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Araújo BCL, de Melo Lima TRC, de Gois-Santos VT, Nascimento GKBO, Martins-Filho PR, de Magalhães Simões S. Comparative analysis of masseter muscle electrical activity by nasal patency in children with rhinitis and asthma: a pilot observational study. Eur Arch Otorhinolaryngol 2024; 281:2733-2738. [PMID: 38418553 DOI: 10.1007/s00405-024-08482-7] [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: 10/14/2023] [Accepted: 01/15/2024] [Indexed: 03/01/2024]
Abstract
PURPOSE This pilot cross-sectional study aimed to evaluate differences in electromyographic activity patterns of the masseter muscle according to the nasal patency in children with rhinitis and asthma. METHODS The study included 43 children aged 5-14 years with rhinitis and/or asthma. Patients underwent peak nasal inspiratory flow (PNIF) measurement to assess nasal patency, and electromyographic evaluation of the right and left masseter muscles during chewing and at rest. Electromyographic activity patterns according to nasal patency were compared using the Mann-Whitney test, and effect sizes were measured using the Glass rank biserial (rb) correlation. A p-value of < 0.05 was considered statistically significant. RESULTS No significant differences in electromyographic activity of the masseter muscle at rest, during unilateral chewing, or during habitual chewing were found between the groups. However, we found that patients with low nasal patency had a median electric activity of the right masseter muscle during maximum contraction of 60.53 (51.74-72.43), while those with adequate nasal patency had a median of 77.40 (56.71-88.45). Although the difference in myoelectric activity between the groups did not reach statistical significance (p = 0.061) at the adopted significance level of 5%, the size of the difference between groups were considered moderate (rb = 0.338) and a potential association between nasal patency and the muscular function of the masseter muscle could be suggested. CONCLUSION The study found no differences in the electromyographic activity of the masseter muscle at rest, during unilateral chewing, or during habitual chewing among children with rhinitis and asthma based on nasal patency. Further research with larger sample sizes is needed to validate these findings and gain a better understanding of the impact of nasal patency on the muscular function of the masseter muscle.
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Affiliation(s)
- Brenda Carla Lima Araújo
- Department of Speech Therapy, Pós-Graduação em Ciências da Saúde, Federal University of Sergipe-UFS, Rua Cláudio Batista, S/N. Bairro Sanatório, Aracaju, Sergipe, 49060-100, Brazil.
- Graduate Program in Health Sciences, Federal University of Sergipe, Aracaju, Sergipe, Brazil.
- Investigative Pathology Laboratory, Federal University of Sergipe, Aracaju, Sergipe, Brazil.
| | - Thales Rafael Correia de Melo Lima
- Graduate Program in Health Sciences, Federal University of Sergipe, Aracaju, Sergipe, Brazil
- Investigative Pathology Laboratory, Federal University of Sergipe, Aracaju, Sergipe, Brazil
| | - Vanessa Tavares de Gois-Santos
- Graduate Program in Health Sciences, Federal University of Sergipe, Aracaju, Sergipe, Brazil
- Investigative Pathology Laboratory, Federal University of Sergipe, Aracaju, Sergipe, Brazil
| | - Gerlane Karla Bezerra Oliveira Nascimento
- Department of Speech Therapy, Pós-Graduação em Ciências da Saúde, Federal University of Sergipe-UFS, Rua Cláudio Batista, S/N. Bairro Sanatório, Aracaju, Sergipe, 49060-100, Brazil
| | - Paulo Ricardo Martins-Filho
- Graduate Program in Health Sciences, Federal University of Sergipe, Aracaju, Sergipe, Brazil
- Investigative Pathology Laboratory, Federal University of Sergipe, Aracaju, Sergipe, Brazil
- Applied Health Sciences Program, Federal University of Sergipe, Lagarto, Brazil
| | - Silvia de Magalhães Simões
- Graduate Program in Health Sciences, Federal University of Sergipe, Aracaju, Sergipe, Brazil
- Department of Medicine, Federal University of Sergipe, Aracaju, Sergipe, Brazil
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Yurchenko M, Hubálková H, Charvát J. Selected muscle tone and asymmetry of the occlusal plane in case of intracapsular temporomandibular joint disorder. Cranio 2024; 42:267-278. [PMID: 34355675 DOI: 10.1080/08869634.2021.1964052] [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] [Indexed: 10/20/2022]
Abstract
Objective: To discover the extent of the connection between occlusal plane asymmetry and the rest tone of the four muscle groups of the orofacial region with temporomandibular joint pathology.Methods: Eighty-seven subjects were divided into two groups. The following methods were applied: clinical examination, roentgenological examination, and electromyography. Data were evaluated and statistically analyzed.Results: The variability of occlusal plane inclination in relation to the porion plane was 0-4.6º.The tonus of masseter muscle was higher in the experimental group: 1.45 mV more than in the control group: 1.23 mV (p < 0.05).Conclusion: Asymmetry of the occlusal plane inclination was found for nearly all subjects in both groups. It can be compensated for by adaptation mechanisms and does not cause temporomandibular joint disorders. Undertaken research shows the existence of a proven correlation between TMJ disorders and the resting tonus of the masseter muscle.
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Affiliation(s)
- Maksim Yurchenko
- Charles University in Prague, 1st Faculty of Medicine, Department Of Stomatology, Prague 2, Czech Republic
| | - Hana Hubálková
- Charles University in Prague, 1st Faculty of Medicine, Department Of Stomatology, Prague 2, Czech Republic
| | - Jindřich Charvát
- Charles University in Prague, 1st Faculty of Medicine, Department Of Stomatology, Prague 2, Czech Republic
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Grinberg N, Whitefield S, Kleinman S, Frenkel G, Peleg O. Botulinum Toxin-Induced Parotitis: A Postoperative Complication Following Masseter Muscle Injection. J Oral Maxillofac Surg 2024; 82:525-530. [PMID: 38438110 DOI: 10.1016/j.joms.2024.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 02/05/2024] [Accepted: 02/09/2024] [Indexed: 03/06/2024]
Abstract
Botulinum toxin (BTX) injection is a common treatment for bruxism, but there is no literature on potential salivary gland complications. This paper presents a case of acute parotitis in a 60-year-old female following BTX injections to the masseter muscle. This case highlights the possible salivary gland complications after injection of BTX into the masticatory muscles. An electronic search of PubMed and Embase databases was conducted to create a literature review in order to delve into the etiology behind the presented case and suggest potential preventive measures to avoid salivary gland complications. Thirty-one articles are reviewed and discussed. Currently, there is no consensus on the causes of the mentioned complication. However, various factors have been proposed, encompassing anatomical, physiological, biological, and physical aspects. Several methods have been recommended for the safe injection of BTX, which, along with better medical training and knowledge, are warranted to achieve predictable results.
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Affiliation(s)
- Nadav Grinberg
- Trainee, Department of Otolaryngology, Head and Neck Surgery and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel; Physician, "Bina" Program, Medical Corps (IDF) and Faculty of Dental Medicine, Hebrew University, Jerusalem, Israel.
| | - Sara Whitefield
- Attending Physician, Oral Medicine Unit, Head and Neck Surgery and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Shlomi Kleinman
- Head of Oral and Maxillofacial Surgery, Department of Otolaryngology, Head and Neck Surgery and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Gal Frenkel
- Attending Physician, Department of Otolaryngology, Head and Neck Surgery and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Oren Peleg
- Attending Physician, Department of Otolaryngology, Head and Neck Surgery and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel
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Kim JH, Kim BG, Im YG. Surface electromyography for evaluating patients with oromandibular dystonia. Cranio 2024; 42:316-324. [PMID: 34455921 DOI: 10.1080/08869634.2021.1971448] [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] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To investigate myoelectric signals of dystonic activities in oromandibular dystonia (OMD) subjects using surface electromyography (EMG). METHODS Twelve OMD subjects were included in this study. Resting myoelectric activities of the superficial masseter, anterior temporalis, and anterior belly of the digastric muscle on both sides were monitored, and dystonic muscle contractions were recorded using surface EMG. Myoelectric signal amplitude, the type of muscle contraction, and contraction rate for phasic activities were evaluated. RESULTS Surface EMG revealed that eight subjects had dystonic muscle activities in the phasic contraction pattern, three subjects had a tonic contraction pattern, and one subject had a mixed pattern. Synchronous contraction of dystonic muscles was frequently observed. Many of the monitored muscles showed high resting amplitudes. CONCLUSION Surface EMG detects abnormal muscle activities related to oromandibular dystonia. Surface EMG can serve as an objective method for diagnosing oromandibular dystonia.
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Affiliation(s)
- Jae-Hyung Kim
- Department of Oral Medicine, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Byung-Gook Kim
- Department of Oral Medicine, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Yeong-Gwan Im
- Department of Oral Medicine, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
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Abstract
OBJECTIVE To describe the role of body posture and skeletal class in the symmetrical activity of chewing muscles. METHODS Descriptive study with association. Skeletal class measured by the Steiner method. Postural analysis through APECS mobile application for forward head posture and shoulder discrepancy, and surface electromyography with Biopac® device. RESULTS The skeletal class, forward head posture, and shoulder discrepancy presented statistical association with the symmetrical electromyographic response of digastric muscles and masseter muscles during swallowing. DISCUSSION This study exhibited a positive relationship between digastric muscle symmetry and skeletal class during swallowing. The compensation of the hyoid system explains these results, showing that skeletal Class III has better electromyographic balance. In contrast, masseter muscle symmetry during swallowing presented a negative relationship with skeletal class. The stabilization role that this muscle plays during swallowing explains these findings, caused by the different lengths and direction of this muscle in skeletal Class III.
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Affiliation(s)
| | - Gabriela Peirano
- School of Dentistry, University of Valparaiso, Valparaiso, Chile
| | - Nancy Tapia
- School of Dentistry, University of Valparaiso, Valparaiso, Chile
| | - Patricia Venega
- School of Dentistry, University of Valparaiso, Valparaiso, Chile
| | - Norman Marfull
- Graduate School, Faculty of Dentistry, University of Valparaiso, Valparaiso, Chile
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Sadeghlo N, Selvanathan J, Koshkebaghi D, Cioffi I. Aberrant occlusal sensitivity in adults with increased somatosensory amplification: a case-control study. Clin Oral Investig 2024; 28:250. [PMID: 38613726 DOI: 10.1007/s00784-024-05628-z] [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: 02/24/2024] [Accepted: 03/20/2024] [Indexed: 04/15/2024]
Abstract
OBJECTIVES Occlusal sensitivity (OS)-the ability to detect fine objects between opposing teeth-mainly relies on the activity of mechanoreceptors located in the periodontal ligament. We tested whether somatosensory amplification (SSA)-the tendency to perceive normal somatic sensations as being intense, noxious, and disturbing, which plays a critical role in hypervigilance-affects OS. MATERIALS AND METHODS We measured OS in 66 adults divided into three groups based on their SSA scores (LowSSA, Intermediate - IntSSA, HighSSA) by asking them to bite on aluminum foils (8 to 72 μm thick) and a sham foil, and report whether they felt each foil. We performed 20 trials for each thickness and sham condition (each participant was tested 120 times), and compared the frequency of correct answers (%correct) among groups after adjusting for participants' trait anxiety, depression, self-reported oral behaviors, and masseter cross-sectional area. RESULTS %correct was affected by the interaction Foil Thickness-by-SSA (p = 0.007). When tested with the 8 μm foil, the HighSSA group had a lower %correct than the IntSSA (contrast estimate [95% CI]: -14.2 [-25.8 - -2.6]; p = 0.012) and the LowSSA groups (-19.1 [-31.5 - -6.6]; p = 0.001). Similarly, with the 24 μm foil, the HighSSA group had a lower %correct compared to the IntSSA (-12.4 [-24.8-0.1]; p = 0.048) and the LowSSA groups (-10.8 [-22.5-0.8]; p = 0.073). CONCLUSION Individuals with high SSA present with an aberrant occlusal sensitivity. CLINICAL RELEVANCE Our findings provide novel insights into the relationship between occlusal perception and psychological factors, which may influence an individual's ability to adapt to dental work.
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Affiliation(s)
- Negin Sadeghlo
- Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, 124 Edward Street, Toronto, ON, M5G 1X3, Canada
| | - Janannii Selvanathan
- Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, 124 Edward Street, Toronto, ON, M5G 1X3, Canada
| | - Dursa Koshkebaghi
- Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, 124 Edward Street, Toronto, ON, M5G 1X3, Canada
| | - Iacopo Cioffi
- Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, 124 Edward Street, Toronto, ON, M5G 1X3, Canada.
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Károlyházy K, Vass AF, Csillik A, Schmidt P, Márton K. Is temporomandibular joint involvement more frequent in patients with epilepsy? A clinical study. J Prosthet Dent 2024; 131:626-632. [PMID: 35725662 DOI: 10.1016/j.prosdent.2022.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 03/20/2022] [Accepted: 03/21/2022] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM Epileptic seizures may affect the stomatognathic system via transmission of an increased load to the dentition and the temporomandibular joint (TMJ), resulting in temporomandibular joint dysfunction (TMD). PURPOSE The purpose of this clinical study was to assess whether TMD was more prevalent in patients with epilepsy than in those without epilepsy. MATERIAL AND METHODS A total of 107 participants diagnosed with epilepsy and 100 healthy controls were enrolled in the study. Those with epilepsy were divided according to their dental manageability into 3 subgroups: mild group, moderate group, and severe group. Following general, dental, and TMJ-related history, the range of maximal mouth opening (MMO), laterotrusion, possible deviation and deflection, and presence of crepitation and clicking was recorded, as suggested by the diagnostic criteria for temporomandibular diseases (DC/TMD). Pressure pain threshold (PPT) was also measured by using a pressure algometer on 3 points bilaterally. RESULTS Incidence of TMJ complaints was not significantly different between the control (30%) and the group diagnosed with epilepsy (33%); however, the number of complaints experienced was significantly higher in the epilepsy group (C: 3%, E: 16% had 3 or more complaints; P<.001). Joint clicking was significantly more prevalent in the entire epilepsy group (P=.012) and in the mild group (P=.004) than in controls. Crepitation and joint pain were not significantly more common in the epilepsy group. Maximal mouth opening, laterotrusion, and the ratio of restricted mouth opening did not differ significantly in the epilepsy group. Deflection occurred significantly more often in the epilepsy subgroups (mild and moderate groups; P<.001), and the extent of deflection was also significantly higher in all the epilepsy subgroups (P<.001) than in controls. Regarding the pressure pain threshold, significant difference was observed in the severe group at the left masseter muscle points M1 (P=.046) and M2 (P=.028) compared with controls. CONCLUSIONS All parameters typical of TMD could be found frequently in patients with epilepsy. Because of the seizures and the consequent joint overload, the TMJ involvement was more common or more serious in those diagnosed with epilepsy. Outcomes of this study support the assumption that epilepsy is a risk factor for the development of TMD.
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Affiliation(s)
- Katalin Károlyházy
- Associate Professor, Department of Prosthetic Dentistry, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Andrea Fanni Vass
- Assistant Professor, Department of General Dental Preclinical Practice, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.
| | - Anita Csillik
- Assistant Lecturer, Department of Neurology, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Schmidt
- Vice-Director, Department of Prosthetic Dentistry, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Krisztina Márton
- Associate Professor and Head of Department, Department of General Dental Preclinical Practice, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
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Bayram F, Çelik ZM, Berkel G, Aktaç Ş, Güneş FE. Anthropometric and laboratory parameter alterations following bimaxillary orthognathic surgery. Br J Oral Maxillofac Surg 2024; 62:278-283. [PMID: 38336577 DOI: 10.1016/j.bjoms.2023.12.014] [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: 07/25/2023] [Revised: 10/31/2023] [Accepted: 12/26/2023] [Indexed: 02/12/2024]
Abstract
The aim of this study was to investigate the impact of bimaxillary orthognathic surgery on patients' anthropometric measures and laboratory parameters. This study was conducted on patients who underwent bimaxillary orthognathic surgery. Anthropometric measurements were collected before surgery (T0) and at intervals of one week (T1), two weeks (T2), one month (T3), and three months (T4) postoperatively, and laboratory parameters at T0 and T4. Data analysis included repeated-measures ANOVA for assessing weight changes, body mass index (BMI) and fat percentage changes, the Friedman test for muscle mass changes, and independent t tests to understand gender-based differences. Significant reductions were observed in weight (mean differences ranging from 2.26 kg to 3.84 kg, 95.00% CI: 1.29 to 4.62, p < 0.01) and BMI (mean differences ranging from 0.76 to 1.32, 95.00% CI: 0.38 to 1.58, p < 0.01) postoperatively at all follow-up points. Fat percentage changes were significant between T0 - T3 (MD = 1.17, 95.00% CI: 0.26 to 2.08, p < 0.05) and T0 - T4 (MD = 1.28, 95.00% CI: 0.14 to 2.43, p < 0.05). Changes in muscle mass were significant until T3 (MD ranging from 71.00 to 107.0, p < 0.01). Also, haemoglobin levels were significantly higher at T0 than T4 (MD = 0.35, 95% CI: 0 to 0.7). These changes showed no significant gender-based differences (p > 0.05). Our study showed that orthognathic surgery prompts temporary changes in body weight, Body Mass Index, and haemoglobin levels. Future research should explore interventions to mitigate these changes and enhance postoperative recovery.
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Affiliation(s)
- Ferit Bayram
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Marmara, Istanbul, Türkiye.
| | - Zehra Margot Çelik
- Department of Nutrition and Dietetics, Faculty of Health Sciences, University of Marmara, Istanbul, Türkiye
| | - Gülcan Berkel
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Marmara, Istanbul, Türkiye
| | - Şule Aktaç
- Department of Nutrition and Dietetics, Faculty of Health Sciences, University of Marmara, Istanbul, Türkiye
| | - Fatma Esra Güneş
- Department of Nutrition and Dietetics, Faculty of Health Sciences, University of Istanbul Medeniyet, Istanbul, Turkey
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Bahia MM, Lowell SY. Surface Electromyographic Activity of the Masseter Muscle During Regular and Effortful Saliva Swallows: A Preliminary Study. Dysphagia 2024; 39:231-240. [PMID: 37477753 DOI: 10.1007/s00455-023-10605-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 07/06/2023] [Indexed: 07/22/2023]
Abstract
Biofeedback is a critical component in motor learning of new, complex behaviors such as modifications to swallowing. Surface electromyography (sEMG) is a commonly employed biofeedback tool in swallowing management to assess muscle activity patterns, determine amplitude and duration of swallowing, and train swallowing strategies such as the effortful swallow (EFS) maneuver. The EFS can potentially change multiple physiological components of the swallowing process such as pressure generation and movement of biomechanical structures. The purposes of this study were to determine whether the masseter muscle could differentiate a normal swallow (NS) from an EFS and whether there was a relationship between perceived muscle effort used to swallow and objective measures of muscle activity. Twenty healthy young adults participated in this study. Masseter sEMG peak amplitude and duration were measured across five regular saliva swallows and five effortful saliva swallows. Additionally, participants rated their perceived swallowing effort using a visual analog scale (VAS). Two swallowing conditions, NSs and EFSs were compared with hierarchical models, and repeated measures correlation was used to determine the relationships between the VAS and sEMG peak amplitude. Participants produced swallows with greater masseter sEMG peak amplitude and duration during the EFS. Moreover, a positive correlation was identified between perceived swallowing effort and masseter sEMG peak amplitude. These findings support the potential use of the masseter muscle to differentiate NSs from EFSs and implement the VAS during therapy for tracking patients' performance, particularly in settings with limited access to sEMG.
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Affiliation(s)
- Mariana M Bahia
- Department of Communication Sciences and Disorders, Syracuse University, Syracuse, NY, USA.
- Think & Speak Lab, Shirley Ryan AbilityLab, Chicago, IL, USA.
- Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - Soren Y Lowell
- Department of Communication Sciences and Disorders, Syracuse University, Syracuse, NY, USA
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Taş S, Kaynak BA, Salkin Y, Karakoç ZB, Dağ F. An investigation of the changes in mechanical properties of the orofacial and neck muscles between patients with myogenous and mixed temporomandibular disorders. Cranio 2024; 42:150-159. [PMID: 34061722 DOI: 10.1080/08869634.2021.1934795] [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: 01/16/2023]
Abstract
OBJECTIVE To investigate the possible changes in the mechanical properties of the orofacial and neck muscles in patients with temporomandibular disorders (TMD). METHODS The study included a total of 98 females. Females were divided into three groups as myogenous TMD, mixed TMD, and healthy controls. The frequency (indicator of muscle tone), stiffness, and decrement (related to muscle elasticity) values of the sternocleidomastoid, upper trapezius, cervical extensor, and masseter muscles were measured using a portable myotonometer. RESULTS The frequency, stiffness, and decrement values of the masseter muscle were higher in the mixed and myogenous TMD groups than those of the control group (p < 0.017). The mixed TMD group had higher frequency and stiffness values in the upper trapezius muscle compared with the control group (p < 0.017). DISCUSSION The results suggest that the mechanical properties of the oral and neck muscles may be affected in patients with TMD.
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Affiliation(s)
- Serkan Taş
- School of Health Science, Alanya Alaaddin Keykubat University, Department of Physical Therapy and Rehabilitation, Antalya, Turkey
| | - Besime Ahu Kaynak
- Department of Physiotherapy and Rehabilitation, Toros University, School of Health Sciences, Mersin, Turkey
| | - Yasemin Salkin
- Vocational School of Medical Services, Department of Health Care Services, Mersin University, Mersin, Turkey
| | - Zehra Betül Karakoç
- Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, Marmara University, Istanbul, Turkey
| | - Figen Dağ
- School of Medicine, Department of Physical Medicine and Rehabilitation, Mersin University, Mersin, Turkey
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Ita R, Magara J, Ochiai Y, Tsujimura T, Inoue M. Use of suction electrodes for measurement of intrinsic tongue muscular endurance during lingual pressure generation. J Oral Rehabil 2024; 51:566-573. [PMID: 37902163 DOI: 10.1111/joor.13612] [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: 11/30/2022] [Revised: 05/02/2023] [Accepted: 10/17/2023] [Indexed: 10/31/2023]
Abstract
BACKGROUND Lingual pressure (LP) generation is cooperatively controlled not only by the intrinsic tongue (I-ton) muscles but also by hyoid muscle activation. However, the measurement of endurance and fatigue properties of I-ton muscles is difficult due to the instability of electrodes. OBJECTIVE The purpose of this study was to apply suction electrodes to measure electromyograms (EMGs) of I-ton muscle and to evaluate integrated EMG amplitude (iEMG) and mean power frequency (MPF) of EMG in the I-ton and hyoid muscles performing continuous LP. METHODS Twenty healthy adult volunteers (10 males, 10 females, mean age 28.8 years) were instructed to perform 10-s LP generation tasks at 25%, 50%, 75% and 100% of maximum LP in randomised order with visual feedback. During each task, EMGs of the I-ton, suprahyoid (S-hyo), infrahyoid (I-hyo) and masseter (Mass) muscles were simultaneously recorded. The iEMG and MPF of EMG burst during 10-s LP tasks were compared. The recording period was divided into three substages to analyse temporal changes with the Friedman test. RESULTS During the 10-s task, the iEMG significantly increased as the LP strength increased (p < .001). There was no time-dependent change in the I-ton iEMG; however, the MPF of the I-ton EMG burst decreased in all tasks (p < .05). The S-hyo and I-hyo iEMGs gradually increased, especially with strong LP (p < .01). CONCLUSION While I-ton muscles may easily fatigue during 10-s LP generation, S-hyo and I-hyo muscles may help compensate for the weakened I-ton muscle activity by increasing their activity to maintain LP.
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Affiliation(s)
- Reiko Ita
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Jin Magara
- Unit of Dysphagia Rehabilitation, Niigata University Medical & Dental Hospital, Niigata, Japan
| | - Yuto Ochiai
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Takanori Tsujimura
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Makoto Inoue
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
- Unit of Dysphagia Rehabilitation, Niigata University Medical & Dental Hospital, Niigata, Japan
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Guo Y, Wen L, Wang X, Zou H, Liang W, Wang J, Zhu X. Analysis of Age-Related Changes in Lower Facial Fat Compartments and of the Course of Blood Vessels Using Computed Tomography. Plast Reconstr Surg 2024; 153:539e-548e. [PMID: 37010462 DOI: 10.1097/prs.0000000000010506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
BACKGROUND According to the volume restoration theory, lower facial fat compartments tend to selectively atrophy or hypertrophy with age. The aim of this study was to demonstrate age-related changes in lower facial fat compartments using computed tomography, with strict control of the body mass index and underlying diseases. METHODS This study included 60 adult women in three age-based categories. The thicknesses of the jowl, labiomandibular, and chin fat compartments were measured using computed tomographic images. The distribution and arrangement of facial blood vessels were further analyzed to provide evidence of the safety of rejuvenation strategies based on the facial volumetric theory. RESULTS The inferior part of the superficial jowl fat compartment and deep jowl fat compartment thickened with age. The deep layer of the labiomandibular fat compartment thinned with age, and the superficial layer thickened with age. The deep and superficial layers of the chin compartments thickened with age. The facial vein passes through the lower mandibular border at the anterior edge of the masseter muscle and moves upward, perpendicular to the lower mandibular border. The high-risk area of the facial artery had an angle of approximately 45 degrees to the lower mandibular border. CONCLUSIONS This study suggests that with age, selective thickening or thinning occurs in different lower facial fat compartments. The mandible and masseter muscle were used as reference markers to analyze the courses of the facial artery and facial vein, which can help clinicians to reduce vascular injury.
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Affiliation(s)
- Yixuan Guo
- From the Department of Plastic and Cosmetic Surgery, First People's Hospital of Foshan
- Departments of Plastic Surgery
| | - Lihong Wen
- Department of Plastic Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University
| | - Xianlong Wang
- Radiology, Second School of Clinical Medicine, Southern Medical University
| | - Huan Zou
- Radiology, Second School of Clinical Medicine, Southern Medical University
| | - Weiqiang Liang
- Department of Plastic Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University
| | | | - Xiongxiang Zhu
- Department of Plastic and Burn Surgery, Third School of Clinical Medicine, Southern Medical University
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Li S, Mei L, Chen Q, Gao K, Zheng W, Li Y. Unilateral injection of botulinum toxin type A into the masseter muscle induces mandibular asymmetry in adolescent rats by suppressing the angular process growth. Am J Orthod Dentofacial Orthop 2024; 165:232-244. [PMID: 37897486 DOI: 10.1016/j.ajodo.2023.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 10/30/2023]
Abstract
INTRODUCTION Mandibular asymmetry has negative impacts on maxillofacial aesthetics and psychological well-being. This study investigated the effects of unilateral injection of botulinum toxin type A (BTX-A) into the masseter muscle on mandibular symmetry. METHODS Forty Wistar rats (4-week-old) were divided into 4 groups (n = 10): control, group 1 (1U BTX-A), group 2 (3U BTX-A), and group 3 (1U BTX-A for 3 times). BTX-A was injected into the right masseter of treatment groups. Cone-beam computerized tomography scans were taken before the injection and then at 2 weeks, 4 weeks, and 6 weeks after injection. Histologic and immunohistochemical staining were done for the condylar cartilage. RNA sequencing and quantitative reverse transcription polymerase chain reaction were used to detect gene expression in the angular process. RESULTS In Groups 2 and 3, the right angular process length and the ramus height were reduced 4 weeks after injection, resulting in the mandibular midline deviating to the right side; the right condylar cartilage had reduced thickness and decreased expression of RUNX2, SOX9, and COL II (P <0.05). Two hundred sixty-one genes were differentially expressed (256 downregulated) in the angular process at 3 days post-BTX-A injection, and the calcium signaling pathway was unveiled through the Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis. Furthermore, TRPC1, Wnt5a, CaMKII, Ctnnb1, and RUNX2 expression were significantly downregulated at 1 and 3 days postinjection. CONCLUSIONS Unilateral injection of BTX-A into the masseter muscle in adolescent rats induces mandibular asymmetry by suppressing the angular process growth on the injected side.
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Affiliation(s)
- Shijia Li
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Li Mei
- Discipline of Orthodontics, Department of Oral Sciences, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Qiuyu Chen
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Kui Gao
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Endodontics and Operative Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wei Zheng
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Yu Li
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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Botelho AL, da Silva AMBR, da Silva MAMR, Cândido Dos Reis A. Assessment of neuromuscular fatigue through frequency analysis of the electromyographic signal of control participants and those with temporomandibular dysfunction treated with resilient or hard occlusal devices. J Prosthet Dent 2024; 131:233-240. [PMID: 35400505 DOI: 10.1016/j.prosdent.2021.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 12/12/2021] [Accepted: 12/13/2021] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM Muscle hyperactivity that leads to neuromuscular fatigue can be evaluated by electromyography. Whether treatment with occlusal devices can restore neuromuscular balance to patients with temporomandibular disorders (TMDs) is unclear. PURPOSE The purpose of this clinical study was to evaluate neuromuscular fatigue by analyzing the frequency of the electromyographic signal of the masseter and anterior temporalis muscles on both sides in healthy participants and those with TMD treated with a resilient or hard occlusal device. MATERIAL AND METHODS One hundred asymptomatic participants and 30 with TMD were divided into 2 groups: treated with a hard device or treated with a resilient device. All underwent electromyographic examination before and after treatment with the occlusal devices. RESULTS In both groups, the results showed statistically significant differences (P<.01) when the fatigue rate before and after treatment with an occlusal device was compared. CONCLUSIONS Treatment with both types of occlusal device was efficient in reducing the rate of neuromuscular fatigue in patients with TMDs.
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Affiliation(s)
- André Luís Botelho
- Post-Doc student, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil.
| | | | | | - Andréa Cândido Dos Reis
- Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
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15
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Moussa MS, Bachour D, Komarova SV. Adverse effect of botulinum toxin-A injections on mandibular bone: A systematic review and meta-analysis. J Oral Rehabil 2024; 51:404-415. [PMID: 37668276 DOI: 10.1111/joor.13590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/15/2023] [Accepted: 08/21/2023] [Indexed: 09/06/2023]
Abstract
INTRODUCTION Botulinum toxin-A (BTX) is a potent neurotoxin that is emerging in the scope of dental practice for its ability to temporarily paralyse musculature and reduce hyperfunction. This may be desirable in diseases/disorders associated with hyperactive muscles such as the muscles of mastication, most implicated in painful temporomandibular disorders (TMDs). The use of BTX extends beyond its indications with off-label use in TMD's and other conditions, while potential adverse effects remain understudied. BTX is well-established hindlimb paralysis model in animals leading to significant bone loss with underlying mechanisms remaining unclear. The objective of this study is to systematically review the literature for articles investigating changes in mandibular bone following BTX injections and meta-analyse available data on reported bone outcomes. METHODS Comprehensive search of Medline, Embase and Web of Science retrieved 934 articles. Following the screening process, 36 articles in animals and humans were included for quantitative synthesis. Articles in human individuals (6) and three different animal species (14) presented mandibular bone outcomes that were included in the meta-analysis. RESULTS The masseter and temporalis muscles were frequently injected across all species. In humans, we observe a decrease of about 6% in cortical thickness of mandibular regions following BTX injection with no evident changes in either volume or density of bone structures. In animals, bone loss in the condylar region is significantly high in both cortical and trabecular compartments. DISCUSSION Our analysis supports the concept of BTX-induced bone-loss model in animal mandibles. Further, bone loss might be confined to the cortical compartments in humans. Most studies did not address the reality of repeated injections and excessive dosing, which occur due to the reversible action of BTX. More rigorous trials are needed to draw a full picture of potential long-term adverse effects on bone.
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Affiliation(s)
- Mahmoud S Moussa
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, Quebec, Canada
- Shriners Hospital for Children - Canada, Montreal, Quebec, Canada
| | - Dona Bachour
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, Quebec, Canada
| | - Svetlana V Komarova
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, Quebec, Canada
- Shriners Hospital for Children - Canada, Montreal, Quebec, Canada
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Lee JY, Seo KH. Can previously injected botulinum toxin cause paradoxical masseter muscle rigidity after administration of a nondepolarizing neuromuscular blocking agent? Can J Anaesth 2024; 71:294-295. [PMID: 37853281 DOI: 10.1007/s12630-023-02629-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/20/2023] Open
Affiliation(s)
- Ji Yung Lee
- Department of Anesthesiology and Pain Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Kwon Hui Seo
- Department of Anesthesiology and Pain Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.
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17
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Somay E, Topkan E, Pehlivan UA, Yilmaz B, Besen AA, Mertsoylu H, Pehlivan B, Selek U. The Use of Pre-Chemoradiotherapy Total Masseter Muscle Volume as a Novel Predictor of Radiation-Induced Trismus in Locally Advanced Nasopharyngeal Carcinoma Patients. Tomography 2024; 10:79-89. [PMID: 38250953 PMCID: PMC10819403 DOI: 10.3390/tomography10010007] [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: 11/01/2023] [Revised: 12/28/2023] [Accepted: 01/04/2024] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND We sought to determine whether pretreatment total masseter muscle volume (TMMV) measures can predict radiation-induced trismus (RIT) in patients with locally advanced nasopharyngeal carcinoma (LA-NPC) receiving concurrent chemoradiotherapy (C-CRT). METHODS We retrospectively reviewed the medical records of LA-NPC patients who received C-CRT and had pretreatment maximum mouth openings (MMO) greater than 35 mm. MMO of 35 mm or less after C-CRT were considered RIT. We employed receiver operating characteristic (ROC) curve analysis to explore the correlation between pre-treatment TMMV readings and RIT status. RESULTS Out of the 112 eligible patients, 22.0% of them received a diagnosis of RIT after C-CRT. The optimal TMMV cutoff that was significantly linked to post-C-CRT RIT rates was determined to be 35.0 cc [area under the curve: 79.5%; sensitivity: 75.0%; and specificity: 78.6%; Youden index: 0.536] in the ROC curve analysis. The incidence of RIT was significantly higher in patients with TMMV ≤ 5.0 cc than in those with TMMV > 35.0 cc [51.2% vs. 8.7%; Odds ratio: 6.79; p < 0.001]. A multivariate logistic regression analysis revealed that pre-C-CRT MMO ≤ 41.6 mm (p = 0.001), mean masticatory apparatus dose V56.5 ≥ 34% group (p = 0.002), and TMMV ≤ 35 cc were the independent predictors of significantly elevated rates of RIT. CONCLUSION The presence of a smaller pretreatment TMMV is a reliable and independent novel biological marker that can confidently predict higher RIT rates in LA-NPC patients who receive C-CRT.
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Affiliation(s)
- Efsun Somay
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Baskent University, Ankara 06490, Turkey;
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Kyrenia, Kyrenia 9265, Cyprus
| | - Erkan Topkan
- Department of Radiation Oncology, Faculty of Medicine, Baskent University, Adana 01120, Turkey
| | - Umur Anil Pehlivan
- Department of Radiology, Faculty of Medicine, Baskent University, Adana 01120, Turkey;
| | - Busra Yilmaz
- Department of Oral and Maxillofacial Radiology, School of Dental Medicine, Bahcesehir University, Istanbul 34353, Turkey;
| | - Ali Ayberk Besen
- Clinics of Medical Oncology, Adana Seyhan Medical Park Hospital, Adana 01120, Turkey;
| | - Huseyin Mertsoylu
- Clinics of Medical Oncology, Istinye University, Adana Medical Park Hospital, Adana 01120, Turkey;
| | - Berrin Pehlivan
- Department of Radiation Oncology, School of Medicine, Bahcesehir University, Istanbul 34450, Turkey;
| | - Ugur Selek
- Department of Radiation Oncology, School of Medicine, Koc University, Istanbul 34450, Turkey;
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18
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Buchbender M, Keplinger L, Kesting MR, Adler W, Schmitt CM. A clinical trial: Aqualizer ™ therapy and its effects on myopathies or temporomandibular dysfunctions. Part I: Objective parameters. Cranio 2024; 42:1-9. [PMID: 33590803 DOI: 10.1080/08869634.2021.1885886] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Symptoms of temporomandibular dysfunction (TMD) may include pain in the muscles or restrictions opening the mouth. The aim of this study was to assess the effects of initial Aqualizer™ therapy. METHODS Group 1 received initial Aqualizer™ therapy before definitive hard splint; Group 2 received no initial therapy. Patients with arthrosis, partial/total prosthesis or undergoing splint therapy were excluded. Objective (temporomandibular joint palpation, temporomandibular joint auscultation, palpation of the chewing muscles, and mobility of the lower jaw) parameters were evaluated. The level of statistical significance was 5% (p < 0.05). RESULTS In 53 patients (Group 1 n = 25; Group 2 n = 28), a significant improvement (p < 0.001) was found in Group 1 in pain on palpation (masseter muscle, temporal muscle, post-mandibular region, lateral pterygoid muscle, and suboccipital region), but no significant differences in jaw mobility were found. CONCLUSION Aqualizer™ therapy produces significant improvement of primary symptoms.
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Affiliation(s)
- Mayte Buchbender
- Department of Oral and Maxillofacial Surgery, University of Erlangen- Nuremberg, Erlangen, Germany
| | - Lukas Keplinger
- Department of Oral and Maxillofacial Surgery, University of Erlangen- Nuremberg, Erlangen, Germany
| | - Marco R Kesting
- Head of the Department of Oral and Maxillofacial Surgery, University of Erlangen- Nuremberg, Germany
| | - Werner Adler
- Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nuremberg, Erlangen, Germany
| | - Christian M Schmitt
- Department of Oral and Maxillofacial Surgery, University of Erlangen- Nuremberg, Erlangen, Germany
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Conti PCR, Cunha CO, Conti ACDCF, Bonjardim LR, Barbosa JS, Costa YM. Secondary bruxism: A valid diagnosis or just a coincidental finding of additional masticatory muscle activity? A narrative review of literature. J Oral Rehabil 2024; 51:74-86. [PMID: 37688286 DOI: 10.1111/joor.13592] [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: 10/07/2022] [Revised: 08/08/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023]
Abstract
INTRODUCTION Bruxism is defined as a repetitive masticatory muscle activity that can manifest it upon awakening (awake bruxism-AB) or during sleep (sleep bruxism-SB). Some forms of both, AB and SB can be associated to many other coexistent factors, considered of risk for the initiation and maintenance of the bruxism. Although controversial, the term 'secondary bruxism' has frequently been used to label these cases. The absence of an adequate definition of bruxism, the non-distinction between the circadian manifestations and the report of many different measurement techniques, however, are important factors to be considered when judging the literature findings. The use (and abuse) of drugs, caffeine, nicotine, alcohol and psychoactive substances, the presence of respiratory disorders during sleep, gastroesophageal reflux disorders and movement, neurological and psychiatric disorders are among these factors. The scarcity of controlled studies and the complexity and interactions among all aforementioned factors, unfortunately, does not allow to establish any causality or temporal association with SB and AB. The supposition that variables are related depends on different parameters, not clearly demonstrated in the available studies. OBJECTIVES This narrative review aims at providing oral health care professionals with an update on the co-risk factors and disorders possibly associated with bruxism. In addition, the authors discuss the appropriateness of the term 'secondary bruxism' as a valid diagnostic category based on the available evidence. CONCLUSION The absence of an adequate definition of bruxism, the non-distinction between the circadian manifestations and the report of many different measurement techniques found in many studies preclude any solid and convincing conclusion on the existence of the 'secondary' bruxism.
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Affiliation(s)
- Paulo Cesar R Conti
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
- Bauru Orofacial Group, University of São Paulo, Bauru, Brazil
| | - Carolina Ortigosa Cunha
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
- Bauru Orofacial Group, University of São Paulo, Bauru, Brazil
| | - Ana Cláudia de Castro F Conti
- Bauru Orofacial Group, University of São Paulo, Bauru, Brazil
- Department of Orthodontics and Pediatric Dentistry, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Leonardo R Bonjardim
- Bauru Orofacial Group, University of São Paulo, Bauru, Brazil
- Department of Biologic Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | | | - Yuri Martins Costa
- Bauru Orofacial Group, University of São Paulo, Bauru, Brazil
- Department of Biosciences, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
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20
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Kehrer A, Engelmann S, Knoedler L, Klein SM, Anker AM, Heidekrueger P, Tamm E, Bleys RL, Prantl L, Ruewe M. The masseteric nerve for facial reanimation: Macroscopic and histomorphometric characteristics in 106 human cadavers and comparison of axonal ratio with recipient nerves. J Craniomaxillofac Surg 2024; 52:8-13. [PMID: 38129186 DOI: 10.1016/j.jcms.2023.09.001] [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: 12/05/2022] [Accepted: 09/05/2023] [Indexed: 12/23/2023] Open
Abstract
Peripheral facial palsy causes severe impairments. Sufficient axonal load is critical for adequate functional outcomes in reanimation procedures. The aim of our study was to attain a better understanding of the anatomy of the masseteric nerve as a donor, in order to optimize neurotization procedures. Biopsies were obtained from 106 hemifaces of fresh frozen human cadavers. Histological cross-sections were fixed, stained with PPD, and digitized. Histomorphometry and a validated software-based axon quantification were conducted. Of the 154 evaluated branches, 74 specimens were of the main trunk (MT), 40 of the anterior branch (AB), and 38 of the descending branch (DB), while two halves of one cadaver featured an additional branch. The MT showed a diameter of 1.4 ± 0.41 mm (n = 74) with 2213 ± 957 axons (n = 55). The AB diameter was 0.9 ± 0.33 mm (n = 40) with 725 ± 714 axons (n = 30). The DB diameter was 1.15 ± 0.34 mm (n = 380) with 1562 ± 926 axons (n = 30). The DB demonstrated a high axonal capacity - valuable for nerve transfers or muscle transplants. Our findings should facilitate a balanced selection of axonal load, and are potentially helpful in achieving more predictable results while preserving masseter muscle function.
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Affiliation(s)
- Andreas Kehrer
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany.
| | - Simon Engelmann
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Leonard Knoedler
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Silvan M Klein
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Alexandra M Anker
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Paul Heidekrueger
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Ernst Tamm
- Department of Human Anatomy and Embryology, University of Regensburg, Regensburg, Germany
| | - Ronald Law Bleys
- Department of Anatomy, University Medical Center (UMC) Utrecht, Utrecht, Netherlands
| | - Lukas Prantl
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Marc Ruewe
- Department of Plastic, Hand, and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
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Cheng X, Huang Y, Li Y, Li J, Wang Y. Freezing Injury in Mouse Masseter Muscle to Establish an Orofacial Muscle Fibrosis Model. J Vis Exp 2023. [PMID: 38224092 DOI: 10.3791/65847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024] Open
Abstract
Orofacial muscle constitutes a subset of skeletal muscle tissue, with a distinct evolutionary trajectory and development origin. Unlike the somite-derived limb muscles, the orofacial muscles originate from the branchial arches, with exclusive contributions from the cranial neural crest. A recent study has revealed that regeneration is also different in the orofacial muscle group. However, the underlying regulatory mechanism remains to be uncovered. Current skeletal muscle regeneration models mainly focus on the limb and trunk muscle. In this protocol, dry ice was used to induce freezing injury in the mouse masseter muscle and tibialis anterior muscle to create an orofacial muscle fibrosis model. The temporal dynamics of muscle satellite cells and fibro-adipogenic progenitors were different between the two muscles, leading to impaired myofiber regeneration and excessive extracellular matrix deposition. With the help of this model, a deeper investigation into muscle regeneration in the orofacial area could be carried out to develop therapeutic approaches for patients with orofacial diseases.
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Affiliation(s)
- Xu Cheng
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University
| | - Yixuan Huang
- Department of Oral and Maxillofacial Surgery, West China School of Stomatology, Sichuan University
| | - Yanan Li
- Department of Oral and Maxillofacial Surgery, West China School of Stomatology, Sichuan University
| | - Jingtao Li
- Department of Oral and Maxillofacial Surgery, West China School of Stomatology, Sichuan University;
| | - Yan Wang
- Department of Oral and Maxillofacial Surgery, West China School of Stomatology, Sichuan University;
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Tada T, Murao H, Shiratani R, Park J, Hideshima M, Kanki H, Ishikawa N, Shibahara T, Fujimoto J, Higa S. Spontaneous resolution of inflammatory myopathy involving the masseter muscle following COVID-19 mRNA vaccination. Mod Rheumatol Case Rep 2023; 8:77-82. [PMID: 37178168 DOI: 10.1093/mrcr/rxad022] [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: 02/10/2023] [Revised: 03/28/2023] [Accepted: 04/14/2023] [Indexed: 05/15/2023]
Abstract
According to previous reports, most cases of inflammatory myopathy following messenger RNA (mRNA) vaccination can be classified as idiopathic inflammatory myopathy, particularly dermatomyositis, owing to their similar clinical features and courses. However, some patients have different clinical features and courses. We report a rare case of transient inflammatory myopathy involving the masseter muscle following the third dose of coronavirus disease 2019 (COVID-19) mRNA vaccination. An 80-year-old woman presented with a history of fever and fatigue for 3 months soon after receiving the third COVID-19 mRNA vaccination. Her symptoms progressed to jaw pain and inability to open her mouth. She also experienced mild proximal muscle weakness in the lower limbs but no skin manifestations or daily difficulties. Fat-saturated T2-weighted magnetic resonance imaging showed bilateral high-intensity signals for the masseter and quadriceps muscles. The patient experienced spontaneous resolution of fever and improvement of symptoms 5 months after onset. The timing of the onset of symptoms, the lack of detectable autoantibodies, and the atypical presentation of myopathy in the masseter muscles, in addition to the spontaneous mild course of the disease, all indicate the substantial role of mRNA vaccination in this myopathy. Since then, the patient has been followed up for 4 months without any recurrence of symptoms or any additional treatment. It is important to recognise that the course of myopathy after COVID-19 mRNA vaccination could be different from that of typical idiopathic inflammatory myopathies.
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Affiliation(s)
- Tomomi Tada
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
| | - Haruka Murao
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
| | - Reo Shiratani
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
| | - JeongHoon Park
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
| | | | - Hideaki Kanki
- Department of Neurology, Osaka Police Hospital, Osaka, Japan
| | - Nachi Ishikawa
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
| | - Takayuki Shibahara
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
- Department of Respiratory Medicine and Clinical Immunology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jun Fujimoto
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
- Department of Respiratory Medicine and Clinical Immunology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shinji Higa
- Department of Internal Medicine, Division of Rheumatology, Daini Osaka Police Hospital, Osaka, Japan
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Lindquist KA, Shein SA, Hovhannisyan AH, Mecklenburg J, Zou Y, Lai Z, Tumanov AV, Akopian AN. Associations of tissue damage induced inflammatory plasticity in masseter muscle with the resolution of chronic myalgia. Sci Rep 2023; 13:22057. [PMID: 38086903 PMCID: PMC10716154 DOI: 10.1038/s41598-023-49280-1] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023] Open
Abstract
Gene plasticity during myogenous temporomandibular disorder (TMDM) development is largely unknown. TMDM could be modeled by intramuscular inflammation or tissue damage. To model inflammation induced TMDM we injected complete Freund's adjuvant (CFA) into masseter muscle (MM). To model tissue damage induced TMDM we injected extracellular matrix degrading collagenase type 2 (Col). CFA and Col produced distinct myalgia development trajectories. We performed bulk RNA-seq of MM to generate gene plasticity time course. CFA initiated TMDM (1d post-injection) was mainly linked to chemo-tacticity of monocytes and neutrophils. At CFA-induced hypersensitivity post-resolution (5d post-injection), tissue repair processes were pronounced, while inflammation was absent. Col (0.2U) produced acute hypersensitivity linked to tissue repair without inflammatory processes. Col (10U) generated prolonged hypersensitivity with inflammatory processes dominating initiation phase (1d). Pre-resolution phase (6d) was accompanied with acceleration of expressions for tissue repair and pro-inflammatory genes. Flow cytometry showed that immune processes in MM was associated with accumulations of macrophages, natural killer, dendritic and T-cells, further confirming our RNA-seq findings. Altogether, CFA and Col treatments induced different immune processes in MM. Importantly, TMDM resolution was preceded with muscle cell and extracellular matrix repairs, an elevation in immune system gene expressions and distinct immune cell accumulations in MM.
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Affiliation(s)
- Karen A Lindquist
- Integrated Biomedical Sciences (IBMS) Program, The School of Medicine, The University of Texas Health Science Center at San Antonio (UTHSCSA), 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA
| | - Sergey A Shein
- Departments of Microbiology, Immunology & Molecular Genetics, The School of Medicine, UTHSCSA, San Antonio, TX, 78229, USA
| | - Anahit H Hovhannisyan
- Departments of Endodontics, The School of Dentistry, The University of Texas Health Science Center at San Antonio (UTHSCSA), 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA
| | - Jennifer Mecklenburg
- Departments of Endodontics, The School of Dentistry, The University of Texas Health Science Center at San Antonio (UTHSCSA), 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA
| | - Yi Zou
- Departments of Molecular Medicine, The School of Medicine, UTHSCSA, San Antonio, TX, USA
| | - Zhao Lai
- Departments of Molecular Medicine, The School of Medicine, UTHSCSA, San Antonio, TX, USA
- Greehey Children's Cancer Research Institute, UTHSCSA, San Antonio, TX, 78229, USA
| | - Alexei V Tumanov
- Integrated Biomedical Sciences (IBMS) Program, The School of Medicine, The University of Texas Health Science Center at San Antonio (UTHSCSA), 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA.
- Departments of Microbiology, Immunology & Molecular Genetics, The School of Medicine, UTHSCSA, San Antonio, TX, 78229, USA.
| | - Armen N Akopian
- Integrated Biomedical Sciences (IBMS) Program, The School of Medicine, The University of Texas Health Science Center at San Antonio (UTHSCSA), 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA.
- Departments of Endodontics, The School of Dentistry, The University of Texas Health Science Center at San Antonio (UTHSCSA), 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA.
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Arkadi M, Neupane AK. Multifrequency Analysis of Masseter Vestibular Evoked Myogenic Potentials in Young Adults. Am J Audiol 2023; 32:843-852. [PMID: 37668536 DOI: 10.1044/2023_aja-23-00028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023] Open
Abstract
PURPOSE The purpose of this study was to explore the dynamics of multifrequency tone bursts on the masseter vestibular evoked myogenic potential (mVEMP) parameters. Furthermore, it sought to determine the optimal frequency tuning of mVEMP responses. METHOD Twenty young adults with normal hearing sensitivity participated in the study. Bilateral tone burst evoked mVEMPs were obtained using the zygomatic montage at 250-, 500-, 750-, 1000-, 1500-, and 2000-Hz stimulation frequencies. Self-monitoring biofeedback was given during the procedure to confirm the tension of the masseter muscle between 49.9 and 150.6 rms. Furthermore, the electromyography (EMG) scaling was done to avoid any muscle-related irregularities. RESULTS Tone burst evoked mVEMPs were found to be 100% present at the stimulation frequencies of 250, 500, 750, and 1000 Hz. There were no ear and gender effects seen for any of the frequencies. Significant shortening of the P1 and N1 latencies with increasing stimulation frequencies was observed. The peak-to-peak amplitude was the highest at 500 Hz and lowest at 2000 Hz tone bursts under both EMG scaled and unscaled conditions. CONCLUSION The present revealed higher response rates and larger amplitudes study of mVEMP at lower frequencies, and, therefore, the frequency tuning was seen for the stimulation frequency at 500 Hz.
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Affiliation(s)
- Mugdha Arkadi
- School of Audiology & Speech-Language Pathology, Bharati Vidyapeeth (Deemed to be University), Pune, India
| | - Anuj Kumar Neupane
- School of Audiology & Speech-Language Pathology, Bharati Vidyapeeth (Deemed to be University), Pune, India
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Pittar N, Firth F, Bennani H, Farella M. The effect of passive clear aligners on masticatory muscle activity in adults with different levels of oral parafunction. J Oral Rehabil 2023; 50:1409-1421. [PMID: 37615269 DOI: 10.1111/joor.13575] [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: 02/17/2023] [Revised: 05/13/2023] [Accepted: 08/11/2023] [Indexed: 08/25/2023]
Abstract
BACKGROUND There is limited knowledge of the possible side-effects of clear aligners on jaw function. OBJECTIVES To determine the short-term effect of passive clear aligners (PCAs) on masticatory muscle activity (MMA), occlusal discomfort (OD) and temporomandibular disorder (TMD) symptoms in adults with different levels of self-reported oral parafunction. MATERIALS AND METHODS Participants were screened for oral parafunctional behaviours using the oral behavioural checklist. Respondents in ≥85th and ≤15th percentiles were invited to participate and allocated to a high (HPF: N = 15) or low (lower parafunction [LPF]: N = 16) parafunction group. Participants underwent a TMD clinical examination; somatisation and somatosensory amplification were assessed by questionnaires; OD and stress were assessed by visual analogue scales. While wearing PCAs, awake-time MMA was assessed three times over 9 days using a wearable electromyography device, along with OD, stress and TMD symptoms. RESULTS The wearing of PCAs was associated with a significant decrease in mean contraction episode amplitude in both groups (p = 0.003). OD levels increased and remained raised in all participants after insertion of the PCAs (p < 0.001), more so in the HPF group (p = 0.048). The HPF group had higher somatisation scores (p = 0.006) and reported more TMD symptoms at all time points (p ≤ 0.004). No significant changes in stress or TMD symptoms were found in either group during the study period. CONCLUSIONS PCAs were associated with a decrease in MMA in all participants. HPF individuals had greater somatisation and reported greater discomfort when wearing PCAs than LPF individuals.
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Affiliation(s)
- Nicholas Pittar
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Fiona Firth
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Hamza Bennani
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Mauro Farella
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
- Discipline of Orthodontics, Department of Surgical Sciences, University of Cagliari, Cagliari, Italy
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Gębska M, Dalewski B, Pałka Ł, Kiczmer P, Kołodziej Ł. Effect of physiotherapeutic procedures on the bioelectric activity of the masseter muscle and the range of motion of the temporomandibular joints in the female population with chronic pain: a randomized controlled trial. BMC Oral Health 2023; 23:927. [PMID: 38007478 PMCID: PMC10676580 DOI: 10.1186/s12903-023-03601-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: 06/20/2023] [Accepted: 10/31/2023] [Indexed: 11/27/2023] Open
Abstract
INTRODUCTION Physical therapy (PT) methods applied in dentistry are increasingly discussed nowadays. Taking into account a rapidly growing number of temporomandibular disorders (TMDs) and orofacial pain patients, it is reasonable to determine which of the available physiotherapeutic (PT) methods are more effective than others, especially in terms of their possible analgesic and myorelaxant effects. OBJECTIVE To assess manual and physical factors influencing pain reduction or elimination and increased muscle tension in patients with TMD; yet the influence of the applied forms of PT on the range of motion (ROM) of temporomandibular joints (TMJ). MATERIAL AND METHODS A randomized, parallel-group, RCT, single-blind, equi-randomized (1:1) study was conducted in DC/TMD Group Ib patients (20-45 years of age). An experimental group (G1, n = 104) and a control group without TMD (G2, n = 104) were created according to CONSORT guidelines. Diagnostic measurements were performed in both groups (mass sEMG, temporomandibular joint range of motion-ROM, pain intensity - NRS). Group G1 was randomly divided (envelope method) into 4 therapeutic groups, in which therapy was carried out for 10 days: magnetostimulation (MS), magnetoledotherapy (MLE), magnetolaserotherapy (MLA), manual therapy (MT). Each time after the therapy, ROM and NRS measurements were performed, and after the 5th and 10th day sEMG. RESULTS Statistically significant differences were found in the sEMG values of the masseter muscles, TMJ ROM and the pain intensity in G1 and G2 (p < 0.00). The largest decrease in sEMG (% MVC) of the masseter muscle occurred in the subgroup in which the manual therapy (MT) procedures were applied, p < 0.000. There was no clinically significant difference in and between other subgroups. There was a distinct mandible ROM increase noted in the MT group, with minimal changes in the MLA and MLE groups and no changes in the MS group. There was a clear increase in the lateral mobility of both right and left TMJ in the MT group. There were no differences in the course of the study in the MS group, and slight increases in the MLA and MLE groups. In the case of pain measurements, the greatest decrease in pain intensity was observed in the MT subgroup. CONCLUSIONS According to our results manual therapy is an effective form of treatment in patients with pain, increased masticatory muscle tension and limitation in mandible ROM. Dental physiotherapy should become an integral part of multimodal TMD patients' treatment.
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Affiliation(s)
- Magdalena Gębska
- Department of Rehabilitation Musculoskeletal System, Pomeranian Medical University, Szczecin, 70-204, Poland
| | - Bartosz Dalewski
- Department of Dental Prosthetics, Pomeranian Medical University, Szczecin, 70-204, Poland
- Orofacial Pain Unit, Pomeranian Medical University, Szczecin, 70-204, Poland
| | | | - Paweł Kiczmer
- Department and Chair of Pathomorphology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 13-15 3 Maja, Zabrze, 41-800, Poland
| | - Łukasz Kołodziej
- Department of Rehabilitation Musculoskeletal System, Pomeranian Medical University, Szczecin, 70-204, Poland
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Korkmaz MD, Karacay BC. Do myofascial trigger points in masseter muscles affect the symptoms of disc displacement with reduction? A cross-sectional study. Rev Assoc Med Bras (1992) 2023; 69:e20230622. [PMID: 37971122 PMCID: PMC10645171 DOI: 10.1590/1806-9282.20230622] [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] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 08/26/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVE The aim of this study was to demonstrate the effect of myofascial pain with referral from the trigger points in the masseter muscles on the clinical symptoms and functional limitations of the temporomandibular joint in participants with disc displacement with reduction. METHODS This prospective, cross-sectional study recruited participants aged 18-45 years with disc displacement with reduction with/without myofascial pain with referral in the masseter muscles based on the inclusion criteria. Maximum mouth opening and the presence of probable awake bruxism were assessed. The "Graded Chronic Pain Scale version 2.0" and "Jaw Function Limitation Scale-8" were used to evaluate Diagnostic Criteria for Temporomandibular Disorders Axis II. Pain levels were measured using the Visual Analog Scale. RESULTS A comparison between the disc displacement with reduction and disc displacement with reduction+myofascial pain with referral groups revealed statistically significant differences in Visual Analog Scale (p<0.001), the presence of awake bruxism (p=0.038), and Graded Chronic Pain Scale version 2.0 (p=0.010). However, no statistically significant difference was observed between the two groups concerning maximum mouth opening and Jaw Function Limitation Scale-8. CONCLUSION Participants with both disc displacement with reduction and myofascial pain with referral in the masseter muscle exhibited higher pain intensity, a higher prevalence of awake bruxism, and increased pain-related disability compared to those with disc displacement with reduction alone.
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Affiliation(s)
- Merve Damla Korkmaz
- University of Health Sciences, Kanuni Sultan Suleyman Training and Research Hospital, Department of Physical Medicine and Rehabilitation – Istanbul, Turkey
| | - Basak Cigdem Karacay
- Ahi Evran University, Faculty of Medicine, Department of Physical Medicine and Rehabilitation – Kırşehir, Turkey
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Shi X, Zhang J, Shi G, Zhu J. Mesencephalic trigeminal nucleus neurons with collaterals to both eyelid and masseter muscles shown by fluorescent double-labeling, revealing a potential mechanism for Marcus Gunn Syndrome. PLoS One 2023; 18:e0293372. [PMID: 37934736 PMCID: PMC10629631 DOI: 10.1371/journal.pone.0293372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 10/10/2023] [Indexed: 11/09/2023] Open
Abstract
Poking palpebral conjunctiva evoked upper-eyelid retraction during ophthalmic surgery. Iatrogenic eyelid ptosis occurred if eyelid branch of lachrymal nerve was sectioned. Mesencephalic trigeminal nucleus (Vme) neurons were labeled when tracer injected into lachrymal nerve innervating eyelid Mueller's muscle. Masseter afferent Vme neurons projecting to oculomotor nucleus (III) was observed in toad and rat, which helps amphibians to stare prey when they open mouth widely to prey. We hypothesized single Vme neurons may have peripheral collaterals to both eyelid and masseter muscles. WGA-594 was injected into upper eyelid, and WGA-488 was simultaneously delivered into ipsilateral masseter muscle in the same rat. Then, double labeled Vme neurons were found under both conventional and confocal microscope. Meanwhile, contact of WGA-594 positive eyelid afferent Vme neurons with WGA-488 labeled masseter afferent ones were observed sometimes. Combined with our previous observation of oculomotor projection Vme neurons, we thought WGA-594/488 double labeled Vme cells, at least some of them, are oculomotor projecting ones. Contact between eyelid and masseter afferent Vme neurons are supposed to be electrotonically coupled, based on a line of previous studies. If exogenous or genetic factors make these Vme neurons misinterpret masseter input as eyelid afferent signals, these Vme neurons might feedforward massages to eyelid retractor motoneurons in the III. Besides, oculomotor projecting Vme neurons might be co-fired by adjacent masseter afferent Vme neurons through electrotonic coupling once the masseter muscle is activated. In these cases, Marcus Gunn Syndrome might occur. This finding leads to a new hypothesis for the Syndrome.
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Affiliation(s)
- Xue Shi
- Department of Anesthesiology, Hubei Key Laboratory of Geriatric Anesthesia & Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingdong Zhang
- Department of Anesthesiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Gaiping Shi
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Junyi Zhu
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
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Yıldız NT, Kocaman H, Yıldırım H. Predictors of the masticatory muscle activity during chewing in patients with myogenous temporomandibular disorder. Clin Oral Investig 2023; 27:6547-6558. [PMID: 37737891 DOI: 10.1007/s00784-023-05260-3] [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: 06/27/2023] [Accepted: 09/11/2023] [Indexed: 09/23/2023]
Abstract
OBJECTIVES The aim of the study was to identify predictors of the masticatory muscle activity during chewing (MMA) of the masseter and temporalis anterior (TA) muscles in patients with unilateral myogenous temporomandibular disorder (mTMD). MATERIALS AND METHODS This observational and cross-sectional study included 109 patients diagnosed with unilateral mTMD. Surface electromyography was used to separately evaluate the MMA of the masseter and TA on the affected and unaffected sides. Also, pain intensity (with a visual analog scale), pressure pain threshold (with an algometer), active pain-free maximum mouth opening and temporomandibular joint lateral movements (with a ruler), cervical range of motions (with a goniometer), and TMD severity (with a Fonseca Anamnestic Index) were assessed. Various statistical methods were used to predict the MMA of the masseter and TA, including standard, forward, and best subsets multiple regression models. RESULTS While there were significant correlations between the MMA of the masseter and TA and pain intensity, pressure pain threshold values, and TMD severity, they were not found with other variables. These parameters were also predictive factors for MMA of both muscles (p < 0.05). CONCLUSIONS According to the present study, pain intensity, muscle and joint tenderness, and the severity of the disorder are predictive factors for MMA of the masseter and TA muscles in patients with mTMD. It is recommended that these parameters be considered when establishing clinical evaluation and treatment programs focusing on MMA in patients with mTMD. CLINICAL RELEVANCE The pain intensity, masticatory muscles and TMJ tenderness, and disorder severity are predictors for MMA of the masseter and TA in patients with mTMD. Pain intensity has the most significant importance.
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Affiliation(s)
- Nazım Tolgahan Yıldız
- Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, Karamanoğlu Mehmetbey University, Karaman, Turkey.
| | - Hikmet Kocaman
- Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, Karamanoğlu Mehmetbey University, Karaman, Turkey
| | - Hasan Yıldırım
- Kamil Özdağ Faculty of Science, Department of Mathematics, Karamanoğlu Mehmetbey University, Karaman, Turkey
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Jeffery N, Manson A. Postnatal growth and spatial conformity of the cranium, brain, eyeballs and masseter muscles in the macaque (Macaca mulatta). J Anat 2023; 243:590-604. [PMID: 37300248 PMCID: PMC10485578 DOI: 10.1111/joa.13911] [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: 10/04/2022] [Revised: 05/15/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
Spatial growth constraints in the head region can lead to coordinated patterns of morphological variation that pleiotropically modify genetically defined phenotypes as the tissues compete for space. Here we test for such architectural modifications during rhesus macaque (Macaca mulatta) postnatal ontogeny. We captured cranium and brain shape from 153 MRI datasets spanning 13 to 1090 postnatal days and tested for patterns of covariation with measurements of relative brain, eyeball, and masseter muscle size as well as callosal tract length. We find that the shape of the infant (<365 days) macaque cranium was most closely aligned to masseter muscle and brain size measured relative to face size. Infant brain and juvenile (365-1090 days) cranium shape were more closely linked with brain size relative to basicranium and face size. Meanwhile, the juvenile macaque brain shape was dominated by the size of the brain relative to that of the basicranium. Associations with relative eyeball size and commissural tract lengths were weaker. Our results are consistent with a spatial-packing regime operating during postnatal macaque ontogeny, in which relative growth of the masseter, face and basicranium have a greater influence than brain growth on the overall shape of the cranium and brain.
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Affiliation(s)
- Nathan Jeffery
- Department of Musculoskeletal & Ageing Science, Institute of Life Course & Medical Sciences (ILCaMS) and Human Anatomy Resource Centre (HARC), Education Directorate, University of Liverpool, Liverpool, UK
| | - Amy Manson
- Department of Musculoskeletal & Ageing Science, Institute of Life Course & Medical Sciences (ILCaMS) and Human Anatomy Resource Centre (HARC), Education Directorate, University of Liverpool, Liverpool, UK
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De Souza AB, Papaspyridakos P, Weber HP, Vazouras K, Matarazzo F. Effect of dental implant therapy on the preservation of orofacial tissues: A systematic review and meta-analysis. Clin Oral Implants Res 2023; 34 Suppl 26:240-256. [PMID: 37750525 DOI: 10.1111/clr.14106] [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: 11/03/2022] [Revised: 05/22/2023] [Accepted: 05/22/2023] [Indexed: 09/27/2023]
Abstract
OBJECTIVE Fundamentally, this review addresses the following question: In partially or fully edentulous patients, do implant-supported dental prostheses preserve orofacial tissues when compared to conventional prostheses or no therapy? MATERIALS AND METHODS This study was conducted according to the 2020 PRISMA guidelines for systematic reviews. Electronic searches were conducted at PubMed and Embase databases followed by manual search. Clinical studies comparing the effect of implant-supported prostheses with conventional rehabilitation or no treatment on alveolar bone resorption, remaining teeth, and jaw muscle thickness were considered for inclusion. A qualitative synthesis was conducted with all included studies, and data from selected studies were pooled quantitatively to perform a meta-analysis. RESULTS A total of 14 studies were selected for analysis. Six studies reported on the effect of implant therapy on alveolar bone resorption (n = 453), six on the remaining teeth (n = 1014), while four studies evaluated masseter muscle thickness (n = 158). The results of the meta-analyses assessing alveolar bone resorption in the posterior mandible and in the anterior area of the maxilla, both fixed and random effects models, yielded no benefit of rehabilitation with implant-supported prostheses when compared to conventional prostheses. For masseter bone thickness, however, a significant benefit for implant-supported prosthesis was observed. CONCLUSIONS This systematic review and meta-analysis were unable to unequivocally answer the focus question. There are some indicators of the benefit of implant-supported prostheses over conventional prostheses or no therapy in preserving orofacial tissues, particularly for masseter muscle thickness. However, the evidence is still insufficient to confirm such perception.
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Affiliation(s)
- André B De Souza
- Department of Periodontology, Nova Southeastern University, Fort Lauderdale, Florida, USA
| | - Panos Papaspyridakos
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts, USA
| | - Hans-Peter Weber
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts, USA
| | - Konstantinos Vazouras
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts, USA
| | - Flavia Matarazzo
- Department of Dentistry, State University of Maringá, Maringá, Brazil
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de Macedo CF, Sonza A, Puel AN, dos Santos AR. Trigger point dry needling increases masseter muscle oxygenation in patients with temporomandibular disorder. J Appl Oral Sci 2023; 31:e20230099. [PMID: 37646716 PMCID: PMC10501752 DOI: 10.1590/1678-7757-2023-0099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/15/2023] [Accepted: 07/13/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Temporomandibular disorder (TMD) is an umbrella term encompassing various clinical complaints involving the temporomandibular joints, masticatory muscles, and/or associated orofacial structures. Myogenous TMDs are the most frequent cause of chronic orofacial pain. Musculoskeletal pain is commonly associated with myofascial trigger points (MTPs), for which dry needling (DN) is a routine treatment. OBJECTIVE To investigate muscle oxygenation and pain immediately after DN application on an MTP in the masseter muscle of patients with myogenous TMDs. METHODOLOGY Masseter muscle oxygen tissue saturation indices (TSI%) were assessed by near-infrared spectroscopy (NIRS) pre- and post-interventions by a randomized, controlled, double-blind, crossover DN/Sham clinical trial (primary outcome). Pain was investigated by the visual analog scale (VAS). In total, 32 individuals aged from 18 to 37 years who were diagnosed with myogenous TMD and myofascial trigger points in their masseter muscles participated in this study. Relative deltas for the studied variables were calculated. Data normality was tested using the Shapiro-Wilk test. According to their distribution, data were analyzed by two-way ANOVA and the Student's t-, and Mann-Whitney tests. Statistical analyses were performed using Prism® 5.0 (GraphPad, USA). RESULTS We found a significant difference (2,108% vs. 0,142%) between masseter muscle TSI% deltas after the DN and Sham interventions, respectively (n=24). We only evaluated women since men refused to follow NIRS procedures. Pain increased immediately after DN (n=32, 8 men), in comparison to Sham delta VAS. CONCLUSION These findings show an increase in tissue oxygen saturation in the evaluated sample immediately after the DN intervention on the MTP of patients' masseter muscle. Pain may have increased immediately after DN due to the needling procedure.
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Affiliation(s)
- Carolina Ferreira de Macedo
- Universidade Federal de Santa CatarinaCentro de Ciências BiológicasDepartamento de Ciências FisiológicasSanta CatarinaBrasilUniversidade Federal de Santa Catarina, Centro de Ciências Biológicas, Departamento de Ciências Fisiológicas, Programa de Pós-Graduação em Neurociências Florianópolis, Laboratório de Neurobiologia da Dor e Inflamação, Santa Catarina, Brasil.
| | - Anelise Sonza
- Universidade do Estado de Santa CatarinaPrograma de Pós-Graduação em FisioterapiaSanta CatarinaBrasilUniversidade do Estado de Santa Catarina (UDESC), Programa de Pós-Graduação em Fisioterapia, Florianópolis, Laboratório de Desenvolvimento e Controle Postural (LADESCOP), Santa Catarina, Brasil.
- Universidade do Estado de Santa CatarinaCentro de Ciências da Saúde e EsporteDepartamento de FisioterapiaSanta CatarinaBrasilUniversidade do Estado de Santa Catarina (UDESC), Centro de Ciências da Saúde e Esporte, Departamento de Fisioterapia, Programa de Pós-Graduação em Ciências do Movimento Humano, Santa Catarina, Brasil.
| | - Alexia Nadine Puel
- Universidade do Estado de Santa CatarinaPrograma de Pós-Graduação em FisioterapiaSanta CatarinaBrasilUniversidade do Estado de Santa Catarina (UDESC), Programa de Pós-Graduação em Fisioterapia, Florianópolis, Laboratório de Desenvolvimento e Controle Postural (LADESCOP), Santa Catarina, Brasil.
| | - Adair Roberto dos Santos
- Universidade Federal de Santa CatarinaCentro de Ciências BiológicasDepartamento de Ciências FisiológicasSanta CatarinaBrasilUniversidade Federal de Santa Catarina, Centro de Ciências Biológicas, Departamento de Ciências Fisiológicas, Programa de Pós-Graduação em Neurociências Florianópolis, Laboratório de Neurobiologia da Dor e Inflamação, Santa Catarina, Brasil.
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Siwetz M, Widni-Pajank H, Hammer N, Pilsl U, Bruneder S, Wree A, Antipova V. The Course and Variation of the Facial Vein in the Face-Known and Unknown Facts: An Anatomical Study. Medicina (Kaunas) 2023; 59:1479. [PMID: 37629769 PMCID: PMC10456631 DOI: 10.3390/medicina59081479] [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] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/10/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023]
Abstract
Background and Objectives: The facial vein is the main collector of venous blood from the face. It plays an important role in physiological as well as pathological context. However, to date, only limited data on the course and tributaries of the facial vein are present in contemporary literature. The aim of this study was to provide detail on the course and the tributaries of the facial vein. Materials and Methods: In 96 sides of 53 body donors, latex was injected into the facial vein. Dissection was carried out and the facial vein and its tributaries (angular vein, ophthalmic vein, nasal veins, labial veins, palpebral veins, buccal and masseteric veins) were assessed. Results: The facial vein presented a textbook-like course in all cases and crossed the margin of the mandible anterior to the masseter in 6.8% of cases, while being located deep to the zygomaticus major muscle in all cases and deep to the zygomaticus minor in 94.6% of cases. Conclusions: This work offers detailed information on the course of the facial vein in relation to neighboring structures, which shows a relatively consistent pattern, as well as on its tributaries, which show a high variability.
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Affiliation(s)
- Martin Siwetz
- Division of Macroscopic and Clinical Anatomy, Gottfried Schatz Research Center, Medical University of Graz, Auenbruggerplatz 25, A-8036 Graz, Austria
| | - Hannes Widni-Pajank
- Division of Macroscopic and Clinical Anatomy, Gottfried Schatz Research Center, Medical University of Graz, Auenbruggerplatz 25, A-8036 Graz, Austria
- Department of Oral and Maxillofacial Surgery, Klagenfurt Am Wörthersee Clinic, Feschnigstraße 11, A-9020 Klagenfurt am Wörthersee, Austria
| | - Niels Hammer
- Division of Macroscopic and Clinical Anatomy, Gottfried Schatz Research Center, Medical University of Graz, Auenbruggerplatz 25, A-8036 Graz, Austria
- Department of Orthopedic and Trauma Surgery, University of Leipzig, D-04103 Leipzig, Germany
- Division of Biomechatronics, Fraunhofer Institute for Machine Tools and Forming Technology Dresden, D-09126 Dresden, Germany
| | - Ulrike Pilsl
- Division of Macroscopic and Clinical Anatomy, Gottfried Schatz Research Center, Medical University of Graz, Auenbruggerplatz 25, A-8036 Graz, Austria
| | - Simon Bruneder
- Department of Oral and Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5, A-8036 Graz, Austria
| | - Andreas Wree
- Institute of Anatomy, Rostock University Medical Center, Gertrudenstr. 9, D-18057 Rostock, Germany
| | - Veronica Antipova
- Division of Macroscopic and Clinical Anatomy, Gottfried Schatz Research Center, Medical University of Graz, Auenbruggerplatz 25, A-8036 Graz, Austria
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Telich-Tarriba JE, Navarro-Barquin DF, Pineda-Aldana G, Cardenas-Mejia A. Triple nerve transfers for the management of early unilateral facial palsy. J Plast Surg Hand Surg 2023; 58:62-66. [PMID: 37554097 DOI: 10.2340/jphs.v58.6527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 04/02/2023] [Indexed: 08/10/2023]
Abstract
BACKGROUND Early onset facial paralysis is usually managed with cross-face nerve grafts, however the low number of axons that reach the target muscle may result in weakness or failure. Multiple-source innervation, or 'supercharging', seeks to combine the advantages of different donor nerves while minimizing their weaknesses. We propose a combination of cross-face nerve grafts with local extra-facial nerve transfers to achieve earlier facial reanimation in our patients. METHODS A retrospective cohort including all patients with early unilateral facial palsy (<12 months evolution) who underwent triple nerve transfer between 2019 and 2021 was conducted. We performed single-stage procedure including zygomatic-to-zygomatic and buccal-to-buccal cross-face grafts, a nerve-to-masseter to bucozygomatic trunk transfer, and a mini-hypoglossal to marginal branch transfer. Results were evaluated using the clinician-graded facial function scale (eFACE). RESULTS Fifteen patients were included (eight females, seven males), mean age at the time of surgery was 48.9 ± 13.3 years. Palsy was right-sided in eight cases. The mean time from palsy onset to surgery was 5.5 ± 2.8 months. Patients showed improvement in static (70.8 ± 21.9 vs. 84.15 ± 6.68, p = 0.002) and dynamic scores (20 ± 16.32 vs. 74.23 ± 7.46, p < 0.001), as well as periocular (57.33 ± 15.23 vs. 74 ± 7.18, p = 0.007), smile (54.73 ± 11.93 vs. 85.62 ± 3.86, p < 0.001), mid-face (46.33 ± 18.04 vs. 95 ± 7.21, p < 0.001) and lower face scores (67.4 ± 1.55 vs. 90.31 ± 7.54, p < 0.001). CONCLUSION The triple nerve transfer technique using cross-face nerve grafts, the nerve-to-masseter, and the hypoglossal nerve, is an effective and reproducible technique to obtain middle and lower face reanimation in cases of early facial palsy.
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Affiliation(s)
- Jose E Telich-Tarriba
- Plastic and Reconstructive Surgery Division, Hospital General 'Dr. Manuel Gea Gonzalez', Mexico City, Mexico; Plastic Surgery Department, Hospital Angeles Pedregal, Mexico City, Mexico.
| | - David F Navarro-Barquin
- Plastic and Reconstructive Surgery Division, Hospital General 'Dr. Manuel Gea Gonzalez', Mexico City, Mexico
| | - Genesis Pineda-Aldana
- Plastic and Reconstructive Surgery Division, Hospital General 'Dr. Manuel Gea Gonzalez', Mexico City, Mexico
| | - Alexander Cardenas-Mejia
- Plastic and Reconstructive Surgery Division, Hospital General 'Dr. Manuel Gea Gonzalez', Mexico City, Mexico
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Kuang B, Aarab G, Wei Y, Blanken TF, Lobbezoo F, Someren EJWV, Ramautar JR, Wassing R. Associations between signs of sleep bruxism and insomnia: A polysomnographic study. J Sleep Res 2023; 32:e13827. [PMID: 36703561 PMCID: PMC10909425 DOI: 10.1111/jsr.13827] [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: 09/08/2022] [Revised: 12/15/2022] [Accepted: 12/28/2022] [Indexed: 01/28/2023]
Abstract
Sleep bruxism (SB) is a repetitive jaw-muscle activity characterised by clenching or grinding of the teeth and/or by bracing or thrusting of the mandible. Sleep bruxism has been linked with insomnia symptoms. Moreover, it has been suggested that there is a positive association between distress and the occurrence of sleep bruxism. However, the occurrence of sleep bruxism and its association with distress have not been studied in patients with insomnia. Therefore, we hypothesised that: (1) the occurrence of sleep bruxism is higher in patients with insomnia than in healthy controls; and (2) the occurrence of sleep bruxism in insomnia patients with moderate to high distress (IMHD) is higher than that in insomnia patients with slight distress (ISD). A total of 44 controls (34 females, 10 males, mean ± SD age = 46.8 ± 14.4 years) and 42 participants with insomnia (35 females, 7 males, mean ± SD age = 51.3 ± 12.1 years) were enrolled in this study. Among 42 participants with insomnia, 20 participants were subtyped as IMHD, 17 participants as ISD. Another five participants were not subtyped due to insufficient information. Group differences in rhythmic masticatory muscle activity (RMMA), a biomarker of sleep bruxism, were evaluated with Mann-Whitney U tests. The medians and interquartile ranges of the RMMA indices were 0.8|1.8|3.3 in controls, 1.1|1.6|2.3 in IMHD and 1.2|1.9|2.9 in ISD. There was no significant difference in the RMMA index, neither between participants with insomnia and controls (P = 0.514) nor between IMHD versus ISD (P = 0.270). The occurrence of RMMA indicators of possible sleep bruxism is not significantly different between individuals with insomnia and controls, nor between IMHD versus ISD.
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Affiliation(s)
- Boyuan Kuang
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA)University of Amsterdam and Vrije Universiteit AmsterdamAmsterdamThe Netherlands
- Taikang Bybo DentalBeijingChina
| | - Ghizlane Aarab
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA)University of Amsterdam and Vrije Universiteit AmsterdamAmsterdamThe Netherlands
| | - Yishul Wei
- Department of Sleep and CognitionNetherlands Institute for Neuroscience (NIN), an Institute of the Royal Netherlands Academy of Arts and SciencesAmsterdamThe Netherlands
| | - Tessa F. Blanken
- Department of Sleep and CognitionNetherlands Institute for Neuroscience (NIN), an Institute of the Royal Netherlands Academy of Arts and SciencesAmsterdamThe Netherlands
- Department of Psychological MethodsUniversity of AmsterdamAmsterdamThe Netherlands
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA)University of Amsterdam and Vrije Universiteit AmsterdamAmsterdamThe Netherlands
| | - Eus J. W. Van Someren
- Department of Sleep and CognitionNetherlands Institute for Neuroscience (NIN), an Institute of the Royal Netherlands Academy of Arts and SciencesAmsterdamThe Netherlands
- Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research (CNCR), Amsterdam NeuroscienceVrije Universiteit AmsterdamAmsterdamThe Netherlands
- Department of Psychiatry, Amsterdam Public Health Research Institute and Amsterdam Neuroscience Research Institute, Amsterdam UMCVrije Universiteit AmsterdamAmsterdamThe Netherlands
| | - Jennifer R. Ramautar
- Department of Sleep and CognitionNetherlands Institute for Neuroscience (NIN), an Institute of the Royal Netherlands Academy of Arts and SciencesAmsterdamThe Netherlands
- N=You Neurodevelopmental Precision Center, Amsterdam NeuroscienceAmsterdam Reproduction and Development, Amsterdam UMCAmsterdamThe Netherlands
- Child and Adolescent Psychiatry and Psychosocial Care, Emma Children's Hospital, Amsterdam UMCVrije Universiteit AmsterdamAmsterdamthe Netherlands
| | - Rick Wassing
- Department of Sleep and CognitionNetherlands Institute for Neuroscience (NIN), an Institute of the Royal Netherlands Academy of Arts and SciencesAmsterdamThe Netherlands
- Centre for Sleep and Chronobiology, Woolcock Institute of Medical ResearchThe University of SydneySydneyNew South WalesAustralia
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Yang SM, Wu HW, Lin YH, Lai TJ, Lin MT. Temporalis and masseter muscle thickness as predictors of post-stroke dysphagia after endovascular thrombectomy. Eur J Radiol 2023; 165:110939. [PMID: 37354770 DOI: 10.1016/j.ejrad.2023.110939] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 05/16/2023] [Revised: 06/15/2023] [Accepted: 06/17/2023] [Indexed: 06/26/2023]
Abstract
PURPOSE Post-stroke dysphagia (PSD) is a common sequela of stroke. Given the association between dysphagia and sarcopenia, we aimed to investigate the association between PSD and temporal muscle thickness (TMT) and masseter muscle thickness (MMT) following endovascular thrombectomy (EVT) in patients with large-vessel occlusion (LVO). METHODS This retrospective cohort study included hospitalized patients with LVO stroke who underwent EVT between January 1, 2018, and October 31, 2022. TMT and MMT were measured using brain computed tomography (CT) angiography. The correlation between relevant clinicodemographic factors and both TMT and MMT was examined. The relationship between each of two parameters (TMT and MMT) and PSD, which was defined as the retention of the nasogastric (NG) tube at 4 and 12 weeks, was evaluated in adjusted logistic regression models. RESULTS Among the 148 participants, the mean TMT and MMT was 5.9 ± 1.6 and 11.2 ± 2.3 mm, respectively. Lower age, male sex, higher body mass index (BMI), higher albumin levels, and a lower initial National Institute of Health Stroke Scale (NIHSS) score were associated with higher TMT and MMT (p < 0.05). In the logistic regression analysis adjusted for age, sex, BMI, serum albumin, and NIHSS score, lower TMT and MMT significantly correlated with PSD at weeks 4 and 12 (p < 0.001). CONCLUSION TMT and MMT are associated with age, sex, BMI, albumin, and the initial NIHSS score. Both TMT and MMT are independent indicators of post-EVT PSD in stroke patients and serve as reliable predictors of NG removal.
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Affiliation(s)
- Shu-Mei Yang
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu, Taiwan
| | - Hao-Wei Wu
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu, Taiwan
| | - Yen-Heng Lin
- Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan
| | - Ting-Ju Lai
- Department of Medical Research, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu, Taiwan
| | - Meng-Ting Lin
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.
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Zieliński G, Matysik-Woźniak A, Baszczowski M, Rapa M, Ginszt M, Szkutnik J, Rejdak R, Gawda P. Exploratory Study on Central Sensitization and Bioelectrical Activity of the Selected Masticatory Muscles in Subjects with Myopia. Int J Environ Res Public Health 2023; 20:4524. [PMID: 36901544 PMCID: PMC10001754 DOI: 10.3390/ijerph20054524] [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] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/25/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Myopia is one of the most common eye disorders involving abnormal focusing of light rays. The studies recognize the association between the stomatognathic and visual systems. This compound may have a neurological basis associated with disorders such as central sensitization. The main aim of this study was to evaluate the influence of central sensitization on the bioelectrical activity of selected muscles of the masticatory organ in subjects with myopia. METHODS Selected masticatory and cervical spine muscles were analyzed using an eight-channel BioEMG III electromyograph. Central sensitization was analyzed using the central sensitization inventory. RESULTS Statistical analysis revealed significantly higher scores on the central sensitization inventory in subjects with axial myopia compared to subjects without refractive error. Repeated positive correlations were observed in the sternocleidomastoid muscle activity and negative correlations in the digastric muscle activity during open and closed eyes in myopic subjects. CONCLUSIONS Subjects with myopia have an increased score in the central sensitization inventory. The increase in the central sensitization inventory score is connected with the changes within the electromyographic activity of the masticatory and neck muscles. The effect of central sensitization on masticatory muscle activity in myopic subjects requires further study.
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Affiliation(s)
- Grzegorz Zieliński
- Department of Sports Medicine, Medical University of Lublin, 20-093 Lublin, Poland
| | - Anna Matysik-Woźniak
- Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Michał Baszczowski
- Interdisciplinary Scientific Group of Sports Medicine, Department of Sports Medicine, Medical University of Lublin, 20-093 Lublin, Poland
| | - Maria Rapa
- Students’ Scientific Association at the Department and Clinic of General and Pediatric Ophthalmology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Michał Ginszt
- Department of Rehabilitation and Physiotherapy, Medical University of Lublin, 20-093 Lublin, Poland
| | - Jacek Szkutnik
- Independent Unit of Functional Masticatory Disorders, Medical University of Lublin, 20-093 Lublin, Poland
| | - Robert Rejdak
- Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Piotr Gawda
- Department of Sports Medicine, Medical University of Lublin, 20-093 Lublin, Poland
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Lee S, Ju H, Ho D, Song B, Jeong S, Ahn Y, Ok S, Cheon K. Establishment of quantitative indicators for an efficient treatment on masticatory muscle pain. Clin Exp Dent Res 2023; 9:219-229. [PMID: 36562248 PMCID: PMC9932258 DOI: 10.1002/cre2.705] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 12/01/2022] [Accepted: 12/10/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Although several studies have investigated effective treatments for masticatory muscle pain (MMP), no unified conclusion has been drawn regarding the effectiveness of these treatments. OBJECTIVES This study aimed to define quantitative indicators for predicting the outcome of MMP treatment. MATERIALS AND METHODS In total, patients aged 20-70 years were recruited and divided into the MMP (n = 24) and control (n = 36) groups, based on the presence of MMP according to the Diagnostic Criteria for Temporomandibular Disorders. At pretreatment, the MMP group was assessed using quantitative indicators such as subjective pain levels, pain duration, graded chronic pain scale (GCPS), and perceived stress scale (PSS). Salivary alpha-amylase (sAA) and interleukin-6 (IL-6) levels were analyzed. The masticatory muscle palpation score and the range of mouth opening were measured. At posttreatment, subjective pain levels, mouth opening, and treatment/medication duration were examined. The PSS and sAA levels were assessed in the control group. RESULTS sAA levels in the MMP group were significantly higher than those in the control group (p < .05). The masseter muscle palpation score (MPS) showed a positive correlation with IL-6 levels (ρ = 0.503, p < .05) and a negative correlation with nonsteroidal anti-inflammatory drug (NSAID) treatment period (ρ = -0.462, p < .05). The temporalis muscle palpation score (TPS) was positively correlated with pain duration and GCPS grade (ρ = 0.483, p < .05, and ρ = 0.445, p < .05, respectively). CONCLUSIONS Treatment with NSAIDs was effective in the MMP group with high MPS and IL-6 levels, but not in the MMP group with high TPS, pain duration, and GCPS grade.
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Affiliation(s)
- Sunhee Lee
- Department of Oral Medicine, Dental and Life Science InstitutePusan National UniversityYangsanRepublic of Korea
| | - Hye‐Min Ju
- Department of Oral Medicine, Dental and Life Science InstitutePusan National UniversityYangsanRepublic of Korea
- Dental Research Institute, Pusan National University Dental HospitalYangsanRepublic of Korea
| | - Donald Ho
- Department of Pediatric DentistryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Byong‐Sop Song
- Department of StatisticsGraduate School of the Pusan National UniversityBusanRepublic of Korea
| | - Sung‐Hee Jeong
- Department of Oral Medicine, Dental and Life Science InstitutePusan National UniversityYangsanRepublic of Korea
- Dental Research Institute, Pusan National University Dental HospitalYangsanRepublic of Korea
| | - Yong‐Woo Ahn
- Department of Oral Medicine, Dental and Life Science InstitutePusan National UniversityYangsanRepublic of Korea
- Dental Research Institute, Pusan National University Dental HospitalYangsanRepublic of Korea
| | - Soo‐Min Ok
- Department of Oral Medicine, Dental and Life Science InstitutePusan National UniversityYangsanRepublic of Korea
- Dental Research Institute, Pusan National University Dental HospitalYangsanRepublic of Korea
| | - Kyounga Cheon
- Department of Pediatric DentistryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
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Makar D, Nazemi A, Gong SG, Bhardwaj N, De Guzman R, Sessle BJ, Cioffi I. Development of a model to investigate the effects of prolonged ischaemia on the muscles of mastication of male Sprague Dawley rats. Arch Oral Biol 2023; 146:105602. [PMID: 36543038 DOI: 10.1016/j.archoralbio.2022.105602] [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: 05/20/2022] [Revised: 12/02/2022] [Accepted: 12/04/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The aims of this study were to develop a novel rodent model of masticatory muscle ischaemia via unilateral ligation of the external carotid artery (ECA), and to undertake a preliminary investigation to characterize its downstream effects on mechanosensitivity and cellular features of the masseter and temporalis muscles. DESIGN The right ECA of 18 male Sprague-Dawley rats was ligated under general anaesthesia. Mechanical detection thresholds (MDTs) at the masseter and temporalis bilaterally were measured immediately before ECA ligation and after euthanasia at 10-, 20-, and 35-days (n = 6 rats/timepoint). Tissue samples from both muscles and sides were harvested for histological analyses and for assessing changes in the expression of markers of hypoxia and muscle degeneration (Hif-1α, VegfA, and Fbxo32) via real time PCR. Data were analyzed using mixed effect models and non-parametric tests. Statistical significance was set at p < 0.05. RESULTS MDTs were higher in the right than left hemiface (p = 0.009) after 20 days. Histological changes indicative of muscle degeneration and fibrosis were observed in the right muscles. Hif-1α, VegfA, and Fbxo32 were more highly expressed in the masseter than temporalis muscles (all p < 0.05). Hif-1α and, VegfA did not change significantly with time in all muscles (all p > 0.05). Fbxo32 expression gradually increased in the right masseter (p = 0.024) and left temporalis (p = 0.05). CONCLUSIONS ECA ligation in rats induced hyposensitivity in the homolateral hemiface after 20 days accompanied by tissue degenerative changes. Our findings support the use of this model to study pathophysiologic mechanisms of masticatory muscle ischaemia in larger investigations.
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Affiliation(s)
- D Makar
- University of Toronto, Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain Research, Toronto, ON, Canada; University of Toronto, Faculty of Dentistry, Graduate Orthodontics, Toronto, ON, Canada
| | - A Nazemi
- University of Toronto, Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain Research, Toronto, ON, Canada
| | - S G Gong
- University of Toronto, Faculty of Dentistry, Graduate Orthodontics, Toronto, ON, Canada
| | - N Bhardwaj
- University of Toronto, Faculty of Medicine, Department of Comparative Medicine, Toronto, ON, Canada; Peter Gilgan Centre for Research and Learning, Sickkids Hospital, Toronto, ON, Canada
| | - R De Guzman
- University of Toronto, Faculty of Medicine, Department of Comparative Medicine, Toronto, ON, Canada
| | - B J Sessle
- University of Toronto, Faculty of Dentistry, Toronto, ON, Canada; University of Toronto, Faculty of Medicine, Department of Physiology, Toronto, ON, Canada
| | - I Cioffi
- University of Toronto, Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain Research, Toronto, ON, Canada; Mount Sinai Hospital, Department of Dentistry, Toronto, ON, Canada; University of Toronto, Faculty of Dentistry, Graduate Orthodontics, Toronto, ON, Canada.
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Vieira MDA, de Oliveira-Souza AIS, Hahn G, Bähr L, Armijo-Olivo S, Ferreira APDL. Effectiveness of Biofeedback in Individuals with Awake Bruxism Compared to Other Types of Treatment: A Systematic Review. Int J Environ Res Public Health 2023; 20:1558. [PMID: 36674315 PMCID: PMC9863342 DOI: 10.3390/ijerph20021558] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/04/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Excessive masticatory muscle activity is generally present in awake bruxism, which is related to increased anxiety and stress. It has been hypothesized that biofeedback could potentially manage awake bruxism, however, its effectiveness has not been empirically analyzed in a systematic manner. Therefore, this systematic review was designed to determine the effectiveness of biofeedback compared to other therapies in adults with awake bruxism. Extensive searches in five databases looking for randomized controlled trials (RCTs) that included biofeedback to manage awake bruxism were targeted. The risk of bias (RoB) assessment was conducted using the Cochrane RoB-2 tool. Overall, four studies were included in this systematic review, all of which used the electromyographic activity of the masticatory muscles during the day and night as the main endpoint. Auditory and visual biofeedback could reduce the excessive level of masticatory muscle activity in a few days of intervention. The majority of the included studies had a high RoB and only one study had a low RoB. The standardization of the biofeedback protocols was also inconsistent, which makes it difficult to establish the ideal protocol for the use of biofeedback in awake bruxism. Thus, it is proposed that future studies seek to reduce methodological risks and obtain more robust samples.
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Affiliation(s)
- Maryllian de Albuquerque Vieira
- Kinesiotherapy and Manual Therapeutic Resources Laboratory, Department of Physical Therapy, Federal University of Pernambuco, Recife 50740-560, Brazil
| | | | - Gesa Hahn
- Faculty of Business and Social Sciences, University of Applied Sciences, Hochschule Osnabrück, 49076 Osnabrück, Germany
| | - Luisa Bähr
- Faculty of Business and Social Sciences, University of Applied Sciences, Hochschule Osnabrück, 49076 Osnabrück, Germany
| | - Susan Armijo-Olivo
- Faculty of Business and Social Sciences, University of Applied Sciences, Hochschule Osnabrück, 49076 Osnabrück, Germany
- Faculty of Rehabilitation Medicine/Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Ana Paula de Lima Ferreira
- Kinesiotherapy and Manual Therapeutic Resources Laboratory, Department of Physical Therapy, Federal University of Pernambuco, Recife 50740-560, Brazil
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Agarwal V, Gupta A, Singh H, Kamboj M, Popli H, Saroha S. Comparative Efficacy of Platelet-Rich Plasma and Dry Needling for Management of Trigger Points in Masseter Muscle in Myofascial Pain Syndrome Patients: A Randomized Controlled Trial. J Oral Facial Pain Headache 2022; 36:253–262. [PMID: 36445907 PMCID: PMC10586585 DOI: 10.11607/ofph.3188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 07/17/2022] [Indexed: 11/30/2022]
Abstract
AIMS To compare the efficacy of platelet-rich plasma (PRP) injection vs dry needling (DN) for management of trigger points in the masseter muscle in myofascial pain syndrome (MPS) patients. METHODS This randomized controlled trial included 30 clinically confirmed cases of myofascial trigger points (MTrPs) in the masseter muscle who were randomly and equally (1:1) assigned to the test (PRP) and control (DN) groups. Both groups were evaluated for pain (visual analog scale [VAS]), range of functional movements, need for pain medication, patient satisfaction (Likert scale), and sleep (VAS) at baseline and 2-week, 1-month, and 3-month follow-ups. VAS pain and Likert score were also obtained at 6-month intervals. RESULTS The use of PRP solution in MTrPs in MPS patients had a better effect on pain and patient satisfaction compared to DN. CONCLUSION PRP appears to be a more effective treatment modality compared to DN in the management of MTrPs in MPS patients.
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Puel AN, da Silva Paes AG, Macedo C, Miranda LS, Graciosa M, Sonza A. Peripheral muscle oxygenation and symptoms of stress in adolescents with and without temporomandibular disorder. Clin Oral Investig 2022; 27:1509-1517. [PMID: 36376615 DOI: 10.1007/s00784-022-04770-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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 11/03/2022] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To compare peripheral muscle oxygenation levels and the prevalence of psychological stress in adolescents with and without temporomandibular disorder (TMD). METHODS A cross-sectional study was performed with adolescents submitted into two groups: those diagnosed with TMD (DG) and control (CG). Muscle oxygenation was measured by near-infrared spectroscopy in the masseter and upper trapezius muscles. Symptoms of stress were assessed by Lipp's Stress Symptom Inventory for Adults or Child Stress Scale. A Student t-test was used for intergroup comparisons and association between categorical variables by chi-square test, phi coefficient of correlation, odds ratio, and two-way ANOVA. RESULTS Fifty-three adolescents were evaluated and a significant reduction was observed in the oxyhemoglobin level in the masseter muscle at rest (p = 0.04) and contraction (p = 0.02). A greater total hemoglobin level was found in the upper trapezius muscle at rest in DG (p = 0.03), with a significant difference in the tissue saturation index during contraction (p = 0.05) intergroup. Individuals in the DG were 4.523 times more likely to exhibit signs and symptoms of stress than in CG. CONCLUSION Adolescents from DG showed reduced masseter oxyhemoglobin values at rest and during contraction and showed more signs and symptoms of stress than healthy controls. In the upper trapezius, DG showed higher values of total circulating hemoglobin, essential for greater blood flow and efficient maximum voluntary contraction. CLINICAL RELEVANCE Changes in tissue oxygenation and stress in adolescents with TMD prompted the earlier treatment of this population to prevent disease progression into adulthood.
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Affiliation(s)
- Alexia Nadine Puel
- Laboratory of Development and Postural Control (LADESCOP), Center of Health Sciences and Sport, Santa Catarina State University (UDESC), Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
- Post-Graduate Program in Physiotherapy, Center of Health Sciences and Sport, Santa Catarina State University, Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
| | - Andreza Garrett da Silva Paes
- Laboratory of Development and Postural Control (LADESCOP), Center of Health Sciences and Sport, Santa Catarina State University (UDESC), Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
- Post-Graduate Program in Human Movement Sciences, Center of Health Sciences and Sport, Santa Catarina State University, Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
| | - Carolina Macedo
- Laboratory of Development and Postural Control (LADESCOP), Center of Health Sciences and Sport, Santa Catarina State University (UDESC), Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
| | - Letícia Souza Miranda
- Laboratory of Development and Postural Control (LADESCOP), Center of Health Sciences and Sport, Santa Catarina State University (UDESC), Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
| | - Maylli Graciosa
- Laboratory of Development and Postural Control (LADESCOP), Center of Health Sciences and Sport, Santa Catarina State University (UDESC), Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
- Post-Graduate Program in Physiotherapy, Center of Health Sciences and Sport, Santa Catarina State University, Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil
| | - Anelise Sonza
- Laboratory of Development and Postural Control (LADESCOP), Center of Health Sciences and Sport, Santa Catarina State University (UDESC), Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil.
- Post-Graduate Program in Physiotherapy, Center of Health Sciences and Sport, Santa Catarina State University, Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil.
- Post-Graduate Program in Human Movement Sciences, Center of Health Sciences and Sport, Santa Catarina State University, Rua Pascoal Simone, 358-Coqueiros, Florianópolis, SC, 88080-350, Brazil.
- Physiotherapy Department, UDESC, Rua Pascoal Simone, 358, Florianópolis, SC, CEP 88080350, Brazil.
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Abstract
Chronic pain associated with temporomandibular disorders (TMDs) may reflect muscle mechanoreceptor afferent barrage and dysregulated sensory processing. This observational study tested for associations between Characteristic Pain Intensity (CPI), physical symptoms (Patient Health Questionnaire-15 [PHQ-15]), and cumulative jaw muscle motor load (mV*s). In accordance with institutional review board oversight and Strengthening the Reporting of Observational Studies in Epidemiology guidelines, adult subjects gave informed consent and were identified via Diagnostic Criteria for TMD (DC-TMD) examination and research protocols. Subjects were assigned to ±Pain groups using DC-TMD criteria for myalgia. CPI scores characterized pain intensity. PHQ-15 scores were surrogate measures of dysregulated sensory processing. Laboratory tests were performed to quantify masseter and temporalis muscle activities (mV) per bite force (N) for each subject. In their natural environments, subjects recorded day- and nighttime electromyography from which cumulative jaw muscle motor loads (mV*s) were determined for activities consistent with bite forces of >1 to ≤2 and >2 to ≤5 N. Data were assessed using univariate analysis of variance, simple effects tests, K-means cluster classification, and 3-dimensional regression analyses. Of 242 individuals screened, 144 enrolled, and 125 with complete data from study protocols, there were 35 females and 15 males for +Pain and 35 females and 40 males for -Pain. Subjects produced 324 daytime and 341 nighttime recordings of average duration 6.9 ± 1.7 and 7.6 ± 1.7 h, respectively. Overall, +Pain compared to -Pain subjects had significantly higher (all P ≤ 0.002) CPI and PHQ-15 scores. Cumulative jaw muscle motor loads showed significant between-subject effects for time, diagnostic group, and sex (all P < 0.003), where motor loads tended to be higher for daytime versus nighttime, +Pain versus -Pain groups, and males versus females. Two clusters were identified, and regression relations showed associations of low-magnitude daytime masseter motor load, PHQ-15, and CPI scores for cluster 1 (n = 105, R2 = 0.44) and cluster 2 (n = 18, R2 = 0.80). Furthermore, these regression relations showed thresholds of motor load and PHQ-15 scores, above which there were nonlinear increases in reported pain.
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Affiliation(s)
- J.C. Nickel
- Department of Orthodontics, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
- Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - Y.M. Gonzalez
- Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - Y. Wu
- Department of Integrative Biomedical and Diagnostic Sciences, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Y. Liu
- Department of Biostatistics and Epidemiology, College of Public Health, East Tennessee State University, Johnson City, TN, USA
| | - H. Liu
- Department of Orthodontics, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - L.R. Iwasaki
- Department of Orthodontics, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
- Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
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Sitnikova V, Kämppi A, Teronen O, Kemppainen P. Effect of Botulinum Toxin Injection on EMG Activity and Bite Force in Masticatory Muscle Disorder: A Randomized Clinical Trial. Toxins (Basel) 2022; 14:toxins14080545. [PMID: 36006207 PMCID: PMC9416064 DOI: 10.3390/toxins14080545] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/28/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
Botulinum toxin type A (BoNT-A) is increasingly used in treating masticatory muscle pain disorder; however, safe doses and reinjection intervals still need to be established. The purpose of this randomized clinical trial was to evaluate the degree and duration of the impairment of masticatory muscle performance. Fifty-seven subjects were randomly divided into two groups: one of which received BoNT-A first (n = 28) while the other received saline first (n = 29), with the cross-over being in week 16, and a total follow-up period of 32 weeks. A total dose of 50 U of BoNT-A was injected in the masseter and temporal muscles bilaterally. Electromyographic (EMG) activity and bite forces were assessed. A significant reduction in EMG activity was observed up to week 18 (p ≤ 001), with total recovery at week 33. A significant reduction in maximum bite force was observed up to week 11 (p ≤ 005), with total recovery at week 25. In conclusion, when treating masticatory muscle pain disorder with 50 U of BoNT-A, a reinjection interval of 33 weeks can be considered safe since the recovery of muscle function occurs by that time.
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Affiliation(s)
- Victoria Sitnikova
- Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, 00280 Helsinki, Finland
| | - Antti Kämppi
- Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, 00280 Helsinki, Finland
- Correspondence: ; Tel.: +358-2941911
| | - Olli Teronen
- Dental Clinic, Private Practice Mehiläinen, 00100 Helsinki, Finland
| | - Pentti Kemppainen
- Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, 00280 Helsinki, Finland
- Oral and Dental Centre, Helsinki University Central Hospital (HUCH), 00290 Helsinki, Finland
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Rohée-Traoré A, Kün-Darbois JD, Boucher S. Masseter muscle pressure injury: First report of a prone position complication in patients with COVID-19. Intensive Crit Care Nurs 2022; 71:103251. [PMID: 35396096 PMCID: PMC8940568 DOI: 10.1016/j.iccn.2022.103251] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 03/16/2022] [Accepted: 03/21/2022] [Indexed: 02/02/2023]
Abstract
We report the case of a 59-year-old, obese woman who underwent prolonged prone position during the medical management of an acute respiratory distress syndrome induced by SARS-CoV-2 infection, complicated by a masseter muscle pressure injury. Such side effect may be underestimate in intensive care units and should be prevent by prophylactic dressings on facial weight-bearing sites. The understanding of facial deep tissue injury is essential to guide clinical detection and management of such a complication in COVID-19 patients.
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Affiliation(s)
- Adèle Rohée-Traoré
- Department of Maxillofacial Surgery, Angers University Hospital, 4 rue Larrey, 49933 ANGERS Cedex, France.
| | - Jean-Daniel Kün-Darbois
- Department of Maxillofacial Surgery, Angers University Hospital, 4 rue Larrey, 49933 ANGERS Cedex, France; Faculty of Medicine, Angers University, 28 rue Roger-Amsler, 49045 ANGERS Cedex 01, France
| | - Sophie Boucher
- Department of ENT and Head and Neck Surgery, Angers University Hospital, 4 rue Larrey, 49933 ANGERS Cedex, France; MitoLab team, MitoVasc Institute, CNRS UMR6015, INSERM U1083, 49933 ANGERS Cedex 09, France
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46
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Park YS, Hong HP, Ryu SR, Lee S, Shin WS. Effects of textured food masticatory performance in older people with different dental conditions. BMC Geriatr 2022; 22:384. [PMID: 35501716 PMCID: PMC9059399 DOI: 10.1186/s12877-022-03064-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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 04/01/2022] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Physiological deterioration (aging, poor dental status, and reduced tongue pressure) makes chewing difficult. This study aimed to investigate the chewing patterns of older people with or without dentures, evaluate the textural and masticatory properties of texture-modified radish Kimchi, and investigate the correlation between dental status and tongue pressure. Additionally, differences in the subjective-objective concordance of texture-modified Kimchi were investigated using the preference test. METHODS This study included 32 Korean women aged between 65 and 85 years. Masticatory behavior was recorded by electromyography, and tongue pressure was measured using the Iowa Oral Performance Instrument. A preference test, with hardness as the relevant textural property, determined the participants' preferences among the test samples (food with a homogeneous structure-radish Kimchi). To assess preference differences, a questionnaire suitable for older people was designed. The preference for cooked radish Kimchi with various blanching times based on overall acceptability and self-reporting of preference was investigated to develop elderly-friendly food. The subjective scores indicated whether the sample (radish Kimchi) was hard or soft based on the chewing ability of the participants. Dental status, muscle activities, and tongue pressure were considered for the food design with optimized texture. The relationship between subject score and mastication properties were examined using multiple regression analysis. RESULTS The number of chews and chewing time increased with hardness, significantly activating the masseter and temporalis muscles. The evaluation of masseter muscle activity, particularly for level-6 radish Kimchi, showed that older people with complete dentures chewed less actively than those with natural teeth (p < 0.05). The older people with natural teeth (18.94 ± 10.27 kPa) exhibited higher tongue pressure than those with complete dentures (10.81 ± 62.93 kPa), and the difference was statistically significant (p < 0.01). Older people preferred food with familiar tastes and textures. An association was found between the subjective hardness score and the objective hardness level. The perceived hardness intensity was linked to the chewing ability of the participant. Denture wearers exhibited a lower chewing ability, and at level 6, they perceived greater hardness of food than those with natural teeth. CONCLUSIONS Developing food with a modified texture can bridge the gap between physiological and psychological aspects of food texture; texture-modified radish Kimchi, with limited blanching time, may be favorable for older people.
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Affiliation(s)
- Young-Sook Park
- Department of Food & Nutrition, College of Human Ecology, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 133-791, South Korea
| | - Han-Pyo Hong
- Biostatistical Consulting and Research Lab, Medical Research Collaborating Center, Hanyang University, Seoul, South Korea
| | - Soo-Rack Ryu
- Biostatistical Consulting and Research Lab, Medical Research Collaborating Center, Hanyang University, Seoul, South Korea
| | - Suyong Lee
- Department of Food Science and Biotechnology, Sejong University, Seoul, South Korea
| | - Weon-Sun Shin
- Department of Food & Nutrition, College of Human Ecology, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 133-791, South Korea.
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Jockusch J, Hahnel S, Sobotta BBAJ, Nitschke I. The Effect of a Masticatory Muscle Training Program on Chewing Efficiency and Bite Force in People with Dementia. Int J Environ Res Public Health 2022; 19:ijerph19073778. [PMID: 35409460 PMCID: PMC8997984 DOI: 10.3390/ijerph19073778] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/08/2022] [Accepted: 03/11/2022] [Indexed: 12/04/2022]
Abstract
Until now, no study has investigated the effects of masticatory muscle training on chewing function in people with dementia. This study aimed to investigate whether physiotherapeutic exercises for the masticatory muscles have an influence on chewing efficiency and bite force in people with dementia. In a clinical trial with stratified randomization subjects were assigned to three groups based on the Mini Mental State Examination (MMSE: group 1—28–30, group 2—25–27, group 3—18–24). Each group was divided into an experimental (ExpG, intervention) and control group (ConG, no intervention). As intervention a Masticatory Muscle Training (MaMuT) (part 1: three physiotherapeutic treatments and daily home exercises, part 2: daily home exercises only) was carried out. Chewing efficiency and bite force were recorded. The MaMuT influenced the masticatory performance regardless of the cognitive state. Bite force increased in ExpG 1 and 2. Without further training, however, the effect disappeared. Chewing efficiency increased in all ExpG. After completion of the training, the ExpG 2 and 3 showed a decrease to initial values. Subjects of ExpG 1 showed a training effect at the final examination, but a tendency toward the initial values was observed. ExpG 3 seemed to benefit most from the physiotherapeutic exercises in terms of improving chewing efficiency by the end of the intervention phase. ExpG 1 showed the greatest gain in bite force. The MaMuT program is a potential method of improving masticatory performance in people with cognitive impairment or dementia when used on a daily basis.
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Affiliation(s)
- Julia Jockusch
- Department of Prosthodontics and Materials Science, Gerodontology Section, University of Leipzig, 04103 Leipzig, Germany; (S.H.); (B.B.A.J.S.); (I.N.)
- University Research Priority Program “Dynamics of Healthy Aging”, University of Zurich, Andreasstrasse 15/Box 2, 8050 Zurich, Switzerland
- Correspondence: or
| | - Sebastian Hahnel
- Department of Prosthodontics and Materials Science, Gerodontology Section, University of Leipzig, 04103 Leipzig, Germany; (S.H.); (B.B.A.J.S.); (I.N.)
| | - Bernhard B. A. J. Sobotta
- Department of Prosthodontics and Materials Science, Gerodontology Section, University of Leipzig, 04103 Leipzig, Germany; (S.H.); (B.B.A.J.S.); (I.N.)
| | - Ina Nitschke
- Department of Prosthodontics and Materials Science, Gerodontology Section, University of Leipzig, 04103 Leipzig, Germany; (S.H.); (B.B.A.J.S.); (I.N.)
- Clinic of General, Special Care and Geriatric Dentistry, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland
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Ekici Ö, Aslan E, Aladağ T, Güzel H, Korkmaz ÖA, Bostancı A, Sadi G, Pektaş MB. Masseter muscle and gingival tissue inflammatory response following treatment with high-fructose corn syrup in rats: Anti-inflammatory and antioxidant effects of kefir. J Food Biochem 2022; 46:e13732. [PMID: 33864286 DOI: 10.1111/jfbc.13732] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 12/17/2022]
Abstract
The aim of the study was to evaluate whether high-fructose corn syrup (HFCS) intake (20% beverages) impacts antioxidative structures and inflammation in the gingival tissue and masseter muscle of rats. Kefir was tested for its potential utility on changes induced by HFCS. Animals were randomly divided into four groups as control, kefir, HFCS, and HFCS plus kefir. HFCS was given as 20% solutions in drinking water while kefir supplementations were given by gastric gavage for 8 weeks. It has been clearly determined that the HFCS diet increased expressions of interleukin (IL)-6, IL-1β, and tumor necrosis factor-α proinflammatory structures via lymphocyte infiltration by suppressing antioxidant enzymes such as catalase, superoxide dismutase, and glutathione peroxidase in both tissues. Kefir improved these undesirable changes in rats fed with HFCS. The results of this current study, the first investigation to examine the effects of kefir on masseter muscle and gingival tissue, may provide new access to the restorative effects of kefir consumption on oral health disorders caused by high fructose in the diet. PRACTICAL APPLICATIONS: In this study, at an early age, the effects of kefir on improving inflammation via antioxidation in the masseter muscle and gingival tissue were investigated for the first time. We showed that kefir feeding ameliorates lymphocyte infiltration on the high-fructose corn syrup (HFCS)-induced masseter muscle and gingival tissue inflammation in rats. The mRNA expressions of inflammatory parameters measured in the study were supported by protein measurements via ELISA or immunohistochemistry. In the present study, kefir may play an important role in the antioxidation and inflammation process on the masseter muscle and gingival tissue against HFCS.
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Affiliation(s)
- Ömer Ekici
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - Esra Aslan
- Department of Histology and Embryology, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - Tuğçe Aladağ
- Department of Histology and Embryology, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - Hilal Güzel
- Department of Anatomy, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - Ömer Adil Korkmaz
- Department of Chemistry, Faculty of Science, Yildiz Technical University, Istanbul, Turkey
| | - Aykut Bostancı
- Department of Biology, K.Ö. Science Faculty, Karamanoglu Mehmetbey University, Karaman, Turkey
| | - Gökhan Sadi
- Department of Biology, K.Ö. Science Faculty, Karamanoglu Mehmetbey University, Karaman, Turkey
| | - Mehmet Bilgehan Pektaş
- Department of Medical Pharmacology, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
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范 莹, 刘 云, 曹 烨, 谢 秋. [Hippocampus is involved in 17β-estradiol exacerbating experimental occlusal inter- ference-induced chronic masseter hyperalgesia in ovariectomized rats]. Beijing Da Xue Xue Bao Yi Xue Ban 2022; 54:40-47. [PMID: 35165466 PMCID: PMC8860665 DOI: 10.19723/j.issn.1671-167x.2022.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To investigate the influence of chronic masseter hyperalgesia induced by 17β-estradiol (E2) and experimental occlusal interference (EOI) on underlying mechanism in hippocampus of ovariectomized (OVX) rats. METHODS In the study, 32 OVX rats were randomly divided into 4 groups (8 rats/group): The control group was OVX group, and 0 μg/d E2 (vehicle) injection was started 7 d after OVX without EOI; in the experimental group (1) OVX + E2 group, 80 μg/d E2 injection was started 7 d after OVX without EOI; in the experimental group (2) OVX + EOI group, vehicle injection was started 7 d after OVX and EOI was applied 17 d after OVX; in the experimental group (3) OVX + E2 + EOI group, 80 μg/d E2 injection was started 7 d after OVX and EOI was applied 17 d after OVX. Bilateral masseter muscle mechanical withdrawal thresholds were measured before OVX, 7 days after OVX (before E2 injection), 17 days after OVX (10 days after E2 injection and before EOI) and 24 days after OVX (7 days after EOI). Immunofluorescence staining was used to reveal phospho-extracellular signal regulated kinase 1/2 (p-ERK1/2)-positive neurons in CA3 of hippocampus. The protein expression of p-ERK1/2 in hippocampus was detected using Western Blot. RESULTS Compared with the control group [left side: (135.3±8.5) g, right side: (135.4±10.8) g], bilateral masseter muscle mechanical withdrawal thresholds of OVX+E2 group [left side: (113.3±5.6) g, right side: (112.5 ± 5.6) g] and OVX+EOI group [left side: (93.3±5.4) g, right side: 90.8±5.5) g] were decreased (P < 0.01). Bilateral masseter muscle mechanical withdrawal thresholds were significantly lower in OVX+E2+EOI group [left side: (81.2±6.2) g, right side: 79.8±7.7) g] than in the control, OVX+E2 and OVX+EOI groups (P < 0.05). The proportion of p-ERK1/2 positive neurons in the CA3 region of the hippocampus was increased in the control, OVX+E2, OVX+EOI and OVX+E2+EOI groups in turn, and the difference between the groups was statistically significant (P < 0.05). p-ERK1/2 protein expression was increased in the control, OVX+E2 and OVX+EOI groups in turn, but the difference was not statistically significant (P>0.05). p-ERK1/2 expression was significantly higher in OVX+E2+EOI group than in the other three groups (P < 0.05). CONCLUSION High concentration of E2 could exacerbated EOI-induced chronic masseter hyperalgesia in ovariectomized rats, and its central mechanism may be related to the upregulation of the phosphorylation of ERK1/2 in hippocampus.
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Affiliation(s)
- 莹莹 范
- />北京大学口腔医学院·口腔医院修复科,国家口腔医学中心,国家口腔疾病临床医学研究中心,口腔数字化医疗技术和材料国家工程实验室,口腔数字医学北京市重点实验室,国家卫生健康委员会口腔医学计算机应用工程技术研究中心,国家药品监督管理局口腔生物材料重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & NHC Research Center of Engineering and Technology for Computerized Dentistry & NMPA Key Laboratory for Dental Materials, Beijing 100081, China
| | - 云 刘
- />北京大学口腔医学院·口腔医院修复科,国家口腔医学中心,国家口腔疾病临床医学研究中心,口腔数字化医疗技术和材料国家工程实验室,口腔数字医学北京市重点实验室,国家卫生健康委员会口腔医学计算机应用工程技术研究中心,国家药品监督管理局口腔生物材料重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & NHC Research Center of Engineering and Technology for Computerized Dentistry & NMPA Key Laboratory for Dental Materials, Beijing 100081, China
| | - 烨 曹
- />北京大学口腔医学院·口腔医院修复科,国家口腔医学中心,国家口腔疾病临床医学研究中心,口腔数字化医疗技术和材料国家工程实验室,口腔数字医学北京市重点实验室,国家卫生健康委员会口腔医学计算机应用工程技术研究中心,国家药品监督管理局口腔生物材料重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & NHC Research Center of Engineering and Technology for Computerized Dentistry & NMPA Key Laboratory for Dental Materials, Beijing 100081, China
| | - 秋菲 谢
- />北京大学口腔医学院·口腔医院修复科,国家口腔医学中心,国家口腔疾病临床医学研究中心,口腔数字化医疗技术和材料国家工程实验室,口腔数字医学北京市重点实验室,国家卫生健康委员会口腔医学计算机应用工程技术研究中心,国家药品监督管理局口腔生物材料重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & NHC Research Center of Engineering and Technology for Computerized Dentistry & NMPA Key Laboratory for Dental Materials, Beijing 100081, China
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Ueno Y, Higashiyama M, Haque T, Masuda Y, Katagiri A, Toyoda H, Uzawa N, Yoshida A, Kato T. Motor representation of rhythmic jaw movements in the amygdala of guinea pigs. Arch Oral Biol 2022; 135:105362. [PMID: 35121262 DOI: 10.1016/j.archoralbio.2022.105362] [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: 07/07/2021] [Revised: 12/24/2021] [Accepted: 01/26/2022] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The areas of the amygdala contributing to rhythmic jaw movements and the movement patterns induced remain unknown. Therefore, the present study investigated the areas of the amygdala contributing to rhythmic jaw movements using repetitive electrical microstimulation techniques. DESIGN Experiments were performed on head-restrained guinea pigs under ketamine-xylazine anesthesia. EMG activities in the masseter and digastric muscles and jaw movements were recorded. Short- and long-train electrical microstimulations of the amygdala were performed and the patterns of jaw movements induced were analyzed quantitatively. RESULT The short-train stimulation induced short-latency EMG responses in the masseter and/or digastric muscles. The stimulation sites inducing short-latency EMG responses were distributed within the ventral part of the amygdala, which covered the medial, basal, and cortical nuclei. The long-train stimulation induced tonic jaw opening and two types of rhythmic jaw movements: those with or without lateral jaw shifts, which were characterized by a larger jaw gape and ipsilateral jaw excursion, respectively. Rhythmic jaw movements with lateral jaw shifts were characterized by overlapping masseter and digastric EMG activities. However, rhythmic patterns did not differ between the two types of rhythmic jaw movements. The stimulation sites that induced rhythmic jaw movements were more localized to the cortical nucleus. CONCLUSIONS The present results suggest that the ventral part of the amygdala is involved in the induction of rhythmic jaw movements in guinea pigs. The putative roles of the limbic system in the genesis of functional (e.g., chewing) and non-functional (e.g., bruxism) rhythmic oromotor movements warrant further study.
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Affiliation(s)
- Yoshio Ueno
- Department of Oral and Maxillofacial Surgery Ⅱ, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan; Department of Oral Physiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan; Department of Oral Anatomy and Neurobiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Makoto Higashiyama
- Department of Oral Physiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan; Department of Oral Anatomy and Neurobiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Tahsinul Haque
- Department of Oral Anatomy and Neurobiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan; Department of Preventive Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh 13314, Saudi Arabia
| | - Yuji Masuda
- Division of Oral Maxillofacial Biology, Institute for Oral Science, Matsumoto Dental University, Nagano 399-0781, Japan
| | - Ayano Katagiri
- Department of Oral Physiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Hiroki Toyoda
- Department of Oral Physiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Narikazu Uzawa
- Department of Oral and Maxillofacial Surgery Ⅱ, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Atsushi Yoshida
- Department of Oral Anatomy and Neurobiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Takafumi Kato
- Department of Oral Physiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
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