[Oral behavior characteristics of 540 patients suffering from temporomandibular disorders].

Purpose: To test the reliability of the Chinese version of Oral Behaviours Checklist (OBC) and explore oral behavior characteristics of patients with temporomandibular disorders (TMD).

Methods: The English version of OBC was translated forward and backward to form the Chinese version of OBC. From July 2017 to April 2018, 540 TMD patients were included. Cronbach's α was used to evaluate the reliability of Chinese version of OBC. The characteristics of oral behaviors were evaluated by OBC. SPSS 19.0 software package was used to calculate the frequency of each behavior, and rank sum test was used to compare the distribution of oral behavior of TMD patients of different genders.

Results: The reliability of Chinese version of the OBC was good, Cronbach's α=0.771.There were certain oral behaviors in TMD patients, such as sleeping in a position that puts pressure on the jaw(52.9%), chewing food unilaterally(47.8%) and contacting teeth while not eating (33.2%).

Conclusions: The Chinese version of OBC is a reliable tool for assessing oral behaviors. TMD patients have certain oral behaviors, which await further investigations.