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[Epidemic investigation on 3 to 6 years children's bruxism in Shanghai.].

PURPOSE
The present investigation analyzed the states of children bruxism in Shanghai, aiming for early diagnosis and early treatments.


METHODS
The investigation was conducted through questionnaising 779 3-to-6-years-old children's parents. The data were processed using Chi square test.


RESULTS
(1)The prevalence of children bruxism in Shanghai was about 38.4%; (2)151 males (40.6%) and 148 females (36.4%) had bruxism, which indicated no statistic difference in two genders(X2=1.47, P>0.05);(3)There seemed to exist hereditary difference between children with or without bruxism(X2=102.98, P<0.01).


CONCLUSION
There is a high bruxism prevalence among children aged from 3 to 6 years in Shanghai, which should be concerned about by the healthy care workers in order to make early diagnosis and treatment.