title: [Epidemiological investigation on periodontal condition of population in Qinghai province].
abstract: OBJECTIVE
  To describe the periodontal condition of population in Qinghai province and provide basic data for the diseases prevention.
  
  
  METHODS
  Referring to the guideline for the third national oral health survey, the method of multistage, stratified, equal capacity, simple random sampling was carried out in population of 12, 35-44, and 65-74 years old in Qinghai province. Gingival bleeding, calculus, periodontal pocket and loss of attachment of population were investigated.
  
  
  RESULTS
  1) In 12, 35-44, 65-74 age groups, the prevalence of gingival bleeding was 98.74%, 97.84%, 92.23%, the prevalence of calculus was 89.76%, 99.87%, 92.87%. 2) In 35-44 age group, the prevalence of shallow periodontal pocket was 34.64%, the prevalence of deep periodontal pocket was 5.58%. In 65-74 age group, the prevalence of shallow periodontal pocket was 50.45%, the prevalence of deep periodontal pocket was 13.12%. 3) In 35-44 age group, the prevalence of 4-5, 6-8, 9-11, 12 mm or more loss of attachment was 40.74%, 18.78%, 4.82%, 1.78%. In 65-74 age group, the prevalence of 4-5, 6-8, 9-11, 12 mm or more loss of attachment was 71.21%, 51.34%, 20.51%, 7.01%.
  
  
  CONCLUSIONS
  The oral health condition of population in Qinghai province is very poor. The periodontal pocket and loss of attachment was severely. The disease prevention should be strengthen in Qinghai province.
authors.affiliation: Dept. of Stomatology, Qinghai Provincial People's Hospital, Xining 810007, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Hu