title: [Epidemiologic survey of dental fluorosis and caries in school students in Wensu county in Xinjiang].
abstract: OBJECTIVE
  To assess the relationship between the dental fluorosis and caries,and their prevalence features in school students in Wensu country in Xinjiang.
  
  
  METHODS
  The study groups consisted of 1527 Weuer and Han students at the age of 6 to 16. Dental fluorosis and caries disease were assessed strictly by Dean's Classification Standard and WHO "Oral Health Surveys Basic Methods" (the 3rd ed). The concentration of fluorine in water and urine was measured by using selective electrode.
  
  
  RESULTS
  The prevalence and index of dental fluorosis in Weuer and Han students were 73.70%, 64.67%, 1.647, 1.303,respectively. The prevalence of dental caries and DMFT were 61.19%, 42.66%, 1.648, 1.023 respectively. The corresponding values were 51.94%, 52.99%, 1.305, 1.449 for students of fluorosis group and non-fluorosis group, respectively. The fluorine degree of water was 2-5mg/L,the average value of fluorine in urine was 3.64 mg/L in Han students, and 5.28 mg/L in Weuer students.
  
  
  CONCLUSIONS
  The prevalence of dental caries didn't decrease, even though the grevalence of fluorosis was high in Weuer country. The prevalence of fluorosis dental caries in Weuer students were significantly higher than those in Han students. It showed no significant different between the group of fluorosis and the group of non-fluorosis in the prevalence of dental caries, perhaps due to the high fluorine intake, poor oral hygiene, and unqualified medical service.
authors.affiliation: Department of Dentistry, Wensu People's Hospital, Xinjiang 843100, China.
authors.forename: H
authors.initials: H
authors.lastname: Cheng
authors.forename: A X
authors.initials: AX
authors.lastname: Liang
authors.forename: A
authors.initials: A
authors.lastname: Elly
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Ling
authors.forename: C R
authors.initials: CR
authors.lastname: Li