal irrigants on push-out bond strength of two novel root-end filling materials. BMC Oral Health 2023; 23:193. [PMID: 37009885 PMCID: PMC10068155 DOI: 10.1186/s12903-023-02858-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 03/06/2023] [Indexed: 04/04/2023] Open
Abstract
BACKGROUND The aim of this in vitro study was to evaluate push-out bond strength of different root-end filling materials using various irrigant solutions. METHODS A push-out bond strength test was performed to evaluate the bond strength of two experimental root-end filling materials: namely, nano-hybrid mineral trioxide aggregate (MTA) and polymethyl methacrylate (PMMA) cement filled with 20% weight nano hydroxyapatite (nHA) fillers compared to conventional MTA. The irrigant solutions employed were sodium hypochlorite (NaOCl) in concentrations 1%, 2.5% and 5.25% and 2% chlorhexidine gluconate (CHX) followed by application of 17% ethylene diamine tetra-acetic acid (EDTA). A freshly extracted sixty single-rooted human maxillary central incisors were used. The crowns were removed, the canal apex was widened to simulate immature teeth. Each type of irrigation protocols was performed. After application and setting of the root-end filling materials, a slice of one mm thickness was cut transversely from the apical end of each root. Specimens were stored for 1 month in artificial saliva and were subjected to a push-out test to evaluate the shear bond strength. Data were analyzed using two-way ANOVA and Tukey test. RESULTS The experimental nano-hybrid MTA showed the highest significant push-out bond strength values when irrigated by NaOCl at several concentrations (1%, 2.5% and 5.25%) (P< 0.05). Meanwhile, irrigation with 2% CHX resulted in highest bond strength values in nano-hybrid white MTA (18 MPa) and PMMA filled with 20% weight nHA (17.4 MPa) with nonsignificant difference between them (p = 0.25). In each root-end filling material, irrigation with 2% CHX led to the highest significant bond strength, followed by NaOCl 1%, while the least significant bond strength was produced after irrigation with NaOCl 2.5% and 5.25% (P< 0.05). CONCLUSION Considering the limitations of this study, it may be concluded that the application of 2% CXH and 17% EDTA provides superior push-out bond strength to root canal dentin compared with irrigation with NaOCl irrigants and 17% EDTA, experimental nano-hybrid MTA root-end filling material provides enhanced shear bond strength than conventional micron-sized MTA root-end filling material.
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Affiliation(s)
- Nada Omar
- Restorative and Dental Materials Department, Oral and Dental Research Institute, National Research Centre (NRC), Giza, Dokki, 12622, Egypt
| | - Rasha M Abdelraouf
- Biomaterials Department, Faculty of Dentistry, Cairo University, Cairo, 11553, Egypt
| | - Tamer M Hamdy
- Restorative and Dental Materials Department, Oral and Dental Research Institute, National Research Centre (NRC), Giza, Dokki, 12622, Egypt.
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27
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Hu X, Li Y, Xu J, Li Q, Wang R. Immature permanent incisors with complicated crown fractures treated with partial pulpotomy using white mineral trioxide aggregate and IRoot BP plus-a retrospective long-term study. Dent Traumatol 2023; 39:165-172. [PMID: 36409268 DOI: 10.1111/edt.12804] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 03/11/2022] [Revised: 10/21/2022] [Accepted: 10/21/2022] [Indexed: 11/23/2022]
Abstract
BACKGROUND/AIMS Calcium silicate cements have been widely used for pulpotomies in immature permanent teeth with complicated crown fractures due to their superior properties. However, few studies have evaluated the long-term outcomes of white mineral trioxide aggregate (WMTA) and iRoot BP Plus for partial pulpotomies. The aim of this study was to investigate the long-term clinical and radiographic outcomes of WMTA and iRoot BP Plus for partial pulpotomies in immature permanent incisors with complicated crown fractures. MATERIALS AND METHODS Children who had partial pulpotomies of immature permanent incisors with complicated crown fractures using WMTA or iRoot BP Plus as capping agents were enrolled. Eighty immature permanent incisors in 68 children (aged 8-13 years) were included. They were divided into two groups (WMTA and iRoot BP Plus) according to the capping agents. Clinical and radiographic information was collected during a 5-year follow-up period. Study data were analyzed using Chi-square tests or Fisher exact tests. RESULTS The clinical and radiographic success rates in the WMTA (n = 36) and iRoot BP Plus groups (n = 44) were 94.4% versus 97.7% and 88.9% versus 97.7%, respectively (both p < .05). The average observation period was 74.5 ± 13.2 months and 61.9 ± 1.6 months in the WMTA and iRoot BP Plus groups, respectively (p < .01). Five cases presented with periapical radiolucencies. The WMTA group had four cases of pulp canal calcification (11.1%), while the iRoot BP Plus group had two cases (4.6%). There was crown discolouration in all cases in the WMTA group, but none in the iRoot BP Plus group. CONCLUSION Both WMTA and iRoot BP Plus had favorable outcomes in promoting physiological development and maintaining the basic functions of immature permanent incisors with complicated crown fractures. As a partial pulpotomy material, iRoot BP Plus may be more suitable for the esthetic zone than WMTA.
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Affiliation(s)
- Xiaoyan Hu
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei, China
| | - Yuexiang Li
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei, China
| | - Jianguang Xu
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei, China
| | - Quanli Li
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei, China
| | - Run Wang
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei, China
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Garcias-Morales D, Palomar VM, Charlot F, Nogué F, Covarrubias AA, Reyes JL. N 6 -Methyladenosine modification of mRNA contributes to the transition from 2D to 3D growth in the moss Physcomitrium patens. Plant J 2023; 114:7-22. [PMID: 36794900 DOI: 10.1111/tpj.16149] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 09/12/2022] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Plants colonized the land approximately 470 million years ago, coinciding with the development of apical cells that divide in three planes. The molecular mechanisms that underly the development of the 3D growth pattern are poorly understood, mainly because 3D growth in seed plants starts during embryo development. In contrast, the transition from 2D to 3D growth in the moss Physcomitrium patens has been widely studied, and it involves a large turnover of the transcriptome to allow the establishment of stage-specific transcripts that facilitate this developmental transition. N6 -Methyladenosine (m6 A) is the most abundant, dynamic and conserved internal nucleotide modification present on eukaryotic mRNA and serves as a layer of post-transcriptional regulation directly affecting several cellular processes and developmental pathways in many organisms. In Arabidopsis, m6 A has been reported to be essential for organ growth and determination, embryo development and responses to environmental signals. In this study, we identified the main genes of the m6 A methyltransferase complex (MTC), MTA, MTB and FIP37, in P. patens and demonstrate that their inactivation leads to the loss of m6 A in mRNA, a delay in the formation of gametophore buds and defects in spore development. Genome-wide analysis revealed several transcripts affected in the Ppmta background. We demonstrate that the PpAPB1-PpAPB4 transcripts, encoding central factors orchestrating the transition from 2D to 3D growth in P. patens, are modified by m6 A, whereas in the Ppmta mutant the lack of the m6 A marker is associated with a corresponding decrease in transcript accumulation. Overall, we suggest that m6 A is essential to enable the proper accumulation of these and other bud-specific transcripts directing the turnover of stage-specific transcriptomes, and thus promoting the transition from protonema to gametophore buds in P. patens.
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Affiliation(s)
- David Garcias-Morales
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Cuernavaca, CP, 62210, Mexico
| | - V Miguel Palomar
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 1105 N. University Ave, Ann Arbor, MI, 48109-1085, USA
| | - Florence Charlot
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France
| | - Fabien Nogué
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France
| | - Alejandra A Covarrubias
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Cuernavaca, CP, 62210, Mexico
| | - José L Reyes
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Cuernavaca, CP, 62210, Mexico
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Cunha D, Souza N, Moreira M, Rodrigues N, Silva P, Franca C, Horsophonphong S, Sercia A, Subbiah R, Tahayeri A, Ferracane J, Yelick P, Saboia V, Bertassoni L. 3D-printed microgels supplemented with dentin matrix molecules as a novel biomaterial for direct pulp capping. Clin Oral Investig 2023; 27:1215-1225. [PMID: 36287273 PMCID: PMC10171721 DOI: 10.1007/s00784-022-04735-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 04/20/2022] [Accepted: 10/01/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To develop a 3D-printed, microparticulate hydrogel supplemented with dentin matrix molecules (DMM) as a novel regenerative strategy for dental pulp capping. MATERIALS AND METHODS Gelatin methacryloyl microgels (7% w/v) mixed with varying concentrations of DMM were printed using a digital light projection 3D printer and lyophilized for 2 days. The release profile of the DMM-loaded microgels was measured using a bicinchoninic acid assay. Next, dental pulp exposure defects were created in maxillary first molars of Wistar rats. The exposures were randomly capped with (1) inert material - negative control, (2) microgels, (3) microgels + DMM 500 µg/ml, (4) microgels + DMM 1000 µg/ml, (5) microgels + platelet-derived growth factor (PDGF 10 ng/ml), or (6) MTA (n = 15/group). After 4 weeks, animals were euthanized, and treated molars were harvested and then processed to evaluate hard tissue deposition, pulp tissue organization, and blood vessel density. RESULTS All the specimens from groups treated with microgel + 500 µg/ml, microgel + 1000 µg/ml, microgel + PDGF, and MTA showed the formation of organized pulp tissue, tertiary dentin, newly formed tubular and atubular dentin, and new blood vessel formation. Dentin bridge formation was greater and pulp necrosis was less in the microgel + DMM groups compared to MTA. CONCLUSIONS The 3D-printed photocurable microgels doped with DMM exhibited favorable cellular and inflammatory pulp responses, and significantly more tertiary dentin deposition. CLINICAL RELEVANCE 3D-printed microgel with DMM is a promising biomaterial for dentin and dental pulp regeneration in pulp capping procedures.
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Affiliation(s)
- Diana Cunha
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Nayara Souza
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Manuela Moreira
- School of Dentistry, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Nara Rodrigues
- School of Dentistry, University of Fortaleza, Fortaleza, Ceará, Brazil
| | - Paulo Silva
- School of Dentistry, University of Fortaleza, Fortaleza, Ceará, Brazil
| | - Cristiane Franca
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Sivaporn Horsophonphong
- Department of Pediatric Dentistry, Faculty of Dentistry, Mahidol University, Salaya, Thailand
| | - Ashley Sercia
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Ramesh Subbiah
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Anthony Tahayeri
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Jack Ferracane
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Pamela Yelick
- Department of Orthodontics, School of Medicine, School of Engineering, Tufts University, Boston, MA, 02111, USA
| | - Vicente Saboia
- Department of Restorative Dentistry, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Luiz Bertassoni
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
- Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA.
- Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA.
- Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA.
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Ishikawa T, Hasegawa I, Hirosawa H, Honmou T, Sakai N, Igarashi T, Yamazaki S, Kobayashi T, Sato T, Iwanaga A, Sano T, Yokoyama J, Honma T. An Investigation of Popping During Radiofrequency Ablation After Lenvatinib Administration for Hepatocellular Carcinoma. In Vivo 2023; 37:836-840. [PMID: 36881054 PMCID: PMC10026646 DOI: 10.21873/invivo.13150] [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: 01/11/2023] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 03/08/2023]
Abstract
BACKGROUND/AIM Lenvatinib is available as a molecular target agent for hepatocellular carcinoma (HCC). In this study, we investigated the popping phenomena in patients with HCC who underwent radiofrequency ablation (RFA) after taking lenvatinib. PATIENTS AND METHODS Fifty-nine patients with HCC between 21-30 mm in diameter and no history of systemic treatment were enrolled in the study. The patients underwent RFA using a VIVA RFA SYSTEM with an ablation tip of 30 mm in length. For the initial lenvatinib administration, 16 patients had an adequate course of treatment and were treated with RFA as add-on therapy (combination group). The other 43 patients were treated by RFA monotherapy (monotherapy group). The popping frequency during RFA was recorded and compared. RESULTS Popping frequency in the combination group (RFA combined with lenvatinib) was significantly higher than that in the monotherapy group. There was no significant difference between the combination group and the monotherapy group in ablation time, maximum output level, tumour temperature after ablation, or initial resistance value. CONCLUSION Popping frequency was significantly higher in the combination group. It is possible that the intra-tumour temperature increased rapidly during RFA in the combination group due to the inhibitory effect of lenvatinib on tumour angiogenesis, leading to the occurrence of popping. Further studies are needed to investigate popping after RFA, and precise protocols need to be developed.
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Affiliation(s)
- Toru Ishikawa
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan;
| | - Iori Hasegawa
- Department of Clinical Engineering, Saiseikai Niigata Hospital, Niigata, Japan
| | - Hiroshi Hirosawa
- Department of Clinical Engineering, Saiseikai Niigata Hospital, Niigata, Japan
| | - Tsubasa Honmou
- Department of Clinical Engineering, Saiseikai Niigata Hospital, Niigata, Japan
| | - Nobuyuki Sakai
- Department of Clinical Engineering, Saiseikai Niigata Hospital, Niigata, Japan
| | - Takanori Igarashi
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - Shun Yamazaki
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - Takamasa Kobayashi
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - Toshifumi Sato
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - Akito Iwanaga
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - Tomoe Sano
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - Junji Yokoyama
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - Terasu Honma
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
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Durán CR, Gancedo-Caravia DL, González VV, Losada CG. Push out bond strength of hydraulic cements used at different thicknesses. BMC Oral Health 2023; 23:81. [PMID: 36750823 PMCID: PMC9906962 DOI: 10.1186/s12903-023-02758-w] [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: 11/05/2022] [Accepted: 01/22/2023] [Indexed: 02/09/2023] Open
Abstract
BACKGROUND The aim of this study was to compare the pushout bond strength (POBS) of three hydraulic cements, when used at thicknesses of 3 and 5 mm. METHODS 78 root slices of 3 and 5 mm of thickness were obtained from human teeth. Cylindrical cavities of 1.4 mm of diameter were drilled and filled with Biodentine (BD), Totalfill Root Repair paste (TF) or ProRoot MTA White (PMTA). Pushout tests were performed 21 days later. The fracture pattern of each sample was also analyzed. POBS data were analyzed with Welch and Brown-Forsythe and Tamhane's post hoc tests and a Weibull analysis was also performed. RESULTS In the 3 mm group, TF showed significantly lower bond strength than BD and PMTA. In the 5 mm group, BD showed significantly higher bond strength than TF. Both BD and TF showed higher bond strength when the thickness of the sample increased, while PMTA did not. CONCLUSIONS TF and BD achieve higher pushout bond strength resistance when used at a thickness of 5 mm than at 3 mm, while the mean resistance of PMTA is less influenced by the thickness. At 5 mm of thickness, BD and PMTA exhibit similar resistance to displacement. However, the behavior of BD is more predictable than that of its predecessor. BD is a reliable hydraulic cement for clinical situations where thick cavities need to be filled and displacement resistance plays an important role. Clinicians need to consider choosing specific hydraulic cements according to the thickness of material to be used.
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Affiliation(s)
- C. Ruiz Durán
- grid.4795.f0000 0001 2157 7667Department of Consevative and Prosthetic Dentistry, School of Dentistry, Complutense University, Pza de Ramón y Cajal s/n, Ciudad Universitaria, 28040 Madrid, Spain
| | - Dra L. Gancedo-Caravia
- grid.4795.f0000 0001 2157 7667Department of Consevative and Prosthetic Dentistry, School of Dentistry, Complutense University, Pza de Ramón y Cajal s/n, Ciudad Universitaria, 28040 Madrid, Spain
| | - V. Vera González
- grid.4795.f0000 0001 2157 7667Department of Consevative and Prosthetic Dentistry, School of Dentistry, Complutense University, Pza de Ramón y Cajal s/n, Ciudad Universitaria, 28040 Madrid, Spain
| | - C. González Losada
- grid.4795.f0000 0001 2157 7667Department of Consevative and Prosthetic Dentistry, School of Dentistry, Complutense University, Pza de Ramón y Cajal s/n, Ciudad Universitaria, 28040 Madrid, Spain
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Chuong NN, Doan PPT, Wang L, Kim JH, Kim J. Current Insights into m 6A RNA Methylation and Its Emerging Role in Plant Circadian Clock. Plants (Basel) 2023; 12:624. [PMID: 36771711 PMCID: PMC9920239 DOI: 10.3390/plants12030624] [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] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
N6-adenosine methylation (m6A) is a prevalent form of RNA modification found in the expressed transcripts of many eukaryotic organisms. Moreover, m6A methylation is a dynamic and reversible process that requires the functioning of various proteins and their complexes that are evolutionarily conserved between species and include methylases, demethylases, and m6A-binding proteins. Over the past decade, the m6A methylation process in plants has been extensively studied and the understanding thereof has drastically increased, although the regulatory function of some components relies on information derived from animal systems. Notably, m6A has been found to be involved in a variety of factors in RNA processing, such as RNA stability, alternative polyadenylation, and miRNA regulation. The circadian clock in plants is a molecular timekeeping system that regulates the daily and rhythmic activity of many cellular and physiological processes in response to environmental changes such as the day-night cycle. The circadian clock regulates the rhythmic expression of genes through post-transcriptional regulation of mRNA. Recently, m6A methylation has emerged as an additional layer of post-transcriptional regulation that is necessary for the proper functioning of the plant circadian clock. In this review, we have compiled and summarized recent insights into the molecular mechanisms behind m6A modification and its various roles in the regulation of RNA. We discuss the potential role of m6A modification in regulating the plant circadian clock and outline potential future directions for the study of mRNA methylation in plants. A deeper understanding of the mechanism of m6A RNA regulation and its role in plant circadian clocks will contribute to a greater understanding of the plant circadian clock.
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Affiliation(s)
- Nguyen Nguyen Chuong
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
| | - Phan Phuong Thao Doan
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
| | - Lanshuo Wang
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
| | - Jin Hee Kim
- Subtropical Horticulture Research Institute, Jeju National University, Jeju 690756, Republic of Korea
| | - Jeongsik Kim
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
- Subtropical Horticulture Research Institute, Jeju National University, Jeju 690756, Republic of Korea
- Faculty of Science Education, Jeju National University, Jeju 690756, Republic of Korea
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Singh S, Gaurav SS, Vasistha NK, Kumar U, Joshi AK, Mishra VK, Chand R, Gupta PK. Genetics of spot blotch resistance in bread wheat ( Triticum aestivum L.) using five models for GWAS. Front Plant Sci 2023; 13:1036064. [PMID: 36743576 PMCID: PMC9891466 DOI: 10.3389/fpls.2022.1036064] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 12/28/2022] [Indexed: 06/18/2023]
Abstract
Genetic architecture of resistance to spot blotch in wheat was examined using a Genome-Wide Association Study (GWAS) involving an association panel comprising 303 diverse genotypes. The association panel was evaluated at two different locations in India including Banaras Hindu University (BHU), Varanasi (Uttar Pradesh), and Borlaug Institute for South Asia (BISA), Pusa, Samastipur (Bihar) for two consecutive years (2017-2018 and 2018-2019), thus making four environments (E1, BHU 2017-18; E2, BHU 2018-19; E3, PUSA, 2017-18; E4, PUSA, 2018-19). The panel was genotyped for 12,196 SNPs based on DArT-seq (outsourced to DArT Ltd by CIMMYT); these SNPs included 5,400 SNPs, which could not be assigned to individual chromosomes and were therefore, described as unassigned by the vendor. Phenotypic data was recorded on the following three disease-related traits: (i) Area Under Disease Progress Curve (AUDPC), (ii) Incubation Period (IP), and (iii) Lesion Number (LN). GWAS was conducted using each of five different models, which included two single-locus models (CMLM and SUPER) and three multi-locus models (MLMM, FarmCPU, and BLINK). This exercise gave 306 MTAs, but only 89 MTAs (33 for AUDPC, 30 for IP and 26 for LN) including a solitary MTA detected using all the five models and 88 identified using four of the five models (barring SUPER) were considered to be important. These were used for further analysis, which included identification of candidate genes (CGs) and their annotation. A majority of these MTAs were novel. Only 70 of the 89 MTAs were assigned to individual chromosomes; the remaining 19 MTAs belonged to unassigned SNPs, for which chromosomes were not known. Seven MTAs were selected on the basis of minimum P value, number of models, number of environments and location on chromosomes with respect to QTLs reported earlier. These 7 MTAs, which included five main effect MTAs and two for epistatic interactions, were considered to be important for marker-assisted selection (MAS). The present study thus improved our understanding of the genetics of resistance against spot blotch in wheat and provided seven MTAs, which may be used for MAS after due validation.
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Affiliation(s)
- Sahadev Singh
- Molecular Biology Laboratory, Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, India
| | - Shailendra Singh Gaurav
- Molecular Biology Laboratory, Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, India
| | - Neeraj Kumar Vasistha
- Department of Genetics-Plant Breeding and Biotechnology, Dr Khem Singh Gill, Akal College of Agriculture, Eternal University, Sirmaur, India
| | - Uttam Kumar
- Borlaug Institute for South Asia (BISA), Ludhiana, India
| | - Arun Kumar Joshi
- The International Maize and Wheat Improvement Center (CIMMYT), Borlaug Institute for South Asia (BISA), G-2, B-Block, NASC Complex, DPS Marg, New Delhi, India
| | - Vinod Kumar Mishra
- Department of Genetics and Plant Breeding, Indian Institute of Agricultural Science, Banaras Hindu University, Varanasi, India
| | - Ramesh Chand
- Department of Mycology and Plant Pathology, Indian Institute of Agricultural Science Banaras Hindu University, Varanasi, India
| | - Pushpendra Kumar Gupta
- Molecular Biology Laboratory, Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, India
- Borlaug Institute for South Asia (BISA), Ludhiana, India
- Murdoch’s Centre for Crop & Food Innovation, Murdoch University, Murdoch, WA, Australia
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Panda P, Govind S, Sahoo SK, Pattanaik S, Mallikarjuna RM, Nalawade T, Saraf S, Khaldi NA, Jahdhami SA, Shivagange V, Jena A. Analysis of Pulp Tissue Viability and Cytotoxicity of Pulp Capping Agents. J Clin Med 2023; 12. [PMID: 36675467 DOI: 10.3390/jcm12020539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/23/2022] [Accepted: 01/07/2023] [Indexed: 01/11/2023] Open
Abstract
The present research study assessed the cell viability and cytotoxic effect of mineral tri-oxide aggregate (MTA), Tetric N-Bond Universal bonding agent, Theracal PT (pulpotomy treatment), and platelet-rich fibrin (PRF) as pulp capping agents on human dental pulp stem cells (hDPSCs). The cells were isolated from the pulp tissue of an extracted healthy permanent third molar. After four passages in Dulbecco’s Modified Eagle’s Medium, the primary cells were employed for the investigation. The test materials and untreated cells (negative control) were subjected to an Methylthiazol-diphenyl-tetrazolium (MTT) cytotoxicity assay and assessed at 24-, 48-, and 72-h intervals. The Wilcoxon matched-paired t-test and Kruskal−Wallis analysis of variance (ANOVA) test were applied (p < 0.05). PRF imparted the highest cell viability at 48 h (p < 0.001), followed by MTA, Theracal PT, and Tetric N-Bond. Similarly, PRF had the highest potential to enhance cell proliferation and differentiation (p < 0.001), followed by Theracal PT, MTA, and the bonding agent at the end of 24 h and 72 h, respectively. Finally, PRF sustained the viability of human primary dental pulp stem cells more effectively than Theracal PT and MTA; however, the application of a Tetric N-Bond as a pulp capping agent was ineffective.
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Madarati AA, Sammani AMN, Alnazzawi AA, Alrahlah A. Efficiency of the new reciprocating and rotary systems with or without ultrasonics in removing root-canals filling with calcium silicate-based sealer ( MTA). BMC Oral Health 2023; 23:5. [PMID: 36597070 PMCID: PMC9811723 DOI: 10.1186/s12903-022-02684-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 06/26/2022] [Accepted: 12/21/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND To compare the efficiency of endodontic rotary and reciprocating systems in removing calcium silicate-sealer based fillings and to investigate the impact of passive ultrasonic irrigation (PUI) on their efficiency. MATERIALS AND METHODS 160 root-canals were instrumented, filled with gutta-percha and calcium silicate based-sealer and divided into 10 equal groups. Five groups in which the reciprocating systems (WaveOne-Gold, Reciproc-Blue and R-Motion) and rotary systems (Fanta-AF-One and Tango-Endo) were used to remove root-canals' fillings. In the other five groups the fillings were removed by the same systems then additionally with PUI. The times to complete retreatments procedures were recorded. Micro-computed tomography's analysis of the root-canals fillings' volume before and after retreatments was used to determine the remaining filling materials (RFMs) volumes. RESULTS The RFMs after using rotary systems (10.1%) was greater than after using reciprocating systems (3.8%) (P < 0.001). The RFMs after using WOG (2%) and RB systems (2.6%) were less than those in the RM (6.8%), TE (9.5%) and FAFO (10.7%) systems [P < 0.05]. The times required to remove the filling materials using the TE (3.7 min), FAFO (4.1 min) and RM (4.1 min) systems were shorter than those required by the RB (5.4 min) and WOG (4.9 min) systems [P < 0.05]. Using PUI resulted in less RFMs (1.44%) when compared to using only rotary or reciprocating systems (6.27%) [P < 0.001]. CONCLUSIONS Endodontic reciprocation systems were more effective, but needed longer times than rotary systems in removing calcium silicate based- sealers fillings. The PUI significantly improved removal of the root-canals' filling materials. CLINICAL RELEVANCE Reciprocating systems and PUI are recommended whenever root-canals retreatment is considered regardless of using calcium silicate-based sealers.
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Affiliation(s)
- Ahmad A. Madarati
- grid.412892.40000 0004 1754 9358Restorative Dental Sciences Department, College of Dentistry, Taibah University, Madina, Kingdom of Saudi Arabia ,Riyadh, 13311 Kingdom of Saudi Arabia
| | - Aya M. N. Sammani
- grid.412892.40000 0004 1754 9358Department of Substitutive Dental Sciences, College of Dentistry, Taibah University, Madina, Kingdom of Saudi Arabia
| | - Ahmad A. Alnazzawi
- grid.412892.40000 0004 1754 9358Department of Substitutive Dental Sciences, College of Dentistry, Taibah University, Madina, Kingdom of Saudi Arabia
| | - Ali Alrahlah
- grid.56302.320000 0004 1773 5396Restorative Dental Sciences Department, Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia
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Zafari J, Jouni FJ, Nikzad F, Esmailnasab S, Javan ZA, Karkehabadi H. Combination of Dental-Capping Agents with Low Level Laser Therapy Promotes Proliferation of Stem Cells from Apical Papilla. Photobiomodul Photomed Laser Surg 2023; 41:3-9. [PMID: 36577035 DOI: 10.1089/photob.2022.0072] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 12/29/2022] Open
Abstract
Background: Direct pulp capping is a vital pulp therapy, which stimulates differentiation of stem cells from apical papilla (SCAPs). SCAPs have multipotential capacity to differentiate into types of cells, contributing to the regeneration of tissues. Objective: Considering the promising effects of dental-capping materials, we aim to investigate the effect of dental dressing materials combined with laser therapy on the percentage of SCAP viability and the consequent dental regeneration capacity. Methods: We collected two immature third molar teeth and isolated SCAPs through collagenase type I enzymatic activity. Isolated SCAPs were then cultured with Dulbecco's modified Eagle's medium and α-minimum essential medium enriched with 15% and 10% fetal bovine serum, respectively. After reaching 70-80% confluency, cells were seeded in a 96-well plate and then treated with mineral trioxide aggregate (MTA), enamel matrix derivative (EMD), biodentine, and low level laser therapy (LLLT) alone and in combination for 24, 48, and 168 h. After that, cell survival rate was assessed using (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) (MTT) assay. Results: We found that combination of MTA, EMD, and LLLT as well as that of biodentine, EMD, and LLLT could lead to significant increase of SCAP viability as compared with other treatment groups. Combination of MTA and biodentine with EMD could also show increased level of SCAP proliferation and viability. However, MTA and biodentine alone reduced SCAP survival rate in all time points. Conclusions: Our conclusion is that LLLT can serve as an enhancer of SCAP proliferation and differentiation rate when added to dental-capping agents such as MTA, EMD, and biodentine. Thus, LLLT combination with effective capping materials will serve as a promising option for dental tissue repair.
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Affiliation(s)
- Jaber Zafari
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Fatemeh Javani Jouni
- Department of Biochemistry and Biophysics, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Forough Nikzad
- Department of Endodontics, Dental School, Hamadan University of Medical Science, Hamadan, Iran
| | - Sogand Esmailnasab
- Department of Endodontics, Dental School, Hamadan University of Medical Science, Hamadan, Iran
| | - Zahra Abbasi Javan
- Department of Endodontics, Dental School, Hamadan University of Medical Science, Hamadan, Iran
| | - Hamed Karkehabadi
- Department of Endodontics, Dental School, Hamadan University of Medical Science, Hamadan, Iran
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Modaresi J, Nasr N. Nonsurgical Endodontic Management of Large Periapical Lesion with Cold Ceramic: A Literature Review and Case Series. Iran Endod J 2023; 18:113-121. [PMID: 37152858 PMCID: PMC10155105 DOI: 10.22037/iej.v18i2.40184] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/19/2023] [Accepted: 03/16/2023] [Indexed: 05/09/2023]
Abstract
Introduction The purpose of this review is to investigate the contribution of non-surgical endodontic treatment in the healing process of large periapical lesions as well as looking over other potential non-surgical endodontic treatment options. Materials and Methods two females and one male patient were referred to the private office, complaining of having pain in the anterior maxillary region which was pertinent to the presence of a large periapical lesion, and subsequently were managed by a non-surgical endodontic approach using cold ceramic. The archive of PubMed and Google Scholar databases was also searched for finding relevant articles in which a nonsurgical endodontic approach was performed to improve the healing process of large periapical lesions. Results Clinical examination of the case series subjects revealed no signs and symptoms following treatment while relative improvement of the lesion and apical closure was apparent in radiographs 7 months, 9 months, and 4 years subsequently. In twenty-two reviewed clinical trials, a total number of 107 teeth with large periapical lesions were treated by nonsurgical endodontic approaches using MTA, biodentine, gutta-percha, and bioceramic iRoot Bp plus. Complete healing occurred in 38 cases (35.5%) after 12-17 months. Conclusions Although surgical interventions have been used previously in the management of large periapical lesions, a nonsurgical endodontic approach with cold ceramic seems to be effective, leading to complete healing of the periapical lesion in treated subjects. Further clinical research is recommended to identify the effectiveness of cold ceramic for the treatment of extensive periapical lesions.
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Affiliation(s)
- Jalil Modaresi
- Department of Endodontics, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Nazanin Nasr
- Department of Endodontics, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Corresponding author: Nasr Nazanin, Faculty of Dentistry, Daheye Fajr BLV, Imam Ave, Po Box: 89195/165 Yazd, Iran. E-mail:
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Moazzami F, Ghorbani Jahandizi N, Shokouhi MM, Ghahramani Y. Sealing Ability of Nano-fast Cement vs. Mineral Trioxide Aggregate as Retrograde Apical Plugs: An In-vitro Microleakage Study. Iran Endod J 2023; 18:206-210. [PMID: 37829831 PMCID: PMC10566006 DOI: 10.22037/iej.v18i4.41642] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 07/04/2023] [Accepted: 07/17/2023] [Indexed: 10/14/2023]
Abstract
Introduction Apical surgery aims to eradicate the apical part of the root and the lesion to enhance the healing. The sealing ability of retrograde filling material is an essential factor affecting the success rate of the surgery. Mineral trioxide aggregate (MTA) is the gold standard of retrograde filling materials, with approved sealing capability and biocompatibility. Newly introduced root repair material with an approved antibacterial effect similar to MTA is Nano-fast cement (NFC) which should be investigated for its sealing ability. This study aimed to evaluate the sealing ability of NFC vs. MTA. Materials and Methods Root apices of 48 single-rooted teeth were resected at 90 degrees and were prepared at 3 mm depth. The teeth were randomly divided into 2 experimental groups (n=21), negative control group (n=3), and positive control group (n= 3). MTA and NFC plugs were condensed as retrograde filling material. The samples were evaluated by a modified fluid filtration device for 1 hour. The measurement was conducted at 24 h, 1, and 3 months. Data were analyzed by Friedman Test and Kruskal-Wallis test. Results According to the results, NFC at 3-months interval showed the least microleakage, and MTA had the highest at the baseline. However, the results between the two groups were not statistically significant in all intervals. NFC reached the ideal sealing ability within 1 month, which was reached for MTA after 3 months. Conclusions The results of this in vitro study showed that the microleakage value of NFC is comparable to MTA. In light of current findings, NFC shows characteristics of a suitable calcium silicate-based cement. Further clinical researches are needed to introduce the NFC as retrograde apical plug or for other endodontic applications.
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Affiliation(s)
- Fariborz Moazzami
- Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran;
| | | | - Mohammad Mehdi Shokouhi
- Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran;
| | - Yasamin Ghahramani
- Department of Endodontics, Faculty of Dentistry, Oral and Dental Disease Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Najmi MA, Nayab T, Alam BF, Abbas T, Ashgar S, Hussain T, Qasim SSB, Heboyan A. Role of mineral trioxide aggregate in dentistry: A bibliometric analysis using Scopus database. J Appl Biomater Funct Mater 2023; 21:22808000231154065. [PMID: 36785515 DOI: 10.1177/22808000231154065] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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] [Indexed: 02/15/2023] Open
Abstract
OBJECTIVES Mineral trioxide aggregate (MTA) has a long history of providing predictable clinical outcomes in dental applications especially in endodontic procedures. This bibliometric analysis aimed at evaluating the advancements of research in mineral trioxide aggregate and its use in the field of dentistry, together with the detection of most significant authors, organizations, countries, journals, papers, and the exploration of commonly used keywords using a structured approach. MATERIALS AND METHOD The search was conducted using the Elsevier's Scopus database, gathering publication information related to MTA published from 1993 and 2021 July. Metadata comprising of titles, abstracts, keywords, authors, organizations, and countries were obtained. Bibliometric evaluators with respect to authors, articles published, journals, keywords, and top countries were scrutinized. Data was analyzed using VOS viewer. RESULTS Between 1993 and 2021, an uptrend in the research performed on MTA was identified. Researchers from United States, Brazil, and Iran actively contributed on MTA, while papers from USA were highly cited. The Journal of Endodontics along with International Endodontic Journal were the top contributing academic journals. Hacettepe University, Turkey and Cardiff University from United Kingdom were the top most contributing organizations. Mahmoud Torabinejad was the most cited author. Most commonly used keywords included Mineral trioxide aggregate, silicate, oxide, root canal filling material. CONCLUSION The global rise in the number of publications on mineral trioxide aggregate, tremendous networking and citations have been identified amongst various organizations, authors, and nations through this bibliometric analysis.
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Affiliation(s)
- Muhammad Arqam Najmi
- Department of Dental Materials, Bahria University Dental College, Karachi, Pakistan
| | - Talha Nayab
- Department of Dental Materials Science, Sindh Institute of Oral Health Sciences, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Beenish Fatima Alam
- Department of Oral Biology, Bahria University Dental College, Karachi, Pakistan
| | - Tanveer Abbas
- School of Health and society, University of Wollongong, Wollongong, Australia
| | - Shama Ashgar
- Department of Operative Dentistry, Bahria University Dental College, Karachi, Pakistan
| | - Talib Hussain
- Department of Oral Biology, Women Medical and Dental College, Abbottabad, Pakistan
| | - Syed Saad Bin Qasim
- Department of Bioclinical Sciences, Faculty of Dentistry, Kuwait University, Safat, Kuwait
| | - Artak Heboyan
- Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University after Mkhitar Heratsi, Yerevan, Armenia
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Samiei M, Adibkia K, Ghasemi N, Tupal A, Mohaghegh S. Effect of Silver Nanoparticles of Herbal Origin on the Compressive and Push-out Bond Strengths of Mineral Trioxide Aggregate. Iran Endod J 2023; 18:159-164. [PMID: 37431522 PMCID: PMC10329756 DOI: 10.22037/iej.v18i3.31364] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 05/23/2023] [Accepted: 06/10/2023] [Indexed: 07/12/2023]
Abstract
Introduction The purpose of this in vitro study was to investigate the effect of incorporating silver nanoparticles (AgNPs) of herbal origin into mineral trioxide aggregate (MTA) on the push-out bond strength (PBS) and compressive strength (CS) in simulated furcal area perforations. Materials and Methods In this in vitro study, simulated furcal area perforations (1.3 mm in diameter and 2 mm in depth) were created in 40 extracted human lower molar teeth, which were divided into two groups (n=20): MTA alone and MTA combined with AgNPs (2% wt). Using a universal testing machine, PBS was evaluated by performing push-out tests, while CS was assessed using cylindrical specimens. The normal distribution of data was checked using the Kolmogorov-Smirnov test, and statistical analysis was performed using two-way ANOVA. Results The CS results showed no significant difference between the MTA group at 4 and 21 days (P=0.297), but a significant difference was observed in the nanosilver/MTA group (P=0.013). However, there was no significant difference in the push-out bond strength among the study groups (P>0.05). Conclusion The incorporation of herbal origin silver nanoparticles did not significantly affect the PBS or CS of MTA.
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Affiliation(s)
- Mohammad Samiei
- Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran;
| | - Khosro Adibkia
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute and Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;
| | - Negin Ghasemi
- Dental and Periodontal Research Center, Dental School, Department of Endodontics, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ayda Tupal
- Dental and Periodontal Research Center, Dental School, Department of Endodontics, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Seraj Mohaghegh
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute and Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;
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Flores-Ledesma A, Tejeda-Cruz A, Moyaho-Bernal MA, Wintergerst A, Moreno-Vargas YA, Rodríguez-Chávez JA, Cuevas-Suárez CE, Gutiérrez-Estrada K, Arenas-Alatorre JA. Physical properties, marginal adaptation and bioactivity of an experimental mineral trioxide aggregate-like cement modified with bioactive materials. J Oral Sci 2023; 65:141-147. [PMID: 36990760 DOI: 10.2334/josnusd.22-0449] [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: 03/31/2023]
Abstract
PURPOSE To evaluate the effect of adding wollastonite and bioactive glass to an experimental mineral trioxide aggregate-like cement (MTA) on the dimensional stability, compressive strength, solubility, bioactivity, and marginal adaptation by scanning electron microscopy (SEM) and X-ray diffraction (XRD). METHODS Four groups were evaluated at 7, 14, and 21 days: MTA Angelus, experimental MTA-like cement (MTA Exp), BG10 (MTA Exp+10 wt% bioactive glass), and WO20 (MTA Exp+20 wt% wollastonite). To evaluate marginal adaptation, extracted teeth were endodontically obturated and root-end cavities were prepared and filled with the tested materials. RESULTS Cements with bioactive materials showed minimal dimensional changes. Adding wollastonite or bioactive glass to MTA Exp reduces the compressive strength but does not affect solubility. Bismite (Bi2O3), larnite (Ca2SiO4), calcite (CaCO3) and carbonated hydroxyapatite (Ca5[PO4,CO3]3[OH]) were identified in the four cements; ettringite (Ca6Al2[SO4]3[OH]12·26H2O) and bismutite ([BiO]2CO3) were only observed in MTA Exp, BG10, and WO20. Cement-dentin interfaces were not observed after 14 days on the BG10 and WO20 cement composites due to the ettringite formation. CONCLUSION Acicular growing crystals typical of hydroxyapatite were found on the surfaces of all cements. An improved marginal adaptation was observed with the addition of wollastonite or bioactive glass.
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Affiliation(s)
- Abigailt Flores-Ledesma
- Dental Materials and Biomaterials Laboratory Faculty of Stomatology, Meritorious Autonomous University of Puebla
| | - Adriana Tejeda-Cruz
- X-Ray Laboratory, Materials Research Institute, National Autonomous University of México
| | - María A Moyaho-Bernal
- Dental Materials and Biomaterials Laboratory Faculty of Stomatology, Meritorious Autonomous University of Puebla
| | - Ana Wintergerst
- Postgraduate Studies and Research Division, School of Dentistry, National Autonomous University of México
| | - Yoshamin A Moreno-Vargas
- Crystallophysics and Natural Materials Laboratory, Institute of Physics, National Autonomous University of México
| | | | - Carlos E Cuevas-Suárez
- Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of the State of Hidalgo
| | - Kenya Gutiérrez-Estrada
- Postgraduate Studies and Research Division, School of Dentistry, National Autonomous University of México
- Private Practice
| | - Jesús A Arenas-Alatorre
- Central Microscopy Laboratory, Institute of Physics, National Autonomous University of México
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Zanjad SR, Justin RM, Patil PN, Sarda AS, Srivastava HM, Darade LD. Comparison of fracture resistance of simulated immature teeth using four different commercially available apexification materials - An in vitro study. Indian J Dent Res 2023; 34:75-79. [PMID: 37417062 DOI: 10.4103/ijdr.ijdr_763_22] [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: 07/08/2023] Open
Abstract
Introduction The aim of this study was to compare the fracture resistance of simulated immature teeth using four different apical plug materials, i.e. Pro- Root MTA, Neo- MTA Plus, Biodentine, and Bioactive Glass. Materials and Methods 80 extracted human maxillary anterior teeth were divided into 4 groups for this study. They were prepared using Peeso reamers to simulate immature teeth and to mimic Cvek's stage 3 of root development. A 5 mm apical barrier was placed using different materials. The remaining canal was obturated using gutta-percha and AH plus sealer. The final samples were stored at 37°C and 100% humidity for 4 weeks. Fracture resistance of the teeth was measured in Newtons using a universal testing machine. The comparison of fracture resistance between the four groups was done using Kruskal Walis ANOVA followed by post hoc Mann Whitney U test for pairwise comparison. Results Biodentine group showed the highest fracture resistance as compared to the other three groups and the difference was highly significant (P < 0.001). Conclusions Biodentine can be advocated over MTA as an effective material for the management of teeth with wide open apex. Bioactive glass also has shown promising results in increasing the fracture resistance of simulated immature teeth.
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Affiliation(s)
- Supriya R Zanjad
- Department of Conservative Dentistry and Endodontics, Aditya Dental College, Beed, Maharashtra, India
| | - Robert M Justin
- Department of Conservative Dentistry and Endodontics, Aditya Dental College, Beed, Maharashtra, India
| | - Pranjali N Patil
- Department of Conservative Dentistry and Endodontics, Aditya Dental College, Beed, Maharashtra, India
| | - Aditi S Sarda
- Department of Conservative Dentistry and Endodontics, Aditya Dental College, Beed, Maharashtra, India
| | - Himanshu M Srivastava
- Department of Conservative Dentistry and Endodontics, Aditya Dental College, Beed, Maharashtra, India
| | - Lalit D Darade
- Department of Conservative Dentistry and Endodontics, D.Y. Patil Dental College, Navi Mumbai, Maharashtra, India
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Al-Ahmad A, Haendel M, Altenburger MJ, Karygianni L, Hellwig E, Wrbas KT, Vach K, Tennert C. Biodentine Inhibits the Initial Microbial Adhesion of Oral Microbiota In Vivo. Antibiotics (Basel) 2022; 12. [PMID: 36671205 DOI: 10.3390/antibiotics12010004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
This study aimed to evaluate the in vivo initial microbial adhesion of oral microorganisms on the biomaterial Biodentine compared to MTA and AH Plus. Cylindrical samples of the materials were prepared, and dentin slabs served as a control. An individual intraoral lower jaw splint served as a carrier for the samples and was worn by six volunteers. The specimens were worn for 120 min. Adherent bacteria were quantified by determining the colony-forming units (CFUs), while the visualization and quantification of total adherent microorganisms were facilitated by using DAPI and live/dead staining combined with fluorescence microscopy. Bovine dentin had a significantly higher number of aerobic CFUs compared to Biodentine (p = 0.017) and MTA (p = 0.013). The lowest amounts of DAPI-stained adherent microorganisms were quantified for Biodentine (15% ± 9%) and the control (18% ± 9%), while MTA showed the highest counts of initially adherent microorganisms (38% ± 10%). Significant differences were found for MTA and Biodentine (p = 0.004) as well as for MTA and the control (p = 0.021) and for AH Plus and the control (p = 0.025). Biodentine inhibited microbial adherence, thereby yielding an antimicrobial effectivity similar to that of MTA.
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Abhijith KP, Gopala Krishnan S, Ravikiran KT, Dhawan G, Kumar P, Vinod KK, Bhowmick PK, Nagarajan M, Seth R, Sharma R, Badhran SK, Bollinedi H, Ellur RK, Singh AK. Genome-wide association study reveals novel genomic regions governing agronomic and grain quality traits and superior allelic combinations for Basmati rice improvement. Front Plant Sci 2022; 13:994447. [PMID: 36544876 PMCID: PMC9760805 DOI: 10.3389/fpls.2022.994447] [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] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 11/09/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Basmati is a speciality segment in the rice genepool characterised by explicit grain quality. For the want of suitable populations, genome-wide association study (GWAS) in Basmati rice has not been attempted. MATERIALS To address this gap, we have performed a GWAS on a panel of 172 elite Basmati multiparent population comprising of potential restorers and maintainers. Phenotypic data was generated for various agronomic and grain quality traits across seven different environments during two consecutive crop seasons. Based on the observed phenotypic variation, three agronomic traits namely, days to fifty per cent flowering, plant height and panicle length, and three grain quality traits namely, kernel length before cooking, length breadth ratio and kernel length after cooking were subjected to GWAS. Genotyped with 80K SNP array, the population was subjected to principal component analysis to stratify the underlying substructure and subjected to the association analysis using Bayesian-information and Linkage-disequilibrium Iteratively Nested Keyway (BLINK) model. RESULTS We identified 32 unique MTAs including 11 robust MTAs for the agronomic traits and 25 unique MTAs including two robust MTAs for the grain quality traits. Six out of 13 robust MTAs were novel. By genome annotation, six candidate genes associated with the robust MTAs were identified. Further analysis of the allelic combinations of the robust MTAs enabled the identification of superior allelic combinations in the population. This information was utilized in selecting 77 elite Basmati rice genotypes from the panel. CONCLUSION This is the first ever GWAS study in Basmati rice which could generate valuable information usable for further breeding through marker assisted selection, including enhancing of heterosis.
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Affiliation(s)
- Krishnan P. Abhijith
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - S. Gopala Krishnan
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | | | - Gaurav Dhawan
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Pankaj Kumar
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | | | | | - Mariappan Nagarajan
- Rice Breeding and Genetics Research Centre, ICAR-Indian Agricultural Research Institute, Aduthurai, Tamil Nadu, India
| | - Rakesh Seth
- Regional Station, ICAR-Indian Agricultural Research Institute, Karnal, Haryana, India
| | - Ritesh Sharma
- Basmati Export Development Foundation (BEDF), Meerut, Uttar Pradesh, India
| | | | - Haritha Bollinedi
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Ranjith Kumar Ellur
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Ashok Kumar Singh
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, India
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Mutluay AT, Mutluay M. Characterisation of the calcium silicate-based cement-composite interface and the bonding strength with total-etch or single/two-stage self-etch adhesive systems. AUST ENDOD J 2022; 48:501-509. [PMID: 34928537 DOI: 10.1111/aej.12600] [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] [Accepted: 12/06/2021] [Indexed: 12/14/2022]
Abstract
Due to favourable biological and physical properties, calcium silicate-based cements (CSCs) are biocompatible materials used widely for vital pulp therapies. Sealing efficacy between the adhesive system and CSC determines the clinical success of treatment. This study aimed to evaluate the shear bond strength (SBS) of CSC to composite resin with different adhesive systems and to analyse the CSC-composite interface. Mineral trioxide aggregate (MTA) (ProRoot MTA; Dentsply Tulsa Dental, Tulsa, OK), Biodentine (Septodont, Saint-Maur-des-Fossés, France) and NeoMTA Plus (Avalon Biomed Inc., Bradenton, FL) samples (n = 90) were placed in the cavities and divided into three subgroups according to the adhesive family (n = 10). SBSs were measured using a universal testing machine. The interfaces were examined using a scanning electron microscope (SEM) (×1000). NeoMTA Plus showed significantly higher SBS values than MTA and Biodentine (P < 0.0001). The application of total-etch adhesive system over Biodentine and NeoMTA Plus provided the statistically highest bond strength (P < 0.05). However, when the SBS values of MTA subgroups were compared, different adhesive families applied over MTA did not make a significant difference in SBS values (P > 0.05). Based on SEM analyses, the specimens exhibit no gaps, cracks or delamination within the adhesive layer, which indicates a good adhesion between the CSC-composite interface in all subgroups. In conclusion, the different adhesive families used over CSC did not influence interfacial gap formation.
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Affiliation(s)
- Abidin Talha Mutluay
- Vocational School of Health Services, Department of Dental Hygiene, Kirikkale University, Kirikkale, Turkey
| | - Merve Mutluay
- Vocational School of Health Services, Department of Dental Hygiene, Kirikkale University, Kirikkale, Turkey
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Mousivand S, Sheikhnezami M, Moradi S, Koohestanian N, Jafarzadeh H. Evaluation of the outcome of apexogenesis in traumatised anterior and carious posterior teeth using mineral trioxide aggregate: a 5-year retrospective study. AUST ENDOD J 2022; 48. [PMID: 34699673 DOI: 10.1111/aej.12583] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 09/02/2021] [Accepted: 09/26/2021] [Indexed: 12/14/2022]
Abstract
The purpose of this study was to evaluate the outcome of apexogenesis with mineral trioxide aggregate (MTA) in traumatised anterior and carious posterior teeth over 5 years. A comprehensive chart review was performed to obtain a retrospective of sequential previously completed cases with recalls. Clinical and radiographic data were collected for 97 vital immature teeth (40 traumatised anterior and 57 carious posterior teeth) pulpotomised (partial or full pulpotomy) using MTA with an average follow-up time of 5 years. Chi-squared test and Fisher's exact test were implemented to analyse data. The success rate in anterior teeth and posterior teeth was 82.5% and 96.4% respectively. Crown discolouration was observed in 25 (62.5%) anterior teeth. There was a significant difference between the number of successful and unsuccessful cases (P < 0.05) and there was no correlation between type of treatment and success/failure (P > 0.05). The success rate of apexogenesis using MTA in immature teeth was relatively high.
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Affiliation(s)
| | - Mahshid Sheikhnezami
- Dental Trauma Center, Academic Center for Education, Culture and Research, Mashhad, Iran
| | - Saeed Moradi
- Dental Material Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Hamid Jafarzadeh
- Dental Trauma Center, Academic Center for Education, Culture and Research, Mashhad, Iran.,Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
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El Gataa Z, Samir K, Tadesse W. Genetic Dissection of Drought Tolerance of Elite Bread Wheat ( Triticum aestivum L.) Genotypes Using Genome Wide Association Study in Morocco. Plants (Basel) 2022; 11:plants11202705. [PMID: 36297729 PMCID: PMC9611990 DOI: 10.3390/plants11202705] [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] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/01/2022] [Accepted: 10/03/2022] [Indexed: 06/01/2023]
Abstract
Drought is one of the most important yield-limiting factors in Morocco. Identification and deployment of drought-tolerant wheat varieties are important to cope with the challenge of terminal moisture stress and increase wheat productivity. A panel composed of 200 elite spring bread wheat genotypes was phenotyped for yield and agronomic traits for 2 years (2020 and 2021) in Morocco under rainfed and irrigated environments. The panel was genotyped using 20K SNPs and, after filtration, a total of 15,735 SNP markers were used for a genome-wide association study (GWAS) using a mixed linear model (MLM) to identify marker-trait associations (MTA) and putative genes associated with grain yield and yield-related traits under rainfed and irrigated conditions. Significant differences were observed among the elite genotypes for grain yield and yield-related traits. Grain yield performance ranged from 0.97 to 6.16 t/ha under rainfed conditions at Sidi Al-Aidi station and from 3.31 to 9.38 t/h under irrigated conditions at Sidi Al-Aidi station, while Grain yield at Merchouch station ranged from 2.32 to 6.16 t/h under rainfed condition. A total of 159 MTAs (p < 0.001) and 46 genes were discovered, with 67 MTAs recorded under rainfed conditions and 37 MTAs recorded under irrigated conditions at the Sidi Al-Aidi station, while 55 MTAs were recorded under rainfed conditions at Merchouch station. The marker ‘BobWhite_c2988_493’ on chromosome 2B was significantly correlated with grain yield under rainfed conditions. Under irrigated conditions, the marker ‘AX-94653560’ on chromosome 2D was significantly correlated with grain yield at Sidi Al-Aidi station. The maker ‘RAC875_c17918_321’ located on chromosome 4A, associated with grain yield was linked with the gene TraesCS4A02G322700, which encodes for F-box domain-containing protein. The markers and candidate genes discovered in this study should be further validated for their potential use in marker-assisted selection to generate high-yielding wheat genotypes with drought tolerance.
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Affiliation(s)
- Zakaria El Gataa
- The International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat 10080, Morocco
- Faculty of Sciences Ben M’sick, University Hassan II of Casablanca, Casablanca 7955, Morocco
| | - Karima Samir
- Faculty of Sciences Ben M’sick, University Hassan II of Casablanca, Casablanca 7955, Morocco
| | - Wuletaw Tadesse
- The International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat 10080, Morocco
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Park EH, Rhee SH, Choi HW, Shon WJ. Biocompatibility and osteogenic potential of mineral trioxide aggregate mixed with hydrophilic synthetic polymer: An in vitro and in vivo study. Dent Mater J 2022; 41:780-786. [PMID: 35768223 DOI: 10.4012/dmj.2022-036] [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: 12/31/2022]
Abstract
This study aimed to investigate in vitro biologic properties of mineral trioxide aggregate (MTA) mixed with 3% PVA (MTA-3% PVA) and in vivo dental pulp responses to direct capping in comparison with MTA mixed with distilled water (MTA-DW). Cell proliferation and osteogenic differentiation in culture of human dental pulp cells (hDPCs), and pH changes were evaluated. Pulps in 24 mandibular premolars of four 9-month-old beagle dogs were mechanically exposed and direct pulp capping was performed. Histological specimens were scored according to the degree of mineralization. MTA-3% PVA showed similar cell proliferation and similar or superior osteogenic differentiation of hDPCs compared with MTA-DW. All specimens were associated with calcified bridge formation and there were no significant differences in mineralization scores between the groups (p>0.05). The results suggested that MTA-3% PVA exhibited favorable biocompatibility and osteogenic differentiation in vitro compared with MTA-DW. Furthermore, both groups demonstrated similar results when used as pulp-capping agents in vivo.
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Affiliation(s)
- Eun Hyun Park
- Department of Conservative Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
| | - Sang-Hoon Rhee
- Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University
| | - Hae Won Choi
- Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University.,Department of Orthodontics, The Institute of Oral Health Science, Samsung Medical Center, Sungkyunkwan University, School of Medicine
| | - Won-Jun Shon
- Department of Conservative Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
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Clauder T. Present status and future directions - Managing perforations. Int Endod J 2022; 55 Suppl 4:872-891. [PMID: 35403711 DOI: 10.1111/iej.13748] [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: 12/28/2021] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 12/31/2022]
Abstract
Root perforations are severe complications and are associated with compromised endodontic treatment outcomes, especially when bacterial infection is allowed to establish. Perforations may occur due to pathological processes or treatment consequences. Various dental materials have been proposed over the years for perforation repair with varying degrees of success. The use of bioactive materials, such as mineral trioxide aggregate (MTA) and other calcium-silicate cements, promotes a favourable environment for regeneration and has been used successfully for perforation repair. This is in contrast to materials used previously that often led to unpredictable outcomes. With the increasing range of new bioactive endodontic materials available, the number of potential materials being used for repair of root perforations is growing. Though promising to date, there is little evidence to support the use of most of these new materials. The aim of this narrative review is to provide the background, clinical techniques and outcome of nonsurgical and surgical perforation repair.
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Smith CR, Aranda R, Christensen JG, Engstrom LD, Gunn RJ, Ivetac A, Ketcham JM, Kuehler J, David Lawson J, Marx MA, Olson P, Thomas NC, Wang X, Waters LM, Kulyk S. Design and evaluation of achiral, non-atropisomeric 4-(aminomethyl)phthalazin-1(2H)-one derivatives as novel PRMT5/ MTA inhibitors. Bioorg Med Chem 2022; 71:116947. [PMID: 35926325 DOI: 10.1016/j.bmc.2022.116947] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 02/04/2023]
Abstract
MRTX1719 is an inhibitor of the PRMT5/MTA complex and recently entered clinical trials for the treatment of MTAP-deleted cancers. MRTX1719 is a class 3 atropisomeric compound that requires a chiral synthesis or a chiral separation step in its preparation. Here, we report the SAR and medicinal chemistry design strategy, supported by structural insights from X-ray crystallography, to discover a class 1 atropisomeric compound from the same series that does not require a chiral synthesis or a chiral separation step in its preparation.
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Affiliation(s)
| | - Ruth Aranda
- Mirati Therapeutics, San Diego, CA 92121, United States
| | | | | | - Robin J Gunn
- Mirati Therapeutics, San Diego, CA 92121, United States
| | | | | | - Jon Kuehler
- Mirati Therapeutics, San Diego, CA 92121, United States
| | | | | | - Peter Olson
- Mirati Therapeutics, San Diego, CA 92121, United States
| | | | - Xiaolun Wang
- Mirati Therapeutics, San Diego, CA 92121, United States
| | | | - Svitlana Kulyk
- Mirati Therapeutics, San Diego, CA 92121, United States.
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