Abstract
To investigate the prevalence of temporomandibular disorders (TMD) in undergraduates of Xinjiang Medical University and analyse its possible risk factors. A sample of 700 medical students included 244 males and 456 females was selected from Xinjiang Medical University and underwent examination of temporomandibular joint, questionnaire survey. Their average age was 20.08±1.457 years. Prevalence of TMD was analyzed, and the possible risk factors associated with the disease were identified by logistic regression analysis with SPSS17.0 software package. The prevalence of TMD was 42.40% in this population. There was no difference between different ethnics. Chewing-side preference, bruxism，orthodontic treatment，tooth extraction，psychological factors，anterior overjet, posterior scissors-bite were the main risk factors which increased the occurrence of TMD. Poor oral habits, psychological factors and malocclusion were related to the development of TMD.
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