title: [Epidemic investigation on 3 to 6 years children's bruxism in Shanghai.].
abstract: OBJECTIVE
  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).
  
  
  CONCLUSIONS
  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.
authors.affiliation: Department of Prosthodontics, School of Stomatology,Shanghai Second Medical University, Shanghai 200011, China.
authors.forename: Yu-qin
authors.initials: YQ
authors.lastname: Chen
authors.forename: Hui-juan
authors.initials: HJ
authors.lastname: Cheng
authors.forename: Chun-hua
authors.initials: CH
authors.lastname: Yu
authors.forename: Yue
authors.initials: Y
authors.lastname: Gao
authors.forename: Yong-qin
authors.initials: YQ
authors.lastname: Shen
mesh_terms: D002012:Bruxism / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence