Symptoms, disc position, occluding pairs, and facial skeletal characteristics of older patients with temporomandibular disorders

• Published in: Journal of international medical research 2021-02, Vol.49 (2), p.300060521990530-300060521990530
• Main Authors: Zhao, Xiaokai, Xiong, Xin, Sun, Wei, Shu, Chang, Gu, Jinning, Liu, Yang
• Format: Article
• Language: English
• Subjects: Aged; Cephalometry; Cross-Sectional Studies; Humans; Joint Dislocations; Magnetic Resonance Imaging; Middle Aged; Retrospective Clinical Research Report; Retrospective Studies; Temporomandibular Joint Disc; Temporomandibular Joint Disorders - diagnostic imaging
• ISSN: 0300-0605; 1473-2300
• DOI: 10.1177/0300060521990530

Objective To describe the proportions of different osseous diagnoses in older patients with temporomandibular disorders (TMD) and to analyze the symptoms, disc position, occluding pairs, and facial skeletal characteristics of patients with bilateral osteoarthrosis (BOA) and bilateral normal joints (BNJ). Methods This retrospective cross-sectional study constituted 88 older patients (age ≥60 years). The osseous diagnosis, symptoms, disc position, occluding pairs, and facial skeletal characteristics were evaluated. Variables in BOA patients and BNJ patients were compared using the t-test and chi-square test. Results Forty-eight patients had BOA, 7 had unilateral osteoarthrosis, 11 had intermediate osteoarthrosis, and 22 had BNJ. The prevalence of disc displacement without reduction (DDw/oR) in BOA patients was significantly higher than in BNJ patients. BOA patients exhibited greater ANB angle, PP-MP, U1-NPo, L1-NPo, and facial convexity angle; shorter posterior cranial base; and decreased ramus height. Conclusion BOA patients with associated DDw/oR had more complaints of orofacial pain and exhibited a shorter posterior cranial base, and greater mandibular retrusion, anterior tooth protrusion, and protruded profile than BNJ patients.