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Wei J, Zhang S, Chen Z, Tu S, Wang Y, Feng Y, Kuang Z, Wu L, Ai H. The prevalence of temporomandibular disorder and temporomandibular morphology among diverse chronotype profiles. Chronobiol Int 2023; 40:1444-1453. [PMID: 37850303 DOI: 10.1080/07420528.2023.2270054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 10/05/2023] [Indexed: 10/19/2023]
Abstract
This study investigates the influence of chronotype on the prevalence of temporomandibular joint disorders (TMD) and the morphology of temporomandibular joint (TMJ). According to the Morningness-Eveningness Questionnaire-Self-Assessment, the participants were divided into morning group (n = 30), intermediate group (n = 83), and evening group (n = 30). Thirty participants were randomly selected from the intermediate group for subsequent examination and measurements. The morphology of TMJs was investigated using questionnaire and clinical examination form in Diagnostic Criteria for Temporomandibular Disorder. Meanwhile, the morphological results of TMJs were measured from cone-beam computed tomography images. The prevalence rate of TMD in the morning group (23%) was significantly lower than that in the intermediate group (56.7%), while there was no difference between the evening (53.4%) and intermediate groups. As to morphological measurements, there was no significant difference among three groups in mediolateral width of condylar process, anteroposterior width of condylar process, radius of condyle, medial joint space, lateral joint space, condylar stress angle, horizontal condylar inclination, width of glenoid fossa, depth of glenoid fossa, and posterior joint space, while there was a significant difference in horizontal condylar angle (p = 0.00490), articular eminence inclination (p < .0001), anterior joint space (p = 0.0163), and superior joint space (p = 0.0004). The morphology of TMJ in the morning group was better than that in the evening and intermediate groups. An association was found between TMD prevalence, temporomandibular morphology, and chronotype.
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Affiliation(s)
- Jiaming Wei
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Sai Zhang
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zheng Chen
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shaoqin Tu
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yuxuan Wang
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yi Feng
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhili Kuang
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Liping Wu
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Hong Ai
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Zheng H, Shi L, Lu H, Liu Z, Yu M, Wang Y, Wang H. Influence of edentulism on the structure and function of temporomandibular joint. Heliyon 2023; 9:e20307. [PMID: 37829806 PMCID: PMC10565695 DOI: 10.1016/j.heliyon.2023.e20307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 09/11/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023] Open
Abstract
Background With the acceleration of the aging process of the population, the number of edentulous patients continuously increased. Edentulism induces the loss of occlusal relationship and cause adverse effects on the stomatognathic system. Temporomandibular joint (TMJ), as a significant component of this system, may also be affected by edentulism in the process of supporting mandibular movement. Purpose Provide a comprehensive review of the structure and function of TMJ in the edentulous population, as well as the prevalence of temporomandibular joint disorder (TMD) in edentulous group. Study selection An electronic search was conducted on articles prior to December 2022 to filter all papers relevant to the structure and function of TMJ in edentulous population. The internet databases (PubMed, Cochrane Library, Embase) were searched using various combinations of keywords for "edentulism" or "edentulous" and "TMJ" or "TMD". Results Firstly, 522 articles were selected from the internet database, and finally, a total of 44 articles met the inclusion and exclusion criteria. The research content of these articles mainly focuses on the structure and function of TMJ in edentulous patients, as well as the clinical signs and symptoms of TMD. Conclusions Edentulous arch induces the loss of occlusal relationship, which may lead to degenerative changes of TMJ components consisting of changes in morphology and bone mass density of condyle, articular fossa, and articular eminence. In addition, the condyle could be shifted backward and upward, and displacement of the articular disc may occur after dentition loss. And the condyle and the articular disc may be guided back to the normal position after effective prosthodontic treatment. But the conclusions of the study on the function of TMJ and the prevalence of TMD in edentulous people are inconsistent. The condition of TMJ, especially the position of condyle-fossa and the symptoms and signs of TMD should not be ignored. If necessary, radiographic examinations should be performed.
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Affiliation(s)
- Huiyun Zheng
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Lei Shi
- Department of Prosthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Hongye Lu
- Department of Prosthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Zhichao Liu
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Mengfei Yu
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Yu Wang
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Huiming Wang
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
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Vîrlan MJR, Costea DE, Păun DL, Zamfir-Chiru-Anton A, Sterian AG, Spînu AD, Nimigean V, Nimigean VR. Degenerative bony changes in the temporal component of the temporomandibular joint - review of the literature. ROMANIAN JOURNAL OF MORPHOLOGY AND EMBRYOLOGY = REVUE ROUMAINE DE MORPHOLOGIE ET EMBRYOLOGIE 2022; 63:61-69. [PMID: 36074669 PMCID: PMC9593128 DOI: 10.47162/rjme.63.1.06] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Temporomandibular joint (TMJ) changes are quite frequent in adults, but not all changes are degenerative. A high prevalence of bone alterations in the TMJs was reported by different research groups. Disturbed remodeling of bony articulating structures occurs because of overloading masticatory forces or because the mechanical loading in the area out-weighs the adaptive capacity of the TMJ structures. Although most of the degenerative TMJ alterations are identified at the level of the condylar process, a complete evaluation of the degenerative modifications encountered in the temporal TMJ region should not be forgotten as they are important for a comprehensive assessment and further management of the clinical situation. Several research groups have described osseous remodeling in the temporal component of the TMJ. Evidence is scarce for degenerative modifications at the level of the articular eminence and thickening of the roof of the glenoid fossa has been associated with osteoarthritis.
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Affiliation(s)
- Maria Justina Roxana Vîrlan
- Discipline of Anatomy, Faculty of Dental Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania;
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