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Regalo IH, Palinkas M, Gonçalves LMN, de Vasconcelos PB, Cappella A, Solazzo R, Ferreira CLP, Dolci C, Regalo SCH, Sforza C, Siessere S. Impact of obesity on the structures and functions of the stomatognathic system: A morphofunctional approach. Arch Oral Biol 2024; 159:105877. [PMID: 38183935 DOI: 10.1016/j.archoralbio.2023.105877] [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: 08/30/2023] [Revised: 11/27/2023] [Accepted: 12/24/2023] [Indexed: 01/08/2024]
Abstract
OBJECTIVE The prevalence of obesity is increasing significantly worldwide, raising great concern among health professionals. This observational study evaluated the electromyographic activity and thickness of the masseter and temporalis muscles, in addition to the maximum molar bite force, in obese and eutrophic subjects. METHODS Sixty subjects were divided into three groups: I (7-12 years), II (13-20 years), III (21-40 years) and sex: with 10 men and 10 women for each group. Electromyographic recordings of the masticatory muscles were obtained during mandibular tasks. The masticatory muscles thicknesses were obtained at rest and during dental clenching. The maximum molar bite forces were measured on the right and left sides. The difference in outcome measures between the groups and sex was analyzed using Mann-Whitney U test (p < 0.05) and analysis of covariance (ANCOVA). RESULTS Electromyographic activity in the masseter and temporal muscles consistently displayed lower levels in obese subjects of both sexes across all three age groups during mandibular tasks. Additionally, greater thickness of the masticatory muscles was observed in obese subjects of both sexes across all three age groups. Obese women in Group II displayed higher values of molar bite force, both on the right and left sides, compared to eutrophic women. On the other hand, women in Group III exhibited higher values of molar bite force on the right side in comparison to eutrophic women. CONCLUSIONS This study underscores the potential impact of obesity on the morphofunctional aspects of the stomatognathic system in subjects aged 7 to 40 years.
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Affiliation(s)
- Isabela Hallak Regalo
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil
| | - Marcelo Palinkas
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil; National Institute and Technology - Translational Medicine (INCT.TM), Brazil.
| | | | | | - Annalisa Cappella
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy; U.O. Laboratory of Applied Morphology, IRCCS Policlinico San Donato, San Donato Milanese, Italy
| | - Riccardo Solazzo
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| | | | - Claudia Dolci
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| | - Simone Cecilio Hallak Regalo
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil; National Institute and Technology - Translational Medicine (INCT.TM), Brazil
| | - Chiarella Sforza
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| | - Selma Siessere
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil; National Institute and Technology - Translational Medicine (INCT.TM), Brazil
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Ge J, Bo L, Zhang D, Wei X, Li J, Zhao J, Yue S, Xie Q, Shen P, Ma Z, Fang B, Yang C. Association between bilateral condylar resorption and reduced volumes of the craniofacial skeleton and masticatory muscles in adult patients: A retrospective study. Heliyon 2024; 10:e25037. [PMID: 38333825 PMCID: PMC10850897 DOI: 10.1016/j.heliyon.2024.e25037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 02/10/2024] Open
Abstract
Objectives This retrospective cohort study aimed to analyze volumes of craniomaxillofacial bone and masticatory muscles of young adults with bilateral idiopathic condylar resorption. Methods This was a retrospective cohort study of 84 adults with bilateral idiopathic condylar resorption (BCR) and 48 adults with normal temporal-mandibular joint (TMJ) matched for age and sex (mean age, 23.2 ± 3.6 years). The volumes of craniomaxillofacial bone and masticatory muscles, as well as intercondylar angle were measured. Unpaired t-tests and Pearson correlation tests were applied to analyze the data. Multivariable linear regression models were used to estimate the association between bilateral condylar volume and volumes of craniomaxillofacial bone and masticatory muscles adjusted for age, sex, and disc status. Results Compared to the control group, the BCR group displayed significant decreased volumes of craniomaxillofacial bone (p < 0.001), craniomaxillofacial bone without mandible (p < 0.001), mandible (p < 0.001), mandible without mandibular condylar process (p < 0.001), bilateral masseter muscle (p < 0.001) and bilateral temporalis muscle (p < 0.001), as well as the intercondylar angle (p < 0.001). These variables were significantly correlated to the volume of mandibular condylar process (0.5< r < 0.8; p < 0.001). By linear regression analyses, significant associations were found for the bilateral condylar volume with craniomaxillofacial bone volume and mandible bone volume. Conclusions Young adults with BCR displayed smaller volumes of craniomaxillofacial skeleton and masticatory muscles, and smaller intercondylar angle than the normal patients. The craniofacial musculoskeletal volume and intercondylar angle are associated with mandibular condylar process volume.
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Affiliation(s)
- Jing Ge
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lingtong Bo
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dahe Zhang
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiang Wei
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiayi Li
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiong Zhao
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shijing Yue
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qianyang Xie
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Pei Shen
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhigui Ma
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bing Fang
- Department of Orthodontics, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chi Yang
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Ginatempo F, Loi N, Rothwell JC, Deriu F. Sensorimotor integration in cranial muscles tested by short- and long-latency afferent inhibition. Clin Neurophysiol 2024; 157:15-24. [PMID: 38016262 DOI: 10.1016/j.clinph.2023.10.017] [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: 06/14/2023] [Revised: 10/19/2023] [Accepted: 10/27/2023] [Indexed: 11/30/2023]
Abstract
OBJECTIVE To compressively investigate sensorimotor integration in the cranial-cervical muscles in healthy adults. METHODS Short- (SAI) and long-latency afferent (LAI) inhibition were probed in the anterior digastric (AD), the depressor anguli oris (DAO) and upper trapezius (UT) muscles. A transcranial magnetic stimulation pulse over primary motor cortex was preceded by peripheral stimulation delivered to the trigeminal, facial and accessory nerves using interstimulus intervals of 15-25 ms and 100-200 ms for SAI and LAI respectively. RESULTS In the AD, both SAI and LAI were detected following trigeminal nerve stimulation, but not following facial nerve stimulation. In the DAO, SAI was observed only following trigeminal nerve stimulation, while LAI depended only on facial nerve stimulation, only at an intensity suprathreshold for the compound motor action potential (cMAP). In the UT we could only detect LAI following accessory nerve stimulation at an intensity suprathreshold for a cMAP. CONCLUSIONS The results suggest that integration of sensory inputs with motor output is profoundly influenced by the type of sensory afferent involved and by the functional role played by the target muscle. SIGNIFICANCE Data indicate the importance of taking into account the sensory receptors involved as well as the function of the target muscle when studying sensorimotor integration, both in physiological and neurological conditions.
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Affiliation(s)
- Francesca Ginatempo
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro 43/b, 07100 Sassari, Italy
| | - Nicola Loi
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro 43/b, 07100 Sassari, Italy
| | - John C Rothwell
- Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, UK
| | - Franca Deriu
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro 43/b, 07100 Sassari, Italy; Unit of Endocrinology, Nutritional and Metabolic Disorders, AOU Sassari, Sassari, Italy.
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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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Murakami M, Hirano H, Iwasaki M, Shirobe M, Edahiro A, Obuchi S, Kawai H, Fujiwara Y, Ihara K, Motokawa K. Development of a multiple masticatory function model based on the evaluation of sarcopenia: A cross-sectional survey of the Otassha study. Arch Oral Biol 2023; 155:105803. [PMID: 37738909 DOI: 10.1016/j.archoralbio.2023.105803] [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: 04/30/2023] [Revised: 09/05/2023] [Accepted: 09/08/2023] [Indexed: 09/24/2023]
Abstract
OBJECTIVE The masticatory function is intricately linked to several factors like natural teeth count, occlusion, masticatory muscles, and tongue coordination. This study's goal was to formulate a comprehensive masticatory function model, considering sarcopenia's conceptual structure, and subsequently validate its measurement efficacy. DESIGN The study encompassed 753 participants (59.1 % women; mean age: 73.0 ± 5.1 years) from an urban community. The model amalgamated masseter muscle mass, occlusal force, and mixing ability. Based on the Asian Working Group for Sarcopenia 2019 classification, participants were categorized into a multiple masticatory dysfunction (MMD) or severe MMD (S-MMD) group. Logistic regression analysis gauged the model's validity, using serum albumin levels and self-reported chewing difficulties as dependent variables. RESULTS Of the total, 61 (8.1 %) participants exhibited MMD, while 24 (3.2 %) had S-MMD. S-MMD was correlated with low serum albumin levels (odds ratio: 3.62; 95 % confidence interval: 1.07-12.29) and heightened self-reported chewing difficulties (odds ratio: 2.82; 95 % confidence interval: 1.09-7.28). CONCLUSIONS Our multiple masticatory function model offers a straightforward approach for assessing MMD. Furthermore, the study establishes a link between S-MMD, nutritional vulnerability, and self-reported chewing challenges, thus affirming the model's credibility.
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Affiliation(s)
- Masaharu Murakami
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan; National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu, Aichi 474-8511, Japan
| | - Hirohiko Hirano
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
| | - Masanori Iwasaki
- Hokkaido University School of Dental Medicine Graduate School of Dental Medicine, Kita13 Nishi7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Maki Shirobe
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
| | - Ayako Edahiro
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
| | - Shuichi Obuchi
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
| | - Hisashi Kawai
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
| | - Yoshinori Fujiwara
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
| | - Kazushige Ihara
- Hirosaki University Graduate School of Medicine, 5 Zaifu, Hirosaki, Aomori 036-8562, Japan
| | - Keiko Motokawa
- Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan.
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Sánchez-Ayala A, Sánchez-Ayala A, Kolodzejezyk RC, Urban VM, Lagravère MÓ, Campanha NH. A three-dimensional method to calculate mechanical advantage in mandibular function : Intra- and interexaminer reliability study. J Orofac Orthop 2023; 84:321-339. [PMID: 35254453 DOI: 10.1007/s00056-022-00378-7] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 01/16/2022] [Indexed: 11/29/2022]
Abstract
PURPOSE Masticatory muscles are physically affected by several skeletal features. The muscle performance depends on muscle size, intrinsic strength, fiber direction, moment arm, and neuromuscular control. To date, for the masticatory apparatus, only a two-dimensional cephalometric method for assessing the mechanical advantage, which is a measure for the ratio of the output force to the input force in a system, is available. This study determined the reliability and errors of a three-dimensional (3D) mechanical advantage calculation for the masticatory system. METHODS Using cone-beam computed tomography images from teenage patients undergoing orthodontic treatments, 36 craniofacial landmarks were identified, and the moment arms for seven muscles and their load moment arms (biomechanical variables) were determined. The 3D mechanical advantage for each muscle was calculated. This procedure was repeated by three examiners. Reliability was verified using the intraclass correlation coefficient (ICC) and the errors by calculating the absolute differences, variance estimator and coefficient of variation (CV). RESULTS Landmark coordinates demonstrated excellent intra- and interexaminer reliability (ICC 0.998-1.000; p < 0.0001). Intraexaminer data showed errors < 1.5 mm. Unsatisfactory interexaminer errors ranged from 1.51-5.83 mm. All biomechanical variables presented excellent intraexaminer reliability (ICC 0.919-1.000, p < 0.0001; CV < 7%). Interexaminer results were almost excellent, but with lower values (ICC 0.750-1.000, p < 0.0001; CV < 10%). However, the muscle moment arm and 3D mechanical advantage of the lateral pterygoid muscles had ICCs < 0.500 (p < 0.05) and CV < 30%. Intra- and interexaminer errors were ≤ 0.01 and ≤ 0.05, respectively. CONCLUSIONS Both landmarks and biomechanical variables showed high reliability and acceptable errors. The proposed method is viable for the 3D mechanical advantage measure.
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Affiliation(s)
- Alejandro Sánchez-Ayala
- Department of Dentistry, University of Ponta Grossa, Avenida General Carlos Cavalcanti n° 4748, Bloco M, Sala 64A, 84030-900, Ponta Grossa, Paraná, Brazil
| | - Alfonso Sánchez-Ayala
- Department of Dentistry, University of Ponta Grossa, Avenida General Carlos Cavalcanti n° 4748, Bloco M, Sala 64A, 84030-900, Ponta Grossa, Paraná, Brazil.
| | - Rafaela Cristina Kolodzejezyk
- Department of Dentistry, University of Ponta Grossa, Avenida General Carlos Cavalcanti n° 4748, Bloco M, Sala 64A, 84030-900, Ponta Grossa, Paraná, Brazil
| | - Vanessa Migliorini Urban
- Department of Dentistry, University of Ponta Grossa, Avenida General Carlos Cavalcanti n° 4748, Bloco M, Sala 64A, 84030-900, Ponta Grossa, Paraná, Brazil
| | - Manuel Óscar Lagravère
- Department of Dentistry, University of Ponta Grossa, Avenida General Carlos Cavalcanti n° 4748, Bloco M, Sala 64A, 84030-900, Ponta Grossa, Paraná, Brazil
| | - Nara Hellen Campanha
- Orthodontic Graduate Program, University of Alberta, 116 St & 85 Ave, T6G 2R3, Edmonton, Alberta, Canada
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Katagiri W, Saito D, Maruyama S, Ike M, Nisiyama H, Hayashi T, Tanuma JI, Kobayashi T. Masticatory muscle tendon-aponeurosis hyperplasia that was initially misdiagnosed for polymyositis: a case report and review of the literature. Maxillofac Plast Reconstr Surg 2023; 45:18. [PMID: 37126217 PMCID: PMC10151447 DOI: 10.1186/s40902-023-00386-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/26/2023] [Indexed: 05/02/2023] Open
Abstract
BACKGROUND Masticatory muscle tendon-aponeurosis hyperplasia (MMTAH) is a relatively newly identified clinical condition that manifests as trismus with a square-shaped mandible. Herein, we report a case of MMATH that was initially misdiagnosed for polymyositis due to trismus and simultaneous lower limb pain, with literature review. CASE PRESENTATION A 30-year-old woman had a history of lower limb pain after exertion for 2 years. Initial physical examination had been performed at the Department of General Medicine in our hospital. There was also redness in the hands and fingers. Although polymyositis was suspected, it was denied. The patient visited our department for right maxillary wisdom tooth extraction. Clinical examination revealed that the patient had a square-shaped mandible. The maximal mouth opening was 22 mm. There was no temporomandibular joint pain at the time of opening. Furthermore, there was awareness of clenching while working. Panoramic radiography revealed developed square mandibular angles with flattened condyles. Computed tomography showed enlarged masseter muscles with high-density areas around the anterior and lateral fascia. Magnetic resonance imaging also showed thickened tendons and aponeuroses on the anterior surface and inside bilateral masseter muscles. Finally, the patient was diagnosed with MMTAH. Bilateral aponeurectomy of the masseter muscles with coronoidectomy and masseter muscle myotomy was performed under general anesthesia. The maximum opening during surgery was 48 mm. Mouth opening training was started on day 3 after surgery. Histopathological examination of the surgical specimen showed that the muscle fibers were enlarged to 60 μm. Immunohistochemistry testing for calcineurin, which was associated with muscle hypertrophy due to overload in some case reports, showed positive results. Twelve months after surgery, the mouth self-opening and forced opening were over 35 mm and 44 mm, respectively. CONCLUSIONS Herein, we report a case of MMATH. Lower limb pain due to prolonged standing at work and overload due to clenching were considered risk factors for symptoms onset of MMATH.
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Affiliation(s)
- Wataru Katagiri
- Department of Oral and Maxillofacial Surgery, Gifu University Graduate School of Medicine, Yanagido, Gifu, 501-1194, Japan.
| | - Daisuke Saito
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Faculty of Dentistry & Graduate School of Medical and Dental Science, Niigata University, 2-5274 Gakkocho-dori, Chuo-Ku, Niigata, 951-8514, Japan
| | - Satoshi Maruyama
- Oral Pathology Section, Department of Surgical Pathology, Niigata University Hospital, 1-754 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8520, Japan
| | - Makiko Ike
- Division of Oral and Maxillofacial Radiology, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274 Gakkocho-Dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Hideyoshi Nisiyama
- Division of Oral and Maxillofacial Radiology, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274 Gakkocho-Dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Takafumi Hayashi
- Division of Oral and Maxillofacial Radiology, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274 Gakkocho-Dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Jun-Ichi Tanuma
- Division of Oral Pathology, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274 Gakkocho-dori, Chuo-Ku, Niigata, 951-8514, Japan
| | - Tadaharu Kobayashi
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Faculty of Dentistry & Graduate School of Medical and Dental Science, Niigata University, 2-5274 Gakkocho-dori, Chuo-Ku, Niigata, 951-8514, Japan
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Abstract
Temporomandibular joints (TMJ) are one of the most complex joints. Each one is located on one side of the face, and are composed of mandibular fossa, joint tubercle, and condylar process of mandible, separated by an articular disk. To these structures are attached ligaments and muscles, which will provide stability and movement. When TMJs work properly, jaw movements can be performed without pain or discomfort. It is important to mention that the complex formed by both TMJs will confront the maxillary with the mandibular bone and therefore will be related to the occlusion, linking these structures during growth and development.
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Affiliation(s)
- Veronica Iturriaga
- Department of Integral Adult Care Dentistry, Universidad de La Frontera. Francisco Salazar Avenue 01145, Temuco, Chile.
| | - Thomas Bornhardt
- Department of Integral Adult Care Dentistry, Universidad de La Frontera. Francisco Salazar Avenue 01145, Temuco, Chile
| | - Nicol Velasquez
- Temporomandibular Disorder, Orofacial Pain Program, Universidad de La Frontera. Francisco Salazar Avenue 01145, Temuco, Chile
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Yao Y, Cai B, Fan S, Yang HX, Zhang YX, Xu LL. The association between forward head posture and masticatory muscle pressure pain thresholds in patients with temporomandibular joint dissorders: a cross-sectional observational study. Clin Oral Investig 2023; 27:353-60. [PMID: 36241923 DOI: 10.1007/s00784-022-04739-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 10/02/2022] [Indexed: 02/01/2023]
Abstract
OBJECTIVES Forward head posture (FHP) is common in patients with temporomandibular joint disorders (TMDs); however, whether it contributes to TMD symptoms remains unclear. The aim of this study was to investigate the association between (1) FHP and masticatory muscle pressure pain thresholds (PPTs) and (2) neck muscle and masticatory muscle PPTs. MATERIALS AND METHODS A total of 145 patients diagnosed with TMD were recruited between December 2020 and April 2021. Data regarding FHP and neck and masticatory muscle PPTs were collected. FHP was characterized by the craniocervical angle (CVA) measured between the horizontal line through C7 and the line between the tragus of the ear and C7. Patients were divided into either the FHP group (CVA ≤ 51°) or the non-FHP group. Differences in the masseter and temporalis muscle PPTs between the two groups were analyzed using the Mann-Whitney U test. The correlation between the CVA, neck, and masticatory muscle PPTs in all patients was determined by Spearman's correlation analysis. RESULTS There were 70 patients in the FHP group and 75 patients in the non-FHP group. No significant difference in masseter and temporalis muscle PPTs was found between the two groups (p > 0.05). No correlation was found between FHP and masticatory muscle PPTs (p > 0.05). A significant association was found between the neck muscle and masticatory muscle PPTs (p < 0.05). The C5-C6 pillar and masticatory PPTs were either moderately (r = 0.435, masseter muscle) or strongly (r = 0.608, temporalis muscle) correlated, while the correlation between the trapezius and masticatory muscles was moderate (r = 0.378, masseter muscle and r = 0.461, temporalis muscle). CONCLUSION FHP was not directly associated with masticatory muscle PPTs. Masticatory muscle PPTs were strongly or moderately associated with neck muscle PPTs. Therefore, the presence of neck pain, not the degree of FHP, in patients with TMD is of significance. CLINICAL RELEVANCE In TMD treatment, we should pay attention to and actively relieve neck pain.
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Gali S. Case-based Virtual Seminars on Masticatory Muscle Disorders during the COVID-19 Pandemic. Med Sci Educ 2022; 32:953-957. [PMID: 35966165 PMCID: PMC9362388 DOI: 10.1007/s40670-022-01600-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 07/15/2022] [Indexed: 06/15/2023]
Abstract
Due to the significant influence of COVID-19 pandemic on dental education in the recent past, interactive educational strategies were explored to engage students. Case-based seminars (CBS) were proposed on masticatory muscle disorders (MMDs) for post-graduate dental students through integration of pathophysiology with its etiology, diagnosis, and management. Effectiveness of CBS was done at Kirkpatrick's level 1 and level 2 hierarchy with a pre-test and a post-test. CBS enhanced learning outcomes of post-graduate students in understanding MMDs. Thus, this report could serve as a useful model for other dental schools in prosthodontic post-graduate curriculum.
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Affiliation(s)
- Sivaranjani Gali
- Department of Prosthodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, MSRIT POST, 560054 Bangalore, Karnataka India
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11
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de Almeida ANS, de Souza Ferreira SL, Balata PMM, da Cunha DA, Pernambuco L, da Silva HJ. Thermography in complementary assessments of head and neck muscles: A scoping review. J Oral Rehabil 2022; 49:1188-1196. [PMID: 36135945 DOI: 10.1111/joor.13374] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 07/10/2022] [Accepted: 09/13/2022] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Infrared thermography has the potential to help assess human head and neck muscles, as thermal variation measurements due to muscle imbalance can contribute to the evaluation and therapeutic follow-up of various clinical conditions in the field of health. OBJECTIVE This study investigated, with a scoping review, the use of infrared thermography in complementary assessments of human head and neck muscles to determine the extent of research on the topic, what methodologies are used in thermal assessment and thermographic analysis, what regions are assessed, and what results are expected in thermography. METHODS LILACS, MEDLINE, SciELO, and Web of Science were the databases searched to identify articles published on the topic, with no restriction of language or time of publication. Descriptive, analytical, and experimental observational studies on the assessment of the human head and neck muscle surface temperature with infrared thermography were included. Case studies, case series, methodological accuracy, literature review, animal studies, studies that assessed patients with head and neck cancer, and studies that did not assess head and neck muscle temperature with thermography were excluded. The articles were analyzed with a protocol developed by the authors, with data on author, year, country, type of study, sample characterization, muscles assessed, outcomes investigated, thermal assessment methodology, thermographic analysis methodology, and thermography measurements. RESULTS This review identified and analyzed 27 articles. The studies assessed thermal distribution in normal individuals and those with pathologies related to hyper- and hypofunctional head and neck muscle conditions for diagnosis or therapeutic follow-up. The masseter, temporal, digastric, anterior cervical region, orbicularis oris, frontalis, buccinator, suprahyoid, trapezius, sternocleidomastoid, and levator scapulae muscles were assessed. Quantitative analyses with area selection tool predominated, considering absolute temperatures and temperature differences. The studies investigated temperature and its relationship with myogenic pain, quantitative assessment of muscle parameters, and blood flow velocity. The mean temperature ranged from 32.97 °C (±2.21) to 34.90 °C, and hyper-radiant and/or asymmetric regions were observed in hyperfunctional conditions and normal subjects after muscle activation. CONCLUSION Thermography is used in complementary assessments of head and neck muscles, identifying hyper-radiant regions and thermal asymmetry related to muscle tension and activation state. Papers are limited to specific clinical conditions and few muscle groups, besides having great methodological variability.
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Affiliation(s)
| | | | | | | | - Leandro Pernambuco
- Department of Speech Therapy, Federal University of Paraíba, João Pessoa, Brazil
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12
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Lan KW, Jiang LL, Yan Y. Comparative study of surface electromyography of masticatory muscles in patients with different types of bruxism. World J Clin Cases 2022; 10:6876-6889. [PMID: 36051132 PMCID: PMC9297420 DOI: 10.12998/wjcc.v10.i20.6876] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/22/2022] [Accepted: 05/22/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Bruxism is a rhythmic masticatory muscle activity that occurs involuntarily in a non-physiologically functional state. There is a lack of research classifying the functional status of masticatory muscles in patients with different mandibular movement types (centric clenching or eccentric grinding) of bruxism.
AIM To assess the differences of the masticatory muscle activity in patients with different types of bruxism.
METHODS A total of 21 subjects with centric bruxism (CB) and 21 subjects with eccentric bruxism (ECB) were screened from college students according to a questionnaire and their tooth wear features. Sixteen subjects with no bruxism were also recruited. The surface electromyography (EMG) signals of the temporalis anterior (TA) and superficial masseter muscle (MM) were measured in different mandibular positions and during the chewing task. The EMG amplitude and chewing cycle duration parameters were then analyzed.
RESULTS The CB group showed fewer muscle maximal motor units, with the MM being more pronounced, a higher proportion of muscle contractions to be recruited for the same load of chewing activity, and a longer chewing cycle. The ECB group showed more TA maximal motor units and higher MM activity on the non-working side in unilateral chewing.
CONCLUSION CB mainly affects the MM, and patients with CB show reduced masticatory muscle contraction efficiency and chewing cycle efficiency. ECB mainly affects the TA, and patients with ECB show enhanced contraction of non-functional lateral muscle bundles.
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Affiliation(s)
- Kai-Wen Lan
- Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Guangzhou 510080, Guangdong Province, China
| | - Liu-Lin Jiang
- Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Guangzhou 510080, Guangdong Province, China
| | - Ying Yan
- Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Guangzhou 510080, Guangdong Province, China
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13
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Wasinwasukul P, Nalamliang N, Pairatchawan N, Thongudomporn U. Effects of anterior bite planes fabricated from acrylic resin and thermoplastic material on masticatory muscle responses and maximum bite force in children with a deep bite: a 6-month randomized controlled trial. J Oral Rehabil 2022; 49:980-992. [PMID: 35730261 DOI: 10.1111/joor.13351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 06/05/2022] [Accepted: 06/16/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Anterior bite planes are bite-raising appliances used for deep bite correction. However, muscle responses to anterior bite planes of different hardnesses may vary. OBJECTIVES To prospectively evaluate masticatory muscle activity, muscle balance, and maximum bite force (MBF) responses to anterior bite planes fabricated from acrylic resin (ABP) or bi-laminate thermoplastic (TBP) over 6 months in children with a deep bite. METHODS Sixty-six children were randomly assigned to the ABP, TBP, or untreated control groups. Masticatory muscle activity, activity index (AC), and percentage overlapping coefficient (POC) were assessed by surface electromyography; MBF, using a custom-made bite force sensor. Data were collected before, immediately after appliance insertion, and after 2 weeks and 1, 3, and 6 months of treatment. Within- and between-group differences were analyzed using one-way ANOVA/Kruskal-Wallis and Mann Whitney U-tests (α=0.05); Friedman's tests were used to assess within-group differences over time (α=0.08). RESULTS At rest, no dependent variables changed throughout the study. At maximum clenching, masticatory muscle activity immediately dropped significantly but returned to baseline values and was equal to the control group at 1-3 months. The ABP group had significantly lower masseter activity and AC than the TBP group after insertion. Neither POC nor MBF were significantly different within or between groups. CONCLUSION Masticatory muscle activity reduced after anterior bite plane insertion but returned to baseline after 1-3 months. Masseter activity decreased significantly more in the ABP group than TBP group. Neither appliance significantly affected POC or MBF.
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Affiliation(s)
- Passakorn Wasinwasukul
- Orthodontic section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Napat Nalamliang
- Department of Occlusion, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nalin Pairatchawan
- Orthodontic section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Udom Thongudomporn
- Orthodontic section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
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Bettiol NB, Regalo SCH, Cecilio FA, Gonçalves LMN, de Vasconcelos PB, Lopes CGG, Andrade LM, Regalo IH, Siéssere S, Palinkas M. Intervertebral Disc Degeneration: Functional Analysis of Bite Force and Masseter and Temporal Muscles Thickness. Prague Med Rep 2022; 123:101-112. [PMID: 35507943 DOI: 10.14712/23362936.2022.11] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Intervertebral disc degeneration is a pathological condition associated with the intervertebral disc and is related to functional alterations in the human body. This study aimed to evaluate the maximum molar bite force and masseter and temporal muscles thickness in individuals with intervertebral disc degeneration. Thirty-two individuals were divided into two groups: those with degeneration of intervertebral discs (n=16) and those without degeneration (n=16). The maximum molar bite force (on the right and left sides) was measured using a dynamometer. Masseter and temporal muscle thickness during mandibular task rest and dental clenching in maximum voluntary contraction were analysed using ultrasound. Significant differences in the left molar bite force (p=0.04) were observed between the groups (Student's t-test, p<0.05). The intervertebral disc degeneration group had a lower maximum molar bite force. No significant differences in muscle thickness were observed between the masseter and temporal muscles in either group. However, based on clinical observations, the group with intervertebral disc degeneration presented less masseter muscle thickness and greater temporal muscle thickness in both mandibular tasks. Degenerative disease of the intervertebral discs promoted morphofunctional changes in the stomatognathic system, especially in maximum molar bite force and masticatory muscle thickness. This study provides insight into the interaction between spinal pathology and the stomatognathic system, which is important for healthcare professionals who treat patients with functional degeneration.
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Affiliation(s)
- Nicole Barbosa Bettiol
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Simone Cecilio Hallak Regalo
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,Department of Neuroscience and Behavioral Sciences, Faculty of Medicine of Ribeirão Preto, University of São Paulo; National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil
| | - Flávia Argentato Cecilio
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | | | - Paulo Batista de Vasconcelos
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Claire Genoveze Gauch Lopes
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Lilian Mendes Andrade
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Isabela Hallak Regalo
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Selma Siéssere
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,Department of Neuroscience and Behavioral Sciences, Faculty of Medicine of Ribeirão Preto, University of São Paulo; National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil
| | - Marcelo Palinkas
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil. .,Department of Neuroscience and Behavioral Sciences, Faculty of Medicine of Ribeirão Preto, University of São Paulo; National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil.
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15
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Osen E. Marinus of Alexandria: Galen's anatomical forefather, or: How do you solve a problem like Marinus? Stud Hist Philos Sci 2022; 92:224-238. [PMID: 34649708 DOI: 10.1016/j.shpsa.2020.10.001] [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] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 10/08/2020] [Indexed: 06/13/2023]
Abstract
Marinus of Alexandria is-with the exception of Hippocrates-the most commended ancient anatomist in the Galenic corpus, and the man to whom Galen attributes the resurgence of anatomy itself. Working in the first century C.E., he dramatically influenced the course of the history of medicine in two main ways: firstly, he made great strides in anatomical discovery, expounded in an extensive anatomical textbook that attracted much contemporary praise; secondly, he produced considerable expertise around the ancient world through teaching and didactic enterprise. Marinus generated significant renown and respect from these endeavours, which greatly benefitted future generations of medical scholars, including the infamous Galen himself, who even openly admits as such. However, despite Marinus' enormous influence on Galenic anatomy, a body of scientific knowledge that reigned supreme and untouchable for more than a millennium, he today fails to command a level of recognition befitting his epochal achievements. This article explores the factors contributing to his underrated reputation amidst incredibly mixed scholarly opinion, in contrast to the available evidence of the discoveries and innovations of a man who proved so inspirational to the most famous of ancient authors.
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Affiliation(s)
- Elana Osen
- Faculty of Classics, University of Cambridge, Sidgwick Avenue, Cambridge, CB3 9DA, UK; Mid Essex Hospital Services NHS Trust, Court Road, Broomfield, Chelmsford, Essex, CM1 7ET, UK.
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16
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Akita K, Fukino K. The significance and classification of the layered structures of the human masseter and temporalis. Ann Anat 2022; 242:151907. [PMID: 35183707 DOI: 10.1016/j.aanat.2022.151907] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 01/29/2022] [Accepted: 01/30/2022] [Indexed: 11/25/2022]
Abstract
A report published in the Annals of Anatomy recently stated that the coronoid part of the masseter was a newly described layer. However, there have been numerous discussions regarding the layered structures in the masseter and temporalis. In this review, we show that the muscle bundle stated as a newly described layer could be similar to the zygomaticomandibularis that was previously reported. Knowledge of various muscle bundles with different fiber directions is essential to understanding the stabilization and closing functions of the jaw. Therefore, the layered structure of the masseter and temporalis should be considered more for clinical and functional applications.
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Affiliation(s)
- Keiichi Akita
- Department of Clinical Anatomy, Tokyo Medical and Dental University (TMDU), Tokyo Japan.
| | - Keiko Fukino
- Department of Orofacial Development and Function, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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17
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Alshammari A, Almotairy N, Kumar A, Grigoriadis A. Effect of malocclusion on jaw motor function and chewing in children: a systematic review. Clin Oral Investig 2022. [PMID: 34985577 DOI: 10.1007/s00784-021-04356-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 12/29/2021] [Indexed: 12/04/2022]
Abstract
Objective To investigate the effects of dental/skeletal malocclusion and orthodontic treatment on four main objective parameters of chewing and jaw function (maximum occlusal bite force [MOBF], masticatory muscle electromyography [EMG], jaw kinematics, and chewing efficiency/performance) in healthy children. Materials and methods Systematic searches were conducted in MEDLINE (OVID), Embase, and the Web of Science Core Collection. Studies that examined the four parameters in healthy children with malocclusions were included. The quality of studies and overall evidence were assessed using the Joanna Briggs Institute and GRADE tools, respectively. Results The searches identified 8192 studies; 57 were finally included. The quality of included studies was high in nine studies, moderate in twenty-three studies, and low in twenty-five studies. During the primary dentition, children with malocclusions showed similar MOBF and lower chewing efficiency compared to control subjects. During mixed/permanent dentition, children with malocclusion showed lower MOBF and EMG activity and chewing efficiency compared to control subjects. The jaw kinematics of children with unilateral posterior crossbite showed a larger jaw opening angle and a higher frequency of reverse chewing cycles compared to crossbite-free children. There was a low to moderate level of evidence on the effects of orthodontic treatment in restoring normal jaw function. Conclusions Based on the limitations of the studies included, it is not entirely possible to either support or deny the influence of dental/skeletal malocclusion traits on MOBF, EMG, jaw kinematics, and masticatory performance in healthy children. Furthermore, well-designed longitudinal studies may be needed to determine whether orthodontic treatments can improve chewing function in general. Clinical relevance Comprehensive orthodontic treatment, which includes evaluation and restoration of function, may or may not mitigate the effects of malocclusion and restore normal chewing function. Supplementary Information The online version contains supplementary material available at 10.1007/s00784-021-04356-y.
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18
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Fernández Rubio EM, Radlanski RJ. Hypothesis for the lack of a muscular antagonist to the lateral pterygoid. Ann Anat 2022; 239:151841. [PMID: 34718130 DOI: 10.1016/j.aanat.2021.151841] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 09/30/2021] [Accepted: 10/04/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND During physiological function of the temporomandibular joint, we have to rely only on elastic structures (in particular the bilaminar zone) for repositioning of the articular disc. A real muscle, however, would be functionally more reasonable. In patients, a decrease of this elasticity is possibly one of the reasons for temporomandibular joint malfunctions, which affect between 16% and 36% of the population. METHOD This study assesses the morphogenesis of the murine (Mus musculus) temporomandibular joint with particular regard to the masticatory muscles, to throw light on this topic. To that end, a collection of 11 murine heads ranging from prenatal stages E13.25 to E20 was used and early postnatal stages P0 to P4, which were prepared as histological sections (thickness 8-10 µm) and stained conventionally in order to examine them with light microscopy. Next, the temporomandibular joint and selected surrounding structures, along with the masticatory muscles, were threedimensionally reconstructed using analySIS® software. Subsequently, specific morphometric analyses were performed. RESULTS AND CONCLUSIONS The evaluation of the results led to the following conclusions.
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Affiliation(s)
- Esther María Fernández Rubio
- Campus Benjamin Franklin at Freie Universität Berlin Center for Dental and Craniofacial Sciences Dept. of Craniofacial Developmental Biology, Assmannshauser Str. 4-6 14197 Berlin, Germany.
| | - R J Radlanski
- Campus Benjamin Franklin at Freie Universität Berlin Center for Dental and Craniofacial Sciences Dept. of Craniofacial Developmental Biology, Assmannshauser Str. 4-6 14197 Berlin, Germany.
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Mezey SE, Müller-Gerbl M, Toranelli M, Türp JC. The human masseter muscle revisited: First description of its coronoid part. Ann Anat 2021; 240:151879. [PMID: 34863910 DOI: 10.1016/j.aanat.2021.151879] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 11/12/2021] [Accepted: 11/25/2021] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The masseter muscle is considered to be bilayered, consisting of a superficial and a deep part. However, a few historical texts mention the possible existence of a third layer as well, but they are extremely inconsistent as to its position. Here we performed an anatomical study to clarify the presence and morphological characteristics of a distinct third layer of the masseter muscle. MATERIALS AND METHODS We dissected 12 formaldehyde-fixed human cadaver heads, analysed CTs of 16 fresh cadavers, evaluated MR data from one living subject and examined histological sections using methyl methacrylate embedding of one formaldehyde-preserved head. RESULTS An anatomically distinct, deep third layer of the masseter muscle was consistently demonstrated, running from the medial surface of the zygomatic process of the temporal bone to the root and posterior margin of the coronoid process. Ours is the first detailed description of this part of the masseter muscle. CONCLUSIONS To facilitate discussion of this newly described part of the masseter, we recommend the name M. masseter pars coronoidea (coronoid part of the masseter) as a further reference. The arrangement of its muscle fibers suggest it being involved in stabilising the mandible by elevating and retracting the coronoid process.
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Affiliation(s)
- Szilvia E Mezey
- Anatomical Institute, Department of Biomedicine, University of Basel, Pestalozzistrasse 20, 4056 Basel, Switzerland.
| | - Magdalena Müller-Gerbl
- Anatomical Institute, Department of Biomedicine, University of Basel, Pestalozzistrasse 20, 4056 Basel, Switzerland.
| | - Mireille Toranelli
- Anatomical Institute, Department of Biomedicine, University of Basel, Pestalozzistrasse 20, 4056 Basel, Switzerland.
| | - Jens Christoph Türp
- University Center for Dental Medicine Basel UZB, Department of Oral Health, University of Basel, Mattenstrasse 40, 4058 Basel, Switzerland.
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Gomes GGC, Palinkas M, da Silva GP, Gonçalves CR, Lopes RFT, Verri ED, Fabrin SCV, Fioco EM, Siéssere S, Regalo SCH. Bite Force, Thickness, and Thermographic Patterns of Masticatory Muscles Post-Hemorrhagic Stroke. J Stroke Cerebrovasc Dis 2021; 31:106173. [PMID: 34700235 DOI: 10.1016/j.jstrokecerebrovasdis.2021.106173] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/16/2021] [Accepted: 10/10/2021] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE Stroke is a neurological deficit of cerebrovascular origin, considered a 21st-century epidemic that causes functional changes in the human body. This study aimed to evaluate the stomatognathic system of patients after hemorrhagic stroke through the bite force, thickness, and skin temperature in the region of the masseter and temporalis muscles. MATERIAL AND METHODS Twenty-four subjects were divided into groups: post-hemorrhagic stroke; with right side of the affected body (n = 12) and without the neurological disorder (n = 12). Maximum molar bite force was verified using a digital dynamometer. Muscle thickness was measured using ultrasound images obtained at rest and during maximal voluntary contraction of the masseter and temporalis muscles. Thermographic camera was used to record the thermographic patterns of the masseter and temporalis muscles. Data were subjected to Student's t-test (P < .05). RESULTS The maximum molar bite force showed significant differences in the right (P = .04) and left (P = .03) sides, with a reduction in force in the post-hemorrhagic stroke group on the affected and unaffected sides. There was a significant difference (P < .05) in the thickness of the left temporal muscle at mandibular rest (P = .01) between groups. The post-hemorrhagic stroke group clinically presented greater muscle thickness in almost 100% of the muscles evaluated in both clinical conditions. There were no significant differences in skin temperature in the masseter and temporal muscles between the groups. CONCLUSIONS Our results suggest functional changes in the stomatognathic system of subjects after a hemorrhagic stroke, especially concerning molar bite force and masticatory muscle thickness in the temporal muscle (unaffected side).
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Affiliation(s)
- Guilherme Gallo Costa Gomes
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Marcelo Palinkas
- Department of Basic and Oral Biology, National Institute and Technology - Translational Medicine (INCT.TM), School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n, Bairro, São Paulo, SP 14040-904, Brazil.
| | - Gabriel Pádua da Silva
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Camila Roza Gonçalves
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Robson Felipe Tosta Lopes
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Edson Donizetti Verri
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Saulo Cesar Vallin Fabrin
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Evandro Marianetti Fioco
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Selma Siéssere
- Department of Basic and Oral Biology, National Institute and Technology - Translational Medicine (INCT.TM), School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n, Bairro, São Paulo, SP 14040-904, Brazil.
| | - Simone Cecilio Hallak Regalo
- Department of Basic and Oral Biology, National Institute and Technology - Translational Medicine (INCT.TM), School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n, Bairro, São Paulo, SP 14040-904, Brazil.
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Iwasaki M, Hirano H, Motokawa K, Shirobe M, Edahiro A, Ohara Y, Kawai H, Kojima M, Obuchi S, Murayama H, Fujiwara Y, Ihara K, Shinkai S, Kitamura A. Interrelationships among whole-body skeletal muscle mass, masseter muscle mass, oral function, and dentition status in older Japanese adults. BMC Geriatr 2021; 21:582. [PMID: 34670508 PMCID: PMC8529791 DOI: 10.1186/s12877-021-02552-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 10/07/2021] [Indexed: 12/15/2022] Open
Abstract
Background Generalized loss of skeletal muscle mass (SMM) may modulate or otherwise affect the loss of masseter muscle mass and be responsible for low masseter muscle performance and strength (i.e., low oral function). Moreover, dentition status can affect oral function independent of the muscle state. This cross-sectional study aimed to simultaneously investigate the relationships among whole-body SMM, masseter muscle mass, oral function (masseter muscle performance and strength), and dentition status in 1349 Japanese adults (mean age = 73.6 years). Methods We determined the estimated masseter muscle mass (e-MMM) based on morphological measurements of the masseter muscle. Masseter muscle performance was assessed via masticatory performance evaluation scores using gum, and strength was assessed as the maximal occlusal force. Dentition status was assessed as the number of functional teeth. SMM was measured by bioelectrical impedance analysis. Structural equation modeling stratified by sex was employed to investigate associations among SMM, e-MMM, gum score, occlusal force, and number of functional teeth. Results The direct path from SMM to e-MMM was statistically significant, as was the direct path from e-MMM to oral function (gum score and maximum occlusal force) for both sexes. We additionally confirmed that SMM indirectly affected gum score and maximum occlusal force via e-MMM (men; standardized coefficient [95% CI] = 3.64 [1.31 to 5.96] for maximum occlusal force and 0.01 [0.01 to 0.02] for gum score, women; 2.01 [0.38 to 3.81] for maximum occlusal force and 0.01 [0.002 to 0.01] for gum score). The number of functional teeth had direct effects on e-MMM, gum score, and maximum occlusal force. Conclusions Low SMM was significantly indirectly associated with poor oral function through a low masseter muscle mass, and dentition status was independently associated with oral function.
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Affiliation(s)
- Masanori Iwasaki
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan.
| | - Hirohiko Hirano
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Keiko Motokawa
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Maki Shirobe
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Ayako Edahiro
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Yuki Ohara
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Hisashi Kawai
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Motonaga Kojima
- Department of Physical Therapy, University of Tokyo Health Sciences, 4-11, Ochiai, Tama City, Tokyo, 206-0033, Japan
| | - Shuichi Obuchi
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Hiroshi Murayama
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Yoshinori Fujiwara
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Kazushige Ihara
- Department of Social Medicine, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki City, Aomori, 036-8562, Japan
| | - Shoji Shinkai
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan.,School of Nutritional Sciences, Kagawa Nutrition University, 3-9-21 Chiyoda Sakado, Saitama, 350-0288, Japan
| | - Akihiko Kitamura
- Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo, 173-0015, Japan
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22
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Pyo CY, Kim TH, Kim DH. Association between masticatory muscle activity and oral conditions in young female college students. Anat Cell Biol 2021; 54:479-488. [PMID: 34552039 PMCID: PMC8693132 DOI: 10.5115/acb.21.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/12/2021] [Accepted: 07/26/2021] [Indexed: 11/27/2022] Open
Abstract
The purpose of this study was to determine the characteristics of masticatory muscle activity and various oral condition factors, and to analyze their associations in order to improve the prevention and diagnosis of masticatory muscle-related diseases. This study included 30 Korean females (mean age of 20 years, age range of 19-21 years). Participants were instructed to complete a self-written questionnaire on factors that may affect their muscle activity. Surface electromyography was used to measure the activity of the masseter and temporalis muscles. We also observed the buccal mucosa ridge, tongue indentation, tooth cracks and fractures, and mandibular tori in the oral cavity. Spearman correlation analysis and the nonparametric Mann-Whitney U test were applied to the data. When subjects had temporomandibular disorder, the right temporalis muscle exhibited significantly lower activity (P<0.05). Those who had received orthodontic treatment within the previous 2 years showed significantly lower activity of the left masseter muscle (P<0.05). Those who had a left buccal mucosa ridge exhibited lower activity of the left masseter muscle and higher activity of the right temporalis muscle compared with those without such a ridge (P<0.05). Participants with no tongue indentation showed significantly higher activity in the left masseter muscle (P<0.05). These results indicate that there are relationships between masticatory muscle activity and various factors related to the oral condition.
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Affiliation(s)
| | - Tae-Hoon Kim
- Department of Occupational Therapy, Division of Health Sciences, Dongseo University, Busan, Korea
| | - Da-Hye Kim
- Department of Dental Hygiene, Division of Health Sciences, Dongseo University, Busan, Korea
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23
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da Silva AB, Torres RP, Lourenço MH, Cabral C, Reis R, Cunha-Branco J, Gonçalves MJ. An atypical case of focal myositis. Rheumatology (Oxford) 2021; 61:e158-e159. [PMID: 34286336 DOI: 10.1093/rheumatology/keab574] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/09/2021] [Indexed: 11/12/2022] Open
Affiliation(s)
- Ana Bento da Silva
- Department of Rheumatology, Centro Hospitalar de Lisboa Ocidental EPE, Lisboa, Portugal.,Centro de Estudos de Doenças Crónicas (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal
| | - Rita Pinheiro Torres
- Department of Rheumatology, Centro Hospitalar de Lisboa Ocidental EPE, Lisboa, Portugal.,Centro de Estudos de Doenças Crónicas (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal
| | - Maria Helena Lourenço
- Department of Rheumatology, Centro Hospitalar de Lisboa Ocidental EPE, Lisboa, Portugal.,Centro de Estudos de Doenças Crónicas (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal
| | - Catarina Cabral
- Department of Internal Medicine, Centro Hospitalar de Lisboa Ocidental EPE, Lisboa, Portugal
| | - Rita Reis
- Department of Internal Medicine, Centro Hospitalar de Lisboa Ocidental EPE, Lisboa, Portugal
| | - Jaime Cunha-Branco
- Department of Rheumatology, Centro Hospitalar de Lisboa Ocidental EPE, Lisboa, Portugal.,Centro de Estudos de Doenças Crónicas (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal.,Comprehensive Health Research Center - CHRC, Centro de Estudos de Doenças Crónicas (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal
| | - Maria João Gonçalves
- Department of Rheumatology, Centro Hospitalar de Lisboa Ocidental EPE, Lisboa, Portugal.,Centro de Estudos de Doenças Crónicas (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal.,Comprehensive Health Research Center - CHRC, Centro de Estudos de Doenças Crónicas (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal
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24
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Nalamliang N, Sumonsiri P, Thongudomporn U. Masticatory performance is influenced by masticatory muscle activity balance and the cumulative occlusal contact area. Arch Oral Biol 2021; 126:105113. [PMID: 33826961 DOI: 10.1016/j.archoralbio.2021.105113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/16/2021] [Accepted: 03/25/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To investigate the influence of masticatory muscle activity balance, occlusal contact area balance and the area of occlusal contact on masticatory performance in healthy dentate adults. DESIGN This cross-sectional study included ninety-three healthy subjects with complete dentition. Surface electromyography (sEMG) was used to record bilateral anterior temporalis activity and masseter muscle activity during maximum voluntary clenching and while chewing a test food. Seven levels of area of occlusal contact and near contact (ACNC) were registered and calculated cumulatively. The percentage overlapping coefficients were calculated for both muscle groups at maximum voluntary clenching and chewing and all levels of ACNC. Masticatory performance was measured by determining the median particle size of frankfurter sausage after 15 chewing cycles. Pearson's correlation and stepwise multiple linear regression analyses were used to assess the correlations between variables and the influence of the variables on masticatory performance, respectively, at the 0.05 level of significance. RESULTS Muscle balance during clenching and chewing, all near contact levels of cumulative ACNC and ACNC balance correlated negatively with median particle size (P < 0.05). The model based on stepwise multiple linear regression analysis showed muscle balance during clenching and cumulative ACNC at < 250 μm influenced median particle size. CONCLUSION Masticatory muscle activity balance during maximum voluntary clenching and the cumulative amount of near contact area were associated with masticatory performance, suggesting the amount of occlusal contact area-as well the balance of masticatory muscle activity-play a role in masticatory performance.
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Affiliation(s)
- Napat Nalamliang
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | | | - Udom Thongudomporn
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
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25
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Asquini G, Rushton A, Pitance L, Heneghan N, Falla D. The effectiveness of manual therapy applied to craniomandibular structures in the treatment of temporomandibular disorders: protocol for a systematic review. Syst Rev 2021; 10:70. [PMID: 33685496 PMCID: PMC7941703 DOI: 10.1186/s13643-021-01623-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 02/26/2021] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The term temporomandibular disorder (TMD) includes disorders of the temporomandibular joints (TMJ), masticatory muscles and adjacent tissues. Several studies have examined the effectiveness of manual therapy (MT) for TMDs by evaluating changes in pain and maximum mouth opening (MMO). Nevertheless, the effectiveness of MT exclusively applied to the craniomandibular structures (craniomandibular manual therapy (CMMT)) on pain and TMJ range of motion remains unclear. This review aims to evaluate the effectiveness of CMMT on pain and TMJ range of motion in people with TMDs. METHODS This protocol is reported in line with the preferred reporting items for systematic reviews and meta-analysis protocols (PRISMA-P). Databases including MEDLINE, Embase, CINAHL, ZETOC, Web of Science, SCOPUS, PEDro, PubMed, Cochrane Library and Best Evidence, EBM reviews-Cochrane Central Register of Controlled Trials, Index to Chiropractic Literature ChiroAccess and Google Scholar will be searched from inception as well as key journals and grey literature. Randomised controlled trials involving adults with TMD that compare the effect of any type of CMMT (e.g. mobilisation) on pain and range of motion with a placebo intervention, controlled care intervention or other types of treatment will be included. Two reviewers will independently screen articles for inclusion, extract data, assess risk of bias (revised Cochrane risk of bias tool) for included studies and evaluate overall quality of evidence (Grading of Recommendations Assessment, Development and Evaluation). A meta-analysis will be conducted if possible. If not, a narrative synthesis will be conducted reporting the effectiveness of CMMT according to disorder type (TMJ disorders, masticatory muscle disorders and mixed disorders). DISCUSSION In this review, the effectiveness of MT applied to craniomandibular structures for the treatment of TMD will be evaluated. Results will be submitted for publication in a peer-reviewed journal and presented at conferences. We expect our findings will facilitate treatment planning for manual therapists managing patients with TMD and provide future clinical research implications. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42019160213.
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Affiliation(s)
- Giacomo Asquini
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Alison Rushton
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Laurent Pitance
- Institute of Experimental and Clinical Research, Health Sciences division, Neuro-Musculo-Skeletal-Lab (NMSK), Université Catholique de Louvain, Brussels, Belgium
| | - Nicola Heneghan
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Deborah Falla
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK.
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26
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Botzenhart UU, Keil C, Tsagkari E, Zeidler-Rentzsch I, Gredes T, Gedrange T. Influence of botulinum toxin A on craniofacial morphology after injection into the right masseter muscle of dystrophin deficient (mdx-) mice. Ann Anat 2021; 236:151715. [PMID: 33675949 DOI: 10.1016/j.aanat.2021.151715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 01/22/2021] [Accepted: 01/29/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Severe craniofacial and dental abnormalities, typical for patients with progressive Duchenne muscular dystrophy (DMD), are an exellcent demonstration of Melvin L. Moss "functional matrix theory", highlighting the influence of muscle tissue on craniofacial growth and morphology. However, the currently best approved animal model for investigation of this interplay is the mdx-mouse, which offers only a limited time window for research, due to the ability of muscle regeneration, in contrast to the human course of the disease. The aim of this study was to evaluate craniofacial morphology after BTX-A induced muscle paralysis in C57Bl- and mdx-mice, to prove the suitability of BTX-A intervention to inhibit muscle regeneration in mdx-mice and thus, mimicking the human course of the DMD disease. METHODS Paralysis of the right masseter muscle was induced in 100 days old C57Bl- and mdx-mice by a single specific intramuscular BTX-A injection. Mice skulls were obtained at 21 days and 42 days after BTX-A injection and 3D radiological evaluation was performed in order to measure various craniofacial dimensions in the sagittal, transversal and vertical plane. Statstical analysis were performed using SigmaStat®Version 3.5. In case of normal distribution, unpaired t-test and otherwise the Mann-Whitney-U test was applied. A statistical significance was given in case of p ≤ 0.05. RESULTS In contrast to C57Bl-mice, in mdx-mice, three weeks after BTX-A treatment a significant decrease of skull dimensions was noted in most of the measurements followed by a significant increase at the second investigation period. CONCLUSIONS BTX-A can induce changes in craniofacial morphology and presumably partially inhibit muscle regeneration in mdx-mice, but cannot completely intensify craniofacial effects elicited by dystrophy. Further research is necessary in order to fully understand muscle-bone interplay after BTX-A injection into dystrophic muscles.
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Affiliation(s)
| | - Christiane Keil
- Medical Faculty Carl Gustav Carus Campus, TU Dresden, 01307, Dresden, Germany; Department of Orthodontics, Carl Gustav Carus Campus, TU Dresden, 01307, Dresden, Germany
| | - Eirini Tsagkari
- Department of Orthodontics, Faculty of Dentistry School of Health Sciences, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Ines Zeidler-Rentzsch
- Department of Otorhinolaryngology, Head and Neck Surgery, Carl Gustav Carus Campus, TU Dresden, 01307, Dresden, Germany
| | - Tomasz Gredes
- Medical Faculty Carl Gustav Carus Campus, TU Dresden, 01307, Dresden, Germany; Department of Orthodontics, Carl Gustav Carus Campus, TU Dresden, 01307, Dresden, Germany
| | - Tomasz Gedrange
- Medical Faculty Carl Gustav Carus Campus, TU Dresden, 01307, Dresden, Germany
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27
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Balaban E, Yılmaz O, Tımarcıoğlu G, Bahran U, Candirli C, Koşucu P. Preoperative and postoperative assessment of temporal and masseter muscle size with magnetic resonance imaging in patients undergoing unilateral temporomandibular joint surgery. J Craniomaxillofac Surg 2021; 49:705-710. [PMID: 33707133 DOI: 10.1016/j.jcms.2021.02.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 11/15/2020] [Accepted: 02/15/2021] [Indexed: 11/29/2022] Open
Abstract
The aim of this study was to assess any change between the preoperative and postoperative sizes of temporal and masseter muscles with magnetic resonance imaging (MRI) in patients undergoing unilateral temporomandibular joint surgery. This study was designed and implemented retrospectively. For clinical evaluation, a visual analog scale (VAS) and maximum mouth opening (MMO) were used. In order to make a preoperative diagnosis and perform a 6-month control, muscle size was measured in millimeters (mm) on T1 axial sections in MRI. Statistical analyses were performed using the SPSS 23.0 software package. Numeric variables were compared between two dependent groups using the Wilcoxon signed rank test. Statistical significance was set at p < 0.05. Twelve patients who underwent unilateral discectomy plus dermis-fat grafting, with classical preauricular inverse L incision, were included in the study, and data for eleven female patients were evaluated. The difference in size between the operated and non-operated sides was found to be statistically insignificant at the preoperative stage for both masseter muscle (operated side mM: 13.264 ± 1.822 mm; non-operated side mM: 13.264 ± 2.315 mm; pM = 0.929) and temporal muscle (operated side mT: 20.345 ± 2.609 mm; non-operated side mT: 20.582 ± 2.366 mm; pT = 0.594). There was a significant size reduction in the masseter muscle on the operated side in the postoperative period (preop mM: 13.264 ± 1.822 mm; postop mM: 12.036 ± 1.728 mm; pM = 0.018). Although there was also a size reduction in the operated side of the temporal muscle in the postoperative period, that difference did not reach statistical significance (preop mT: 20.345 ± 2.609 mm; postop mT: 19.445 ± 1.603 mm; pT = 0.182). On the non-operated side, there were no significant postoperative changes in the sizes of either the masseter muscle (preop mM: 13.264 ± 2.315 mm; postop mM: 12.682 ± 2.059 mm; pM = 0.248) or the temporal muscle (preop mT: 20.582 ± 2.366; postop mT: 19.891 ± 3.487 mm; pT = 0.625). Considering the study findings as a whole, a size reduction was observed in the operated side of the masseter muscle after TMJ surgery. The etiology of this change may be surgical trauma to the temporal and masseter muscles, skeletal alteration resulting from condylar change secondary to discectomy, and patients restraining themselves from application of maximum bite force as a result of a self-protection mechanism due to postoperative pain.
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Affiliation(s)
- Emre Balaban
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Recep Tayyip Erdogan University, Central Rize, Rize, Turkey.
| | - Onur Yılmaz
- Department of Maxillofacial Surgery, Faculty of Dentistry, Karadeniz Technical University, Akcaabat, Trabzon, Turkey.
| | - Göksel Tımarcıoğlu
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Health Sciences, Uskudar, Istanbul, Turkey.
| | - Utku Bahran
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Health Sciences, Uskudar, Istanbul, Turkey.
| | - Celal Candirli
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Health Sciences, Uskudar, Istanbul, Turkey.
| | - Polat Koşucu
- Department of Radiology, Faculty of Medicine, Karadeniz Technical University, Akcaabat, Trabzon, Turkey.
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28
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Zhang HY, Duan J, Wang J, Xie MJ, Liu Q, Liu JQ, Yang HX, Wang MQ. Masseter response to long-term experimentally induced anterior crossbite in Sprague-Dawley rats. Arch Oral Biol 2020; 122:104985. [PMID: 33340921 DOI: 10.1016/j.archoralbio.2020.104985] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 10/30/2020] [Accepted: 11/01/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To detect the long-term response to unilateral anterior crossbite (UAC) in masticatory muscles and in molecular biomarkers of peripheral blood leukocytes. DESIGN Fifty-six six-week-old Sprague-Dawley rats were used. The gene-fold changes in peripheral blood leukocytes were detected by the microarray analysis to compare the rats that received 20-week UAC treatment with age-matched controls (n = 4). Muscle atrophy-related gene Fbxo32 was selected based on the data of the microarray analysis verified by using real-time PCR. The remaining 36 rats were randomly separated in the UAC and control groups at 12 and 20 weeks (n = 12). The protein expression of Fbxo32 and the muscle injury and myogenesis-related markers, αB-crystallin and desmin, were detected in the masseter and lateral pterygoid muscles by western blot assay. RESULTS In the 20-week UAC group, the masseter muscle weight was lower than that in the age-matched control group, and the expression level of Fbxo32 gene in peripheral blood leukocytes was increased according to the microarray analysis confirmed by real-time PCR detection. The increased protein expression levels of Fbxo32 were detected in the masseter in the 20-week UAC group, and the protein expression levels of desmin and αB-crystallin were decreased at this time point. No similar changes were detected in the lateral pterygoid muscle. CONCLUSIONS Masseter atrophy is induced by long-term stimulation of UAC. The increased expression of the Fbxo32 gene in peripheral blood leukocytes may be a candidate biological marker of masseter atrophy.
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Affiliation(s)
- Hong-Yun Zhang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, 145 Changlexi Road, Xi'an, 710032, PR China
| | - Jing Duan
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, 145 Changlexi Road, Xi'an, 710032, PR China
| | - Jing Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, the Fourth Military Medical University, Xi'an, PR China
| | - Mian-Jiao Xie
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, 145 Changlexi Road, Xi'an, 710032, PR China
| | - Qian Liu
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, 145 Changlexi Road, Xi'an, 710032, PR China
| | - Jin-Qiang Liu
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, 145 Changlexi Road, Xi'an, 710032, PR China; School of Stomatology, the Jiamusi University, Jiamusi, PR China
| | - Hong-Xu Yang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, 145 Changlexi Road, Xi'an, 710032, PR China
| | - Mei-Qing Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, 145 Changlexi Road, Xi'an, 710032, PR China.
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29
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Riddle PC, Nickel JC, Liu Y, Gonzalez YM, Gallo LM, Conley RS, Dunford R, Liu H, Iwasaki LR. Mechanobehavior and mandibular ramus length in different facial phenotypes. Angle Orthod 2020; 90:866-872. [PMID: 33378519 DOI: 10.2319/032420-217.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 03/01/2020] [Accepted: 07/01/2020] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES To test the hypotheses that mechanobehavior scores (MBS) were correlated with mandibular ramus lengths (Co-Go) and differed between facial phenotypes. MATERIALS AND METHODS Subjects gave informed consent to participate. Co-Go (mm), mandibular plane angles (SN-GoGn, °), and three-dimensional anatomy were derived from cephalometric radiography or cone beam computed tomography. Temporomandibular joint (TMJ) energy densities (ED) (mJ/mm3) were measured using dynamic stereometry and duty factors (DF) (%) were measured from electromyography, to calculate MBS (= ED2 × DF,) for each TMJ. Polynomial regressions, K-means cluster analysis, and analysis of variance (ANOVA) with Tukey post-hoc tests were employed. RESULTS Fifty females and 23 males produced replete data. Polynomial regressions showed MBS were correlated with Co-Go (females, R2 = 0.57; males, R2 = 0.81). Cluster analysis identified three groups (P < .001). Dolichofacial subjects, with shorter normalized Co-Go, clustered into two subgroups with low and high MBS compared to brachyfacial subjects with longer Co-Go. SN-GoGn was significantly larger (P < .03) in the dolichofacial subgroups combined (33.0 ± 5.9°) compared to the brachyfacial group (29.8 ± 5.5°). CONCLUSIONS MBS correlated with Co-Go within sexes and differed significantly between brachyfacial and dolichofacial subjects.
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30
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Branco T, Oliveira LF, Palinkas M, de Vasconcelos PB, Oliveira MC, Simões BP, Regalo IH, Siéssere S, Regalo SCH. Autologous Hematopoietic Stem Cell Therapy of the Subjects with Systemic Sclerosis: Electromyographic Results of the Masticatory Muscles. Prague Med Rep 2020; 121:163-171. [PMID: 33030145 DOI: 10.14712/23362936.2020.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Musculoskeletal system impairment is a major cause of functional alterations in subjects with systemic sclerosis. Autologous hematopoietic stem cell therapy (AHSCT) may have an important role in the treatment functional of systemic sclerosis patients. The aim of this pilot study was to assess whether AHSCT interferes with the electromyographic activity of the masseter and temporalis muscles of subjects with systemic sclerosis. Before transplantation, seven subjects with systemic sclerosis (mean age [± SD], 40.1 ± 9.6 years) underwent electromyographic analysis of the masseter and temporalis muscles in mandibular tasks at rest, right and left laterality, protrusion and maximum voluntary contraction. Two months after AHSCT, the subjects re-evaluated using the same methods. Data were analyzed using the repeated-measure test, with p<0.05 considered to be statistically significant. Two months after AHSCT, there was reduction in normalized electromyographic activity in the dental clenching in maximal voluntary contraction, with significant differences, for the left temporal muscle (p=0.04). AHSCT in subjects with systemic sclerosis promotes alterations in stomatognathic system function, especially those related to electromyographic activity of masticatory muscles.
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Affiliation(s)
- Thamyres Branco
- School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | | | - Marcelo Palinkas
- Faculty Anhanguera, Ribeirão Preto, São Paulo, Brazil. .,National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil. .,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.
| | | | - Maria Carolina Oliveira
- Bone Marrow Transplantation Unit, Hospital das Clínicas, School of Medicine, University of São Paulo, Ribeirão Preto, Brazil.,School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Belinda Pinto Simões
- Bone Marrow Transplantation Unit, Hospital das Clínicas, School of Medicine, University of São Paulo, Ribeirão Preto, Brazil.,School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Selma Siéssere
- National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Simone Cecilio Hallak Regalo
- National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
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31
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Di Giacomo P, Ferrato G, Serritella E, Polimeni A, Di Paolo C. Muscular pattern in patients with temporomandibular joint disc displacement with reduction: an electromyographical assessment. Clin Ter 2020; 171:e414-e420. [PMID: 32901785 DOI: 10.7417/ct.2020.2251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Surface Electromyography of masticatory muscles (sEMG) is used as a tool to support diagnosis and treatment of Temporomandibular disorders (TMDs). The study aimed at examining jaw muscles pattern in individuals with temporomandibular joint disc displacement with reduction (TMJ/DDR). This sort of subjects was supposed to have a different muscular pattern compared to the control group. MATERIALS AND METHODS Sixty-four women with unilateral TMJ/DDR and forty TMD-free women underwent a sEMG assessment of masticatory muscles. Descriptive statistics were performed. Student T-Test assessed differences between the two groups. Statistical significance was set at ρ < 0.05. RESULT The t-test showed statistically significant results only in BAR and SMI scores (ρ value < 0,0001). The other measurements did not differ between the two groups. BAR index values of all healthy subjects were within the reference range. Almost the entire TMJ/DDR group had BAR index out of reference range and anteriorly placed. CONCLUSION Women with TMJ/DDR showed an altered recruitment of the jaw muscles, with significant difference between the activity of the couple of temporalis and the one of masseters, compared to the control group. A lower chewing efficiency was found in the DDR group compared to the control one.
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Affiliation(s)
- P Di Giacomo
- DDS, Ph.D Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome
| | - G Ferrato
- DDS, Ph.D Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome
| | - E Serritella
- DDS, Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome
| | - A Polimeni
- MD, DDS, Full Professor Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome, Rome, Italy
| | - C Di Paolo
- MD, DDS, Full Professor Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome, Italy
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Souza GLN, Serra-Negra JM, Prado IM, Aguiar SO, Hoffmam GDFEB, Pordeus IA, Auad SM, Abreu LG. Association of facial type with possible bruxism and its related clinical features in adolescents: A cross-sectional study. Int Orthod 2020; 18:758-769. [PMID: 32888883 DOI: 10.1016/j.ortho.2020.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 11/15/2022]
Abstract
OBJECTIVES The assessment of bruxism and its clinical characteristics is acknowledged in literature. This study aimed to evaluate the association of adolescents' facial patterns with bruxism and its related clinical features in the form of signs and symptoms. MATERIALS AND METHODS Four hundred and three adolescents answered a questionnaire evaluating sleep bruxism (SB) and awake bruxism (AB). Parents/caregivers answered a questionnaire evaluating the adolescents' sleep features (drooling on the pillow, snoring). Adolescents' facial (dolichofacial/brachyfacial/mesofacial) and clinical features (pain in masseter/temporal muscle, indentations marks on the tongue, linea alba, tooth attrition, mouth's maximum opening and masseter electrical activity) were evaluated. Multinomial regression was performed. Odds ratio (OR) and confidence intervals (CI) were provided. RESULTS Brachyfacial adolescents were less likely to present possible AB compared to mesofacials (OR=0.46, CI=0.21-0.98). Brachyfacial adolescents were more likely to present pain in the temporal muscle (OR=6.59, CI=2.18-19.87) and a higher number of posterior teeth with attrition (OR=1.25, CI=1.02-1.57) compared to mesofacials. Dolichofacial adolescents were more likely of not presenting pain in the masseter muscle (OR=2.23, CI=1.03-4.83), had a higher mouth's maximum opening (OR=1.43, CI=1.04-1.97), had a higher number of posterior teeth with attrition (OR=1.17, CI=1.00-1.37) and were more likely to drool on the pillow (OR=2.05, CI=1.15-3.67) compared to mesofacials. Dolichofacial adolescents were more likely of not presenting pain in the temporal muscle (OR=6.36, CI=2.30-17.54), to present themselves without marks on the tongue (OR=2.26, CI=1.09-4.69) and present a higher mouth's maximum opening (OR=2.09, CI=1.40-3.13) compared to brachyfacials. CONCLUSION Bruxism and its clinical features differ among dolichofacial, brachyfacial and mesofacial adolescents.
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Affiliation(s)
- Gabriela Luíza Nunes Souza
- Universidade Federal de Minas Gerais, Department of Child's and Adolescent's Oral Health, Belo Horizonte, Brazil.
| | - Junia Maria Serra-Negra
- Universidade Federal de Minas Gerais, Department of Child's and Adolescent's Oral Health, Belo Horizonte, Brazil
| | - Ivana Meyer Prado
- Universidade Federal de Minas Gerais, Department of Child's and Adolescent's Oral Health, Belo Horizonte, Brazil
| | - Sara Oliveira Aguiar
- Universidade Federal de Minas Gerais, Department of Child's and Adolescent's Oral Health, Belo Horizonte, Brazil
| | | | - Isabela Almeida Pordeus
- Universidade Federal de Minas Gerais, Department of Child's and Adolescent's Oral Health, Belo Horizonte, Brazil
| | - Sheyla Márcia Auad
- Universidade Federal de Minas Gerais, Department of Child's and Adolescent's Oral Health, Belo Horizonte, Brazil
| | - Lucas Guimarães Abreu
- Universidade Federal de Minas Gerais, Department of Child's and Adolescent's Oral Health, Belo Horizonte, Brazil; Department of Population & Patient Health, King's College London, London, United Kingdom
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Elsayed N, Shimo T, Tashiro M, Nakayama E, Nagayasu H. Disuse atrophy of masticatory muscles after intracranial trigeminal schwannoma resection: A case report and review of literature. Int J Surg Case Rep 2020; 75:23-28. [PMID: 32937220 PMCID: PMC7498842 DOI: 10.1016/j.ijscr.2020.08.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/28/2020] [Accepted: 08/30/2020] [Indexed: 12/04/2022] Open
Abstract
Temporomandibular disorders (TMD) are diseases of the temporomandibular joint and masticatory muscles, and are often difficult to be diagnosed. Determining the cause of facial asymmetry and jaw deviation are quite challenging. The morphologic and functional characteristics of masticatory muscles are maintained by sensory and motor innervation from the trigeminal nerve. Trigeminal schwannoma is a rare benign tumor originating from the Schwann cells. We experienced a case of masticatory muscle disuse atrophy during long-term follow-up after resection of intracranial trigeminal schwannoma.
Introduction Temporomandibular disorders (TMD) are diseases of the temporomandibular joint and masticatory muscles, and are often difficult to be diagnosed because they have various symptoms, pathological conditions and causes. Presentation of case Herein, we report a 78-year-old male referred to our hospital with a diagnosis of TMD and presenting with facial asymmetry, marked deviation to the right side on vertical mandibular movement and complaints of abnormal perception at the right oral and buccal region. Past medical history revealed that he had undergone a right intracranial trigeminal schwannoma resection 9 years prior. Computed tomography (CT) showed disuse atrophy of the right side of 4 masticatory muscles and 2 suprahyoid muscles controlled by the motor component of the mandibular division (V3) of the trigeminal nerve (TGN). Together with the neurosurgeon, we confirmed that there was no recurrence of the tumor and explained to the patient that the oral and maxillofacial symptoms are after-effects of the operation, and we provided oral hygiene instructions and coordinated cleaning of the inside of the oral cavity. Discussion Although it is difficult to compare treatment methods from case to case, we believe that in our case, the patient's understanding of the cause of his discomfort contributed significantly to the improvement of his quality of life. Conclusion We experienced a case of masticatory muscle disuse atrophy during long-term follow-up after resection of intracranial trigeminal schwannoma. Further studies are needed to develop the diagnostic and therapeutic protocols for disuse atrophy.
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Affiliation(s)
- Nagwan Elsayed
- Division of Oral and Maxillofacial Surgery, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido 061-0293, Japan
| | - Tsuyoshi Shimo
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido 061-0293, Japan.
| | - Masayasu Tashiro
- Division of Oral and Maxillofacial Radiology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido 061-0293, Japan
| | - Eiji Nakayama
- Division of Oral and Maxillofacial Radiology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido 061-0293, Japan
| | - Hiroki Nagayasu
- Division of Oral and Maxillofacial Surgery, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido 061-0293, Japan
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Chen W, Li Y, Dyer BA, Feng X, Rao S, Benedict SH, Chen Q, Rong Y. Deep learning vs. atlas-based models for fast auto-segmentation of the masticatory muscles on head and neck CT images. Radiat Oncol 2020; 15:176. [PMID: 32690103 PMCID: PMC7372849 DOI: 10.1186/s13014-020-01617-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 07/13/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Impaired function of masticatory muscles will lead to trismus. Routine delineation of these muscles during planning may improve dose tracking and facilitate dose reduction resulting in decreased radiation-related trismus. This study aimed to compare a deep learning model with a commercial atlas-based model for fast auto-segmentation of the masticatory muscles on head and neck computed tomography (CT) images. MATERIAL AND METHODS Paired masseter (M), temporalis (T), medial and lateral pterygoid (MP, LP) muscles were manually segmented on 56 CT images. CT images were randomly divided into training (n = 27) and validation (n = 29) cohorts. Two methods were used for automatic delineation of masticatory muscles (MMs): Deep learning auto-segmentation (DLAS) and atlas-based auto-segmentation (ABAS). The automatic algorithms were evaluated using Dice similarity coefficient (DSC), recall, precision, Hausdorff distance (HD), HD95, and mean surface distance (MSD). A consolidated score was calculated by normalizing the metrics against interobserver variability and averaging over all patients. Differences in dose (∆Dose) to MMs for DLAS and ABAS segmentations were assessed. A paired t-test was used to compare the geometric and dosimetric difference between DLAS and ABAS methods. RESULTS DLAS outperformed ABAS in delineating all MMs (p < 0.05). The DLAS mean DSC for M, T, MP, and LP ranged from 0.83 ± 0.03 to 0.89 ± 0.02, the ABAS mean DSC ranged from 0.79 ± 0.05 to 0.85 ± 0.04. The mean value for recall, HD, HD95, MSD also improved with DLAS for auto-segmentation. Interobserver variation revealed the highest variability in DSC and MSD for both T and MP, and the highest scores were achieved for T by both automatic algorithms. With few exceptions, the mean ∆D98%, ∆D95%, ∆D50%, and ∆D2% for all structures were below 10% for DLAS and ABAS and had no detectable statistical difference (P > 0.05). DLAS based contours had dose endpoints more closely matched with that of the manually segmented when compared with ABAS. CONCLUSIONS DLAS auto-segmentation of masticatory muscles for the head and neck radiotherapy had improved segmentation accuracy compared with ABAS with no qualitative difference in dosimetric endpoints compared to manually segmented contours.
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Affiliation(s)
- Wen Chen
- Department of Radiation Oncology, Xiangya Hospital, Central South University, Changsha, China.,Department of Radiation Oncology, University of California Davis Medical Center, 4501 X Street, Suite 0152, Sacramento, California, 95817, USA
| | - Yimin Li
- Department of Radiation Oncology, Xiamen Cancer Center, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China
| | - Brandon A Dyer
- Department of Radiation Oncology, University of California Davis Medical Center, 4501 X Street, Suite 0152, Sacramento, California, 95817, USA.,Department of Radiation Oncology, University of Washington, Seattle, WA, USA
| | - Xue Feng
- Carina Medical LLC, 145 Graham Ave, A168, Lexington, KY, 40536, USA
| | - Shyam Rao
- Department of Radiation Oncology, University of California Davis Medical Center, 4501 X Street, Suite 0152, Sacramento, California, 95817, USA
| | - Stanley H Benedict
- Department of Radiation Oncology, University of California Davis Medical Center, 4501 X Street, Suite 0152, Sacramento, California, 95817, USA
| | - Quan Chen
- Carina Medical LLC, 145 Graham Ave, A168, Lexington, KY, 40536, USA. .,Department of Radiation Oncology, Markey Cancer Center, University of Kentucky, RM CC063, 800 Rose St, Lexington, KY, 40536, USA.
| | - Yi Rong
- Department of Radiation Oncology, University of California Davis Medical Center, 4501 X Street, Suite 0152, Sacramento, California, 95817, USA.
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Righetti MA, Taube OLS, Palinkas M, Gonçalves LMN, Esposto DS, de Mello EC, Regalo IH, Regalo SCH, Siéssere S. Osteoarthrosis: Analyze of the Molar Bite Force, Thickness and Masticatory Efficiency. Prague Med Rep 2020; 121:87-95. [PMID: 32553092 DOI: 10.14712/23362936.2020.7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Osteoarthrosis is a disorder of synovial joints, resulting from destruction of the cartilage and subchondral bone. The present study is aimed to investigate the molar bite force, thickness and efficiency of the masseter and temporalis muscles of subjects with osteoarthrosis. A total of forty-eight subjects participated in the study. They were distributed into two groups: with osteoarthrosis (n=24) and asymptomatic controls (n=24). Subjects were analyzed on the basis of maximal molar bite force (right and left side), thickness (mandibular rest and dental clenching in maximal voluntary contraction) and electromyographic activity of masticatory cycles through the linear envelope integral in habitual (raisins and peanuts) and non-habitual (Parafilm M) chewing of the masseter and temporalis muscles. All the data were analyzed statistically using t-test with a significance level of p≤0.05. There was no difference between groups in maximal molar bite force, muscle thickness and non-habitual chewing. Differences were found on the raisins (p=0.02) and peanuts (p=0.05) chewing for right temporal muscle, with reduced masticatory muscle efficiency in osteoarthrosis subjects. This study showed that osteoarthrosis induces negative changes in habitual chewing, highlighting the efficiency of the right temporalis muscles. The greater temporal muscle activity in subjects with osteoarthrosis may compromise chewing and consequently the nutritional status of adult subjects.
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Affiliation(s)
| | | | - Marcelo Palinkas
- Anhanguera Faculty, Ribeirão Preto, São Paulo, Brazil. .,National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil. .,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.
| | | | | | | | | | - Simone Cecilio Hallak Regalo
- National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Selma Siéssere
- National Institute and Technology - Translational Medicine (INCT.TM), São Paulo, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
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Didier HA, Cappellari AM, Gaffuri F, Curone M, Tullo V, Didier AH, Giannì AB, Bussone G. Predictive role of gnathological techniques for the treatment of persistent idiopathic facial pain (PIFP). Neurol Sci 2020; 41:3315-9. [PMID: 32440980 DOI: 10.1007/s10072-020-04456-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 05/07/2020] [Indexed: 10/24/2022]
Abstract
INTRODUCTION/BACKGROUND Persistent idiopathic craniofacial pain (PIFP) is a heterogeneous group of pain syndromes whose main characteristic is the daily presence of persistent pain for at least 3 months. The pathophysiology of PIFP is still not entirely known and probably related to biological and psychological factors. Although PIFP has been attributed to the central neuron activity, the importance of masticatory muscles as a possible pathogenic mechanism was recently demonstrated. The main purpose of our paper was to identify the physiological rest position of the mandible with minimal tonus of both the elevator and depressor muscles and the neuromuscular trajectory of mouth closing obtained by transcutaneous electrical stimulation (TENS) and maintained with the use of an occlusal device, known as orthotic. MATERIALS AND METHODS The VAS scale for facial pain and the migraine disability assessment score (MIDAS) index for patient quality of life were evaluated at the beginning of the study for the 38 subjects that came to our attention. Our research included two phases. The first phase consisted of kinesiographic and electromyographic (EMG) examinations of the masticatory muscles and a 45-min application of TENS in order to deprogram the muscular activity. Kinesio-electromyographic examinations were repeated in the second phase. The main evaluated parameter was jaw deflection or deviation on the sagittal and frontal planes before and after TENS during patient tooth occlusion. Patients that showed a significant modification of this parameter were treated with orthotics for 12 months. RESULTS The results of a 12-month follow-up show a sharp reduction of the VAS (pre-orthotic 9.05, range 8-10, SD 0.8; post-orthotic 5.87, range 1-5, SD 0.7) and an improvement in the quality of life (MIDAS). CONCLUSIONS Our study demonstrated the usefulness of TENS as a screening method for the application of orthotics. This non-invasive and/or non-painful procedure could be a useful complementary treatment in this patient population. The results of the study also confirm the role of masticatory muscle dynamics as a possible pathogenic mechanism in patients with PIFP.
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Tanabe Y, Torisu T, Tada H, Yamaguchi E, Murata H, De Laat A, Svensson P. Pain sensitivity after low-level clenching is influenced by preloading eccentric exercise. Odontology 2020; 109:29-40. [PMID: 32274673 DOI: 10.1007/s10266-020-00516-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 03/31/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE To examine the effect of preloading eccentric exercise on pain sensitivity in healthy volunteers. METHODS In 20 healthy volunteers, pain-related sensations (6 items: pain, unpleasantness, fatigue, stiffness, tension, and soreness during maximum biting), and pain intensities induced by repeated electrical stimuli on the masseter and the hand palm were evaluated using a visual analog scale (VAS) of 0-100 mm. Eccentric exercise (6 min-test) or gum chewing (6 min-control) was used as preloading exercise to evaluate the effect on pain sensitivities before and after low-level clenching (15 min) performed 2 days after the preloading exercise. RESULTS Eccentric exercise induced only low levels of pain-related sensations 2 days later. However, the time course of temporal summation induced by four repeated electrical stimuli on the masseter was influenced by the type of preloading exercise, i.e., temporal summation increased after the low-level clenching (P = 0.016) when preloading was done by the eccentric exercise, while no significant change was observed when preloading was done by the gum chewing. CONCLUSIONS Eccentric exercise may facilitate pain sensitivity induced by subsequent low-level clenching via the central nervous system. In addition, it was demonstrated that pain sensitivity after the low-level clenching could be influenced by the type of preloading exercise. These experimental results may suggest that eccentric exercise could act as one of the triggering factors in the mechanism by which tooth clenching leads to a chronic pain condition in susceptible individuals.
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Affiliation(s)
- Yuichi Tanabe
- Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University, Sakamoto 1-7-1, Nagasaki, 852-8501, Japan
| | - Tetsurou Torisu
- Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University, Sakamoto 1-7-1, Nagasaki, 852-8501, Japan.
| | - Hiroaki Tada
- Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University, Sakamoto 1-7-1, Nagasaki, 852-8501, Japan
| | - Erika Yamaguchi
- Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University, Sakamoto 1-7-1, Nagasaki, 852-8501, Japan
| | - Hiroshi Murata
- Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University, Sakamoto 1-7-1, Nagasaki, 852-8501, Japan
| | - Antoon De Laat
- Department of Oral Health Sciences, KU Leuven, Leuven, Belgium.,Dentistry, University Hospitals Leuven, Kapucijnenvoer, 3000, Leuven, Belgium
| | - Peter Svensson
- Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.,Scandinavian Center for Orofacial Neurosciences (SCON), Vennelyst Boulevard 9, 8000, Aarhus C, Denmark.,Faculty of Odontology, Malmø University, Malmø, Sweden
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Abstract
The Bathyergidae, commonly known as blesmols or African mole-rats, is a family of rodents well-known for their subterranean lifestyle and tunnelling behaviour. Four of the five extant bathyergid genera (Cryptomys, Fukomys, Georychus and Heliophobius) are chisel-tooth diggers, that is they dig through soil with their enlarged incisors, whereas the remaining genus (Bathyergus) is a scratch-digger, only using its forelimbs for burrowing. Heterocephalus glaber, the naked mole-rat, is also a chisel-tooth digger and was until recently included within the Bathyergidae (as the most basally branching genus), but has now been placed by some researchers into its own family, the Heterocephalidae. Given the importance of the masticatory apparatus in habitat construction in this group, knowledge and understanding of the morphology and arrangement of the jaw-closing muscles in Bathyergidae is vital for future functional analyses. Here, we use diffusible iodine-based contrast-enhanced microCT to reveal and describe the muscles of mastication in representative specimens of each genus of bathyergid mole-rat and to compare them to the previously described musculature of the naked mole-rat. In all bathyergids, as in all rodents, the masseter muscle is the most dominant component of the masticatory musculature. However, the temporalis is also a relatively large muscle, a condition normally associated with sciuromorphous rodents. Unlike their hystricomorphous relatives, the bathyergids do not show an extension of the masseter through the infraorbital foramen on to the rostrum (other than a very slight protrusion in Cryptomys and Fukomys). Thus, morphologically, bathyergids are protrogomorphous, although this is thought to be secondarily derived rather than retained from ancestral rodents. Overall, the relative proportions of the jaw-closing muscles were found to be fairly consistent between genera except in Bathyergus, which was found to have an enlarged superficial masseter and relatively smaller pterygoid muscles. It is concluded that these differences may be a reflection of the behaviour of Bathyergus which, uniquely in the family, does not use its incisors for digging.
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Affiliation(s)
- Philip G Cox
- Department of Archaeology and Hull York Medical School, University of York, York, UK
| | - Chris G Faulkes
- School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
| | - Nigel C Bennett
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
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Gadotti I, Hicks K, Koscs E, Lynn B, Estrazulas J, Civitella F. Electromyography of the masticatory muscles during chewing in different head and neck postures - A pilot study. J Oral Biol Craniofac Res 2020; 10:23-27. [PMID: 32071851 DOI: 10.1016/j.jobcr.2020.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 01/07/2020] [Accepted: 02/03/2020] [Indexed: 12/26/2022] Open
Abstract
Objectives The objectives of this pilot study were to analyze the electromyography (EMG) activity of masseter and anterior temporalis muscles during chewing in 2 different posture conditions: natural head posture (NHP) and maximum yet comfortable forward head posture (FHP) in healthy individuals; and to compare EMG activity between subjects based on their NHP during chewing. Methods Fifteen subjects participated. Sagittal head posture in sitting position was clinically assessed using a plumb line. Participants were classified as having FHP or upright head posture (UP). Surface EMG was used to evaluate superficial masseter and anterior temporalis bilaterally during chewing in NHP and FHP. Three trials with five chewing cycles were recorded. EMG data were normalized using a maximum voluntary contraction. An independent t-test was used to calculate differences between sides. If no differences were found, both sides were analyzed together. To analyze differences between the 2 conditions, a paired t-test was used. Independent t-test was used to calculate difference between subjects with UP and FHP. Results A significant increase in muscle activity was found for masseter muscle in the FHP condition. No differences were found in muscle activity in natural head position by posture classification. A trend of increased activity was observed for masseter and temporalis muscles during chewing in FHP. Conclusion Head and neck posture was found to influence masticatory muscle activity during the function of chewing. The results of this study may help clinicians to better understand the association between head and neck posture alterations with masticatory muscles related disorders.
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Affiliation(s)
- Inae Gadotti
- Department of Physical Therapy, Florida International University, Miami, USA
| | - Kimani Hicks
- Department of Physical Therapy, Florida International University, Miami, USA
| | - Eric Koscs
- Department of Physical Therapy, Florida International University, Miami, USA
| | - Bryanna Lynn
- Department of Physical Therapy, Florida International University, Miami, USA
| | - Jansen Estrazulas
- Department of Physical Therapy, Florida International University, Miami, USA
| | - Fernanda Civitella
- Department of Physical Therapy, Florida International University, Miami, USA
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Botzenhart UU, Gredes T, Gerlach R, Zeidler-Rentzsch I, Gedrange T, Keil C. Histological features of masticatory muscles after botulinum toxin A injection into the right masseter muscle of dystrophin deficient (mdx-) mice. Ann Anat 2020; 229:151464. [PMID: 31978572 DOI: 10.1016/j.aanat.2020.151464] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 12/15/2019] [Accepted: 12/23/2019] [Indexed: 12/24/2022]
Abstract
OBJECTIVE/BACKGROUND The most frequently used animal model for human DMD (Duchenne muscular dystrophy) research is the mdx mouse. In both species, characteristic histological changes like inflammation, muscle fiber degeneration and fibrosis are the same, but in contrast to humans, in mdx mice, phases of muscle fiber degeneration are compensated by regeneration processes. AIM Therefore, the interest of this study was to evaluate histological features in masticatory muscles after BTX-A injection into the right masseter muscle of wild type and dystrophic (mdx) mice, illustrating de- and regeneration processes induced by this substance. MATERIAL AND METHODS The right masseter muscle of 100 days old healthy and mdx mice were selectively paralyzed by a single intramuscular BTX-A injection. Masseter as well as temporal muscle of injection and non-injection side were carefully dissected 21 days and 42 days after injection, respectively, and fiber diameter, cell nuclei position, necrosis and collagen content were analyzed histomorphologically in order to evaluate de- and regeneration processes in these muscles. Statistical analysis was performed using SigmaStat Software and Mann Whitney U-test (significance level: p < 0.05). RESULTS At both investigation periods and in both mouse strains fiber diameter was significantly reduced and collagen content was significantly increased in the right injected masseter muscle whereas fiber diameters in mdx mice were much smaller, and these differences were even more apparent at the second investigation period. Necrosis and central located nuclei could generally be found in all mdx mice muscles investigated with an amount of centronucleation exceeding 60%, and a significant increase of necrosis six weeks after injection. In wild type mice central located nuclei could primarily be found in the treated masseter muscle with a portion of 2.7%, and this portion decreased after six weeks, whereas in mdx mice a decrease could also be seen in the non-injected muscles. In contrast, in wild type mice necrosis was not apparent at any time and in all muscles investigated. CONCLUSION From our results it can be concluded that in mdx mice masticatory muscles de- and regeneration processes were extended, triggered by a selective BTX-A injection, or mdx mice at this age, independently of BTX-A treatment, went through another cycle of de- and regeneration as a characteristic of this disease.
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Affiliation(s)
- Ute Ulrike Botzenhart
- Medical Faculty Carl Gustav Carus Campus, Technische Universtität Dresden, Dresden, Germany.
| | - Tomasz Gredes
- Medical Faculty Carl Gustav Carus Campus, Technische Universtität Dresden, Dresden, Germany
| | - Ricarda Gerlach
- Medical Faculty Carl Gustav Carus Campus, Technische Universtität Dresden, Dresden, Germany
| | - Ines Zeidler-Rentzsch
- Medical Faculty Carl Gustav Carus Campus, Technische Universtität Dresden, Dresden, Germany
| | - Tomasz Gedrange
- Medical Faculty Carl Gustav Carus Campus, Technische Universtität Dresden, Dresden, Germany
| | - Christiane Keil
- Medical Faculty Carl Gustav Carus Campus, Technische Universtität Dresden, Dresden, Germany
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Lemos GA, Batista AUD, da Silva PLP, Araújo DN, Sarmento WEA, Palomari ET. Photobiostimulation activity of different low-level laser dosage on masticatory muscles and temporomandibular joint in an induced arthritis rat model. Lasers Med Sci 2020; 35:1129-39. [PMID: 31834562 DOI: 10.1007/s10103-019-02933-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 11/27/2019] [Indexed: 10/25/2022]
Abstract
This study aimed to investigate the anti-inflammatory effects of different dosage of low-level laser therapy (LLLT) in an experimental model of temporomandibular joint (TMJ) arthritis. One hundred male Wistar rats were used and divided into the following groups: CG, control group; AG, animals group with left TMJ arthritis induced by intra-articular injection of Complete Freund's adjuvant - CFA; LG5, LG10 and LG20 - animals with arthritis and treated with LLLT at doses 5, 10, and 20 J/cm2, respectively. Morphological analysis was performed by TMJ histological sections stained with hematoxylin-eosin (HE), picrosirius (PSR), and toluidine blue (TB), as well as histomorphometric evaluation of cartilage, articular disc, and masticatory muscles. The amount of feed consumed within 3 weeks was evaluated, and biochemical analysis of TMJ tissues included measurement of sulfated glycosaminoglycans (GAGs), matrix metalloproteinases (MMPs) 2 and 9 zymography, and ELISA for cytokines IL-6, TNF-α, and IL-1β. Only the 20 J/cm2 dose promoted higher feed intake compared to AG. On the other hand, all LLLT doses promoted better organization of articular disc collagen fibers, greater number of proteoglycans in articular cartilage, increased area and diameter of left lateral pterygoid fibers, reduced latent and active MMP 9 and 2 activity, and lower IL-1β concentration compared to AG. Considering the study limitations, it was observed that LLLT treatments were effective in protecting and tissue cleansing joint structures, accelerating tissue repair, especially at lower doses.
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Impellizzeri A, Serritella E, Putrino A, Vizzielli G, Polimeni A, Galluccio G. Assessment of Masticatory and Cervical Muscles' Thickness by Ultrasonography in Patients with Facial Asymmetry. Clin Ter 2019; 170:e272-e277. [PMID: 31304515 DOI: 10.7417/ct.2019.2147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE The aim of this study was to determine the relationship between the thickness of masticatory and cervical muscles (temporalis, masseter and sternocleidomastoid) and facial asymmetries in young patients. METHODS 21 subjects were selected, through a detailed anamnesis and clinical examination, in order to assess the normality of oral tissues, the presence of normal occlusion, the absence of alteration in tooth dimensions and of congenital or developmental anomalies of lips, mouth or face. RESULTS The present investigation showed that temporalis, masseter and sternocleidomastoid muscles in untreated and growing individuals with facial asymmetries are thinner on the omolateral side when compared with controlateral normal side, but in the untreated one this value is more statistically significantly. CONCLUSIONS In conclusion, the cervical muscle's thickness resulted increased in young patients Ultrasound is beginning to be recognized to have potential use in dentistry as a safe, noninvasive, comfortable and cost-effective adjunct to diagnosis by producing high-resolution images more easily than magnetic resonance (MRI) and computed tomography (CT) (27-kubo).
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Affiliation(s)
- A Impellizzeri
- PhD Student, Doctoral School in innovative technologies in diseases of the skeleton, of the skin and of the oro-maxillofacial district. Department of Orthodontics, school of Dentistry. Specialist in Orthognatodontic, Department of Orthodontics. "Sapienza" University of Rome
| | - E Serritella
- PhD Student, Doctoral School in innovative technologies in diseases of the skeleton, of the skin and of the oro-maxillofacial district. Department of Orthodontics, school of Dentistry. Specialist in Orthognatodontic, Department of Orthodontics. "Sapienza" University of Rome
| | - A Putrino
- PhD Student, Doctoral School in innovative technologies in diseases of the skeleton, of the skin and of the oro-maxillofacial district. Department of Orthodontics, school of Dentistry. Specialist in Orthognatodontic, Department of Orthodontics. "Sapienza" University of Rome
| | - G Vizzielli
- Specialist in Orthognatodontic, Unit of Orthodontics. Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Private Doctor in Rome
| | - A Polimeni
- Professor and Director of Department of Oral and Maxillofacial Sciences, Umberto I Hospital, "Sapienza" University of Rome
| | - G Galluccio
- Associate Professor, Director of Post-Graduate Course in Functional Orthodontics, Vice-President of the Course for Dental Degree - Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Italy
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Rusu MC, Nicolescu MI, Jianu AM, Mănoiu VS, Ilie AC, Dincă D. The ultrastructural anatomy of the nuclear envelope in the masseter muscle indicates its role in the metabolism of the intracellular Ca +. Ann Anat 2019; 224:117-123. [PMID: 31117003 DOI: 10.1016/j.aanat.2019.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 04/05/2019] [Accepted: 05/06/2019] [Indexed: 11/16/2022]
Abstract
Specific ultrastructural anatomy of masticatory muscles is commonly referred to a general pattern assigned to striated muscles. Junctional feet consisting of calcium channels of the sarcoplasmic reticulum (i.e. the ryanodine receptors, RyRs) physically connected to the calcium channels of the t-tubules build triads within striated muscles. Functional RyRs were demonstrated in the nuclear envelopes of pancreas and of a skeletal muscle derived cell line, but not in muscle in situ. It was hypothesized that ryanodine receptors (RyRs) could also exist in the nuclear envelope in the masseter muscle, thus aiming at studying this by transmission electron microscopy. There were identified paired and consistent subsarcolemmal clusters of mitochondria, appearing as outpockets of the muscle fibers, usually flanking an endomysial microvessel. It was observed on grazing longitudinal cuts that the I-band-limited mitochondria were not strictly located in a single intermyofibrillar space but continued transversally over the I-band to the next intermyofibrillar space. It appeared that the I-band-limited transverse mitochondria participate with the column-forming mitochondria in building a rather incomplete mitochondrial reticulum of the masseter muscle. Subsarcolemmal nuclei presented nuclear envelope-associated RyRs. Moreover, t-tubules were contacting the nuclear envelope and they were seemingly filled from the perinuclear space. This could suggest that nucleoplasmic calcium could contribute to balance the cytosolic concentration via pre-built anatomical routes: (i) indirectly, via the RyRs of the nuclear envelope and (ii) directly via the communication of t-tubules and sarcoplasmic reticulum through the perinuclear space.
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Affiliation(s)
- M C Rusu
- Division of Anatomy, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
| | - M I Nicolescu
- Division of Histology, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania; "Victor Babeș" National Institute of Pathology, Bucharest, Romania
| | - A M Jianu
- Division of Anatomy, Faculty of Medicine, "Victor Babeş" University of Medicine and Pharmacy, Timişoara, Romania
| | - V S Mănoiu
- Department of Cellular and Molecular Biology, National Institute of Research and Development for Biological Sciences, Bucharest, Romania
| | - A C Ilie
- Division of Anatomy, Faculty of Medicine, "Victor Babeş" University of Medicine and Pharmacy, Timişoara, Romania
| | - D Dincă
- Department II of Surgical Clinical Divisions, Faculty of Medicine, "Ovidius" University, Constanţa, Romania
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Giannasi LC, Dutra MTS, Tenguan VLS, Mancilha GP, Silva GRC, Fillietaz-Bacigalupo E, da Silva DB, Politti F, Nacif SR, de Oliveira EF, da Rocha JC, Rocha CT, Romero MM, de Oliveira CS, de Oliveira LVF, de Mello Rode S, Koga-Ito CY, Amorim JBO, Salgado MAC, Gomes MF. Evaluation of the masticatory muscle function, physiological sleep variables, and salivary parameters after electromechanical therapeutic approaches in adult patients with Down syndrome: a randomized controlled clinical trial. Trials 2019; 20:215. [PMID: 30975204 PMCID: PMC6460660 DOI: 10.1186/s13063-019-3300-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 03/18/2019] [Indexed: 01/12/2023] Open
Abstract
Background There are many comorbidities associated with Down syndrome (DS), including obstructive sleep apnea (OSA) and masticatory muscle alteration. Muscular hypotonia, in particular, of the masticatory and oropharyngeal muscles is one of the main characteristics of individuals with DS, resulting in impairments of speech, swallowing, and mastication in these individuals. In addition, total or partial obstruction of the airways during sleep can occur due to pharyngeal hypotonia, leading to snoring and to OSA. This progressive respiratory disorder is associated with a high risk of morbidity and mortality in individuals with DS. The aim of this research is to assess the therapeutic effects of surface neuromuscular electrical stimulation (NMES), the mastication apparatus (MA), and a mandibular advancement oral appliance (OAm) with an embedded thermosensitive microchip on the functions of masticatory muscles (bilateral masseter and temporal muscles), physiological sleep variables, and salivary parameters in adult patients with DS. Methods The patients with DS will be randomly selected and divided into three groups (DS-NMES, DS-MA, and DS-OAm) with a minimum of 10 patients in each group. A thermosensitive microchip will be embedded in the OAm to record its compliance. The therapeutic effects on masticatory muscle function will be investigated through electromyography, a caliper, and a force-transducer device; the sleep variables, in turn, will be evaluated by means of polysomnography. The physicochemical and microbiological properties of the saliva will also be analyzed, including the salivary flow, viscosity, buffer capacity, cortisol levels (susceptibility to psychological and/or physical stress), and Pseudomonas aeruginosa levels (risk of aspiration pneumonia) in these patients. The methods determined for this study will be carried out prior to and after 2 months of the recommended therapies. Discussion The primary outcomes would be the improvement and/or reestablishment of the function of masticatory muscles and the physiological sleep variables in this target public since individuals with DS commonly present generalized muscular hypotonia and dysfunction of the oropharyngeal musculature. As a secondary outcome indicator, the impact of the applied therapies (NMES, MA, and OAm) on the salivary microbiological and physicochemical properties in DS individuals will also be assessed. Furthermore, the compliance of OAm usage will be measured through a thermosensitive microchip. Trial registration Registro Brasileiro de Ensaios Clínicos, RBR-3qp5np. Registered on 20 February 2018. Electronic supplementary material The online version of this article (10.1186/s13063-019-3300-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lilian Chrystiane Giannasi
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil. .,Metropolitan University of Santos, Santos, Brazil. .,University Center of Anápolis-UniEvangélica, Anápolis, Brazil.
| | - Marignês T S Dutra
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Vera L S Tenguan
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Gabriela P Mancilha
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Gabriela R C Silva
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Elaine Fillietaz-Bacigalupo
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Daniel B da Silva
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | | | - Sergio R Nacif
- Hospital do Servidor Público Estadual de São Paulo (IAMSPE-HSPE), São Paulo, Brazil
| | | | - João C da Rocha
- Discipline of Pediatric Dentistry Institute of Science and Technology, São Paulo, Brazil
| | - Carolina T Rocha
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Mateus M Romero
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | | | | | - Sigmar de Mello Rode
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Cristiane Yumi Koga-Ito
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Jose B O Amorim
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Miguel A C Salgado
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
| | - Mônica F Gomes
- Center of Biosciences Applied to Patients with Special Health Care Needs (CEBAPE), Institute of Science and Technology, São José dos Campos Campus, São Paulo State University-UNESP, R: Esperança 265, São Paulo, SP, Brazil
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Demjaha G, Kapusevska B, Pejkovska-Shahpaska B. Bruxism Unconscious Oral Habit in Everyday Life. Open Access Maced J Med Sci 2019; 7:876-881. [PMID: 30962854 PMCID: PMC6447347 DOI: 10.3889/oamjms.2019.196] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 02/21/2019] [Accepted: 02/22/2019] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND: Bruxism is defined as an unconscious oral habit of rhythmical, unfunctional clenching, grinding and making chewy sounds with the teeth while making movements that are not part of the masticatory function and that lead to occlusal trauma. AIM: The purpose of this article is to show the habit bruxism, in everyday life, reviewing literature data. METHODS: Data was researched by using information on the internet on Researchgate, Pubmed, ScienceDirect, by analysing written articles and books and student books. From 200 articles that were analysed, 45 articles and two textbooks were involved in writing of this review article. RESULTS: Results derived from the analyzed literature, classify the main consequences of bruxism, from fatigue, pain, wasting of the incisal edges and occlusal surfaces of the teeth to loss of teeth, dental implants, headaches, periodontal lesions and TMD (dysfunctions of the masticatory muscles and temporomandibular joint (TMJ)) in severe cases. All these problems negatively affect the quality of everyday life of the patient. CONCLUSION: Bruxism as a parafunctional habit is present in everyday life needing a multidisciplinary approach for prevention of the teeth, bone and prosthetic restorations. The prevalence of bruxism is growing related to stress, drugs, changes in lifestyle, bad nutrition and sleep problems. The therapist should follow signs and symptoms to ensure the best treatment plan of the patient.
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Affiliation(s)
| | - Biljana Kapusevska
- Faculty of Dentistry, Ss Cyril and Methodius University of Skopje, Skopje, Republic of Macedonia
| | - Budima Pejkovska-Shahpaska
- University Dental Clinic St. Pantelejmon, Departement for Removable Prosthetics, Skopje, Republic of Macedonia
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Didier HA, Cappellari AM, Gaffuri F, Curone M, Tullo V, Didier AH, Giannì AB, Bussone G. The role of electrophysiological investigations of masticatory muscles in patients with persistent idiopathic facial pain. Neurol Sci 2019; 40:169-173. [PMID: 30825018 DOI: 10.1007/s10072-019-03770-1] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
INTRODUCTION The authors tried to establish whether there is any electrophysiological difference of masticatory muscle activity between patients with persistent idiopathic facial pain (PIFP) and healthy subjects. METHODS Twenty-eight PIFP patients (6 men and 22 women, mean age 40 years) and 28 normal subjects (12 men and 16 women, mean age 40 years) underwent EMG of temporal and masseter muscles before and after transcutaneous electric nerve stimulation (TENS). RESULTS After TENS stimulation, the mean amplitude difference was found to be smaller than the baseline before TENS in the PIFP patients compared with healthy subjects. CONCLUSIONS The peculiar behavior of masticatory muscles after TENS could be relevant in order to explain the well-known improvement of pain reported by some PIFP patients after orthosis positioning.
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Affiliation(s)
- H A Didier
- Dental and Oral Surgery, The University of Milan and Headache and Facial Pain Center, Maxillo-facial and Dental Unit, IRCCS Foundation Ca' Granda, Maggiore Policlinico Hospital, The University of Milan, Via Francesco Sforza 35, 20122, Milan, Italy.
| | - A M Cappellari
- Department of Neuroscience, IRCCS Foundation Ca' Granda, Maggiore Policlinico Hospital, The University of Milan, Via Francesco Sforza 35, 20122, Milan, Italy
| | - F Gaffuri
- Dental and Oral Surgery, The University of Milan and Headache and Facial Pain Center, Maxillo-facial and Dental Unit, IRCCS Foundation Ca' Granda, Maggiore Policlinico Hospital, The University of Milan, Via Francesco Sforza 35, 20122, Milan, Italy
| | - M Curone
- Igea Healthcare Institute, Milan, Italy
| | - V Tullo
- Igea Healthcare Institute, Milan, Italy
| | - A H Didier
- Hospital Pharmacy, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - A B Giannì
- Dental and Oral Surgery, The University of Milan and Headache and Facial Pain Center, Maxillo-facial and Dental Unit, IRCCS Foundation Ca' Granda, Maggiore Policlinico Hospital, The University of Milan, Via Francesco Sforza 35, 20122, Milan, Italy
| | - G Bussone
- Igea Healthcare Institute, Milan, Italy.,C. Besta Neurological Institute Foundation and Igea Healthcare Institute, Milan, Italy
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Takeuchi-Sato T, Arima T, Mew M, Svensson P. Relationships between craniofacial morphology and masticatory muscle activity during isometric contraction at different interocclusal distances. Arch Oral Biol 2018; 98:52-60. [PMID: 30448395 DOI: 10.1016/j.archoralbio.2018.10.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 10/17/2018] [Accepted: 10/26/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The aim was to investigate relationships amongst interocclusal distances, masticatory muscle electromyographic (EMG) activity during isometric contraction of masticatory muscles, and craniofacial morphology. DESIGN Twenty-eight women and 12 men (25.3 ± 3.8 years old) participated. After measuring maximal voluntary occlusal bite force (MVOBF) between the right-first premolars, the participants were asked to bite at submaximal levels of 0 (= holding the bite force transducer), 15, 22.5, and 30% MVOBF with the use of visual feedback. The thickness of a bite force transducer was set at 10, 12, 13, 14, 16, 17, 18, 19, 20, 22, and 24 mm (= interocclusal distance: IOD). Nine soft tissue craniofacial factors were assessed through digital photograph: face height, middle face height, lower face height, face width, inter-pupil distance and mandibular plane angle, lower face height / face height ratio, inter-pupil distance / facial width ratio and face width / face height ratio. RESULTS In the masseter muscle, EMG activity decreased with increased IODs. The participants with higher mandibular plane angle had more negative slope coefficients of IOD-EMG graphs at 0% MVOBF especially in male temporalis and female masseter and temporalis muscles, suggesting that a greater mandibular plane angle is associated with lower EMG activity at longer IOD. CONCLUSIONS Overall the findings support the notion that craniofacial morphology is associated with differences in neuromuscular activity of the masticatory muscles, and suggest that the neuromuscular effects of oral appliances may be dependent on patients' craniofacial morphology and the thickness of the device. (247/250 words).
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Affiliation(s)
- Tamiyo Takeuchi-Sato
- Division of Temporomandibular Disorders and Orofacial Pain, Department of Special Needs Dentistry, Showa University, Tokyo, Japan.
| | - Taro Arima
- Section of International Affairs, Faculty of Dental Medicine and Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.
| | | | - Peter Svensson
- Section of Orofacial Pain and Jaw Function, Aarhus University, Aarhus, Denmark; Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden; Scandinavian Centre for Orofacial Neuroscience (SCON).
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Hanisch M, Hanisch L, Fröhlich LF, Werkmeister R, Bohner L, Kleinheinz J. Myositis ossificans traumatica of the masticatory muscles: etiology, diagnosis and treatment. Head Face Med 2018; 14:23. [PMID: 30373608 PMCID: PMC6206835 DOI: 10.1186/s13005-018-0180-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 10/15/2018] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Myositis ossificans describes a heterotopic bone formation within a muscle. Thereby myositis ossificans is classified in two different groups: myositis ossificans progressiva (MOP) which describes a genetic autosomal dominant rare disease and myositis ossificans traumatica (MOT). The exact pathogenesis of MOT is unclear. The aim of this article was to analyse and interpret the existing literature reporting MOT of masticatory muscles and compare the results with our own clinical experience with MOT. Risk-factors, etiology, clinical features, diagnostic imaging, as well as different treatment options were evaluated and recommendations for the prevention, diagnosis, and therapy of MOT of the masticatory muscles were given. METHODS Following the PRISMA-Guidelines, a systematic search within the PubMed/Medline database with a view to record literature of MOT of the masticatory muscles was performed. Furthermore, the database of our own clinic was screened for cases of MOT. RESULTS In total, 63 cases of MOT of the masticatory muscles which were reported in English-based literature were included in this study. Overall, 25 female and 37 male patients could be analysed whereas one patient's gender was unknown. Complication of wisdom-tooth infection (n = 3) as well as the results of dental procedures like dental extraction (n = 7), mandibular nerve block (n = 4), periodontitis therapy (n = 1) were reported as MOT cases. From the 15 reported cases that appeared after dental treatment like extraction or local anesthesia the medial pterygoid (n = 10) was the most affected muscle. Hereof, females were more affected (n = 9) than males (n = 6). The most reported clinical symptom of MOT was trismus (n = 54), followed by swelling (n = 17) and pain (n = 13). One clinical case provided by the authors was detected. CONCLUSIONS Dental procedures, such as local anesthesia or extractions, may cause MOT of the masticatory musculature. Demographical analyses demonstrate that females have a higher risk of developing MOT with respect to dental treatment. The most important treatment option is surgical excision. Subsequent physical therapy can have beneficial effects. Nevertheless, a benefit of interpositional materials and drugs as therapy of MOT of the masticatory muscles has not yet been proven. Myositis ossificans progressiva has to be excluded.
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Affiliation(s)
- Marcel Hanisch
- Department of Cranio-Maxillofacial Surgery, Research Unit Rare Diseases with Orofacial Manifestations (RDOM), University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude W 30, D-48149 Münster, Germany
| | - Lale Hanisch
- Department of Orthodontics, Faculty of Health, School of Dentistry, Witten/Herdecke University, Alfred-Herrhausen-Strasse 44, 58455 Witten, Germany
| | - Leopold F. Fröhlich
- Department of Cranio-Maxillofacial Surgery, AG VABOS, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude W 30, D-48149 Münster, Germany
| | - Richard Werkmeister
- Department of Oral and Maxillofacial Surgery, Central German Armed Forces Hospital, Rübenacher Strasse 170, 56072 Koblenz, Germany
| | - Lauren Bohner
- Department of Cranio-Maxillofacial Surgery, Research Unit Rare Diseases with Orofacial Manifestations (RDOM), University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude W 30, D-48149 Münster, Germany
| | - Johannes Kleinheinz
- Department of Cranio-Maxillofacial Surgery, Research Unit Rare Diseases with Orofacial Manifestations (RDOM), University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude W 30, D-48149 Münster, Germany
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Regalo SCH, de Lima Lucas B, Díaz-Serrano KV, Frota NPR, Regalo IH, Nassar MSP, Righetti MA, Oliveira LF, Gonçalves LMN, Siéssere S, Palinkas M. Analysis of the stomatognathic system of children according orthodontic treatment needs. J Orofac Orthop 2018; 79:39-47. [PMID: 29330612 DOI: 10.1007/s00056-017-0117-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 11/20/2017] [Indexed: 12/18/2022]
Abstract
PURPOSE The present study evaluated electromyographic activity (EMG), masticatory performance, and tongue strength in children without and with orthodontic treatment needs. PATIENTS AND METHODS A total of 90 children were screened and divided into the following groups: Group I (no treatment needed; mean age: 8.00 ± 0.43 years; n = 26), Group II (few malocclusions, treatment needed; mean age: 8.89 ± 0.43 years; n = 28), and Group III (slight-to-borderline treatment needed; mean age: 8.44 ± 0.22 years; n = 36). Orthodontic treatment need was classified on the basis of IOTN-DHC (Index of Orthodontic Treatment Need - Dental Health Component). The electromyographic Trigno EMG Systems was used for muscle analysis and the Iowa Oral Pressure Instrument (IOPI) was used to measure tongue strength. Data were analyzed using normality tests and one-way analysis of variance with a Bonferroni post hoc test (p ≤ 0.05). RESULTS EMG in almost all mandibular movements was higher in Group III with statistically significant differences compared to position at rest: right masseter (p = 0.03); protrusion: left temporal (p = 0.02); saliva swallowing: left temporal (p = 0.05) and water swallowing: orbicularis oris mouth, right upper segment (p = 0.05). Lower masticatory performance was found in Group III, but the difference compared to Group I and II was not significant. There were no significant differences between the groups in terms of tongue strength. CONCLUSIONS Children with borderline orthodontic treatment needs show functional disorders of the stomatognathic system.
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Affiliation(s)
- Simone Cecílio Hallak Regalo
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Bárbara de Lima Lucas
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Kranya Victoria Díaz-Serrano
- Department of Pediatric Clinics, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Nicolly Parente Ribeiro Frota
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Isabela Hallak Regalo
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Mariângela Salles Pereira Nassar
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Mariah Acioli Righetti
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Lígia Franco Oliveira
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Lígia Maria Napolitano Gonçalves
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Selma Siéssere
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Marcelo Palinkas
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n-Ribeirão Preto, 14040-904, São Paulo, Brazil.
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Abstract
Objectives To study anterior bite opening of unknown cause presenting in adulthood regarding prevalence, symptoms of Temporomandibular Dysfunction (TMD) and possible causes of the bite opening. Methods Patients referred to two Orofacial Pain and TMD clinics with the complaint of recent anterior bite opening, presenting in adulthood and of unknown cause, were considered for the study. Patients with systemic rheumatic or neuromuscular diseases, degenerative joint disease, previous fractures of the jaws or orthodontic treatment, were excluded. The clinical examination was according to DC/TMD and extended for the occlusion. Reported symptoms, clinical signs, the occlusion and diagnoses found are presented. According to the information gained from the patient's history, previous occlusion and appearance, and present signs of parafunction, a possible association with the bite opening was suggested. Results Anterior bite opening was found in 1.6% of the referred patients. Symptoms of tiredness and/or orofacial pain were reported by 62%, headache by 41%, TMJ clicking by 24% and sensitive/tender teeth by 41%. Parafunction or bruxism was reported by 2/3 of the patients. A previous period in life of TMD symptoms, before the bite opening, was reported by 66%. Myalgia and headache associated with TMD were frequently diagnosed. The use of a partial dental splint, tongue pressure and pregnancy were possible causes found for the bite opening. Conclusion Anterior bite opening can occur in adulthood without organic or systemic disease of the TMJ or masticatory muscles, and was frequently associated with muscle TMD symptoms.
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Affiliation(s)
- Karolina Broberg
- Clinic of Orofacial Pain, University Clinics of Odontology, Public Dental Health, Region Västra Götaland, Gothenburg, Sweden.,Clinic of Orofacial Pain, Public Dental Health, Region Västra Götaland, Borås, Sweden
| | | | - Christina Mejersjö
- Clinic of Orofacial Pain, University Clinics of Odontology, Public Dental Health, Region Västra Götaland, Gothenburg, Sweden
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