Influence of edentulism on the structure and function of temporomandibular joint

Huiyun Zheng; Lei Shi; Hongye Lu; Zhichao Liu; Mengfei Yu; Yu Wang; Huiming Wang

doi:10.1016/j.heliyon.2023.e20307

Influence of edentulism on the structure and function of temporomandibular joint

Heliyon. 2023 Sep 23;9(10):e20307. doi: 10.1016/j.heliyon.2023.e20307. eCollection 2023 Oct.

Authors

Huiyun Zheng¹, Lei Shi², Hongye Lu², Zhichao Liu¹, Mengfei Yu¹, Yu Wang¹, Huiming Wang¹

Affiliations

¹ 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.
² 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.

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.

Keywords: Complete denture; Temporomandibular disorders; Temporomandibular joint; edentulism.

Publication types

Review