Objective To understand the situation and state of bruxism of graduate students and its related factors.Method To select 1 944 graduate students of Xi’an Jiaotong University participating in physical examination in 2014 and conduct questionnaire survey and oral examination on them

and conduct statistical analysis of the results of the examination.Results The rate of the occurrence of bruxism of graduate students was14.0%

about which the occurrence rate of male students was 13.9%

while that of the female students was14.2%

which was slightly higher than the former

but the differences were not statistically significant.41.0%of those surveyed claimed there were cases of of bruxism in their dormitory roommates

among whom 73.7%reported adverse effect on sleep during the night.Staying up late

anxiety

parental bruxism

and temporomandibular disorders are the risk factors of bruxism（P<0.01）.Conclusion The occurrence rate of bruxism among graduate students is rather high and negative effects resulting from it were visible both to the health of patients themselves and to that of cohabitants

whereas the rate of those afflicted by bruxism seeking treatment in hospital was fairly low.College authority should take it seriously and enhance the health education to prevent or reduce the occurrence of bruxism in college students.