关键词: 龋病, 龋均, 牙周, 流行病学调查, 学生

Abstract:

Objective    To assess the prevalence and distribution of caries and periodontal disease among 15-year old students in Dalian Development Area， and provide the foundation for prevention and treatment strategies of caries and periodontal disease. Methods    Using the multiple - phase-proportional - random sampling survey， 480 students aged 15 were sampled， with 240 boys and 240 girls respectively. The data were collected by oral examination according to the guideline for the Epidemic Survey Scheme of 3rd National Oral Health. Prevalence of caries and mean DMFT、the filling percentage rate and the detection rate of calculus and gingival bleeding、periodontal pocket were used as the statistic index and SPSS12 . 0 was chosen for the statistical analysis. Results    The prevalence rate of dental caries was 55.41% with the mean DMFT being 1.49 and the filling percentage rate being 26.19% for permanent teeth among 15-year- old students in Dalian Develoment Area. There were significant differences between two genders on mean DMFT and the prevalence rate of caries as well （P < 0.05）. The detection rate of gingival bleeding was 31.88%， and the mean number of areas was 0.49. The detection rate of calculus was 74.58%， and the mean number of areas was 1.57. The detection rate of periodontal pocket was 2.50%. A significant difference could be seen between two genders on proportion of calculus （P < 0.01）. Conclusion    The prevalence rate of dental caries is high with the caries filling rate being at low level. and the status of periodontal health is weak. We should reinforce the oral health care and develop oral health care service in order to improve the oral health among 15- year old students in Dalian Develoment Area.

Key words: dental caries；DMFT；periodontal；epidemiological investigation；students