关键词: 颞下颌关节紊乱, 咬合, 深覆牙合, 流行病学

Abstract: Objective　To investigate the prevalence of temporomandibular joint disorder in 12-year-old adolescents in Shanghai，analysis the relationship with anterior teeth occlusion. Methods　Totally 816 12-year-old adolescents were selected randomly from 16 districts in Shanghai in 2018. Palpation and auscultation methods were used to examine the temporomandibular joint signs，and the anterior occlusal relationship with arthrosis. To establish Logistic regression model to analyze the relationship between temporomandibular joint disorder and anterior teeth occlusion. Results　Finally，808 12-year-old adolescents completed the examination， 120 of them had symptoms of temporomandibular joint disorder，the prevalence rate was 14.9%，and the main symptoms were  open-mouth deviation （90.8%）. Logistic regression analysis showed that the deviation of midline of lower dentition and overbite of the anterior teeth were related to the occurrence of temporomandibular joint disorder，especially open-mouth deviation. Conclusion　Temporomandubular joint disorder in 12-year-old adolescents in Shanghai were mainly characterized as open-mouth abnormalities，the deviation of midline of lower dentition with overbite of the anterior teeth increases the risk of open-mouth abnormalities，as a result，closely observations and appropriate preventing and treating measures should be take in such patients.

Key words: temporomandibular dysfunction, occlusion, overbite, epidemiology