目的:了解乌鲁木齐市7~9岁儿童患龋状况.方法:采用多阶段、分层、整群抽样法,随机抽取乌鲁木齐市5所学校3204名儿童,检查第一恒磨牙的萌出率及乳磨牙和第一恒磨牙的患龋情况,并对不同性别、年龄、民族的患龋情况进行对比分析.结果:第一恒磨牙总患龋率为20.19%,龋均0.55;汉族(21.94%)高于其他民族(18.06%)(P<0.05);患龋率随年龄增长呈上升趋势.乳磨牙患龋率为83.46%,龋均4.60,与第一恒磨牙患龋率呈显著正相关性[OR=3.818,95% CI(2.712,5.376),P<0.05].第一恒磨牙未萌出率为12.86%,窝沟封闭率为6.3%,龋充填率为7.6%;其中未萌出率汉族(16.37%)高于其他民族(8.58%)(P<0.05).结论:乌鲁木齐市7~9岁儿童患龋率较高,窝沟封闭率和龋充填率较低.%AIM:To investigate the prevalence of dental caries, the eruption and caries prevention of the first permanent molars in children aged 7~9 years in Urumqi. METHODS:A multi-stage,cluster sampling method was used.3 204 children aged 7~9 years were randomly selected from 5 schools in Urumqi. The eruption and dental caries of the first permanent molars and deciduous molars were investigated. The relationship of caries prevalence with gender,age and nationality was analyzed. RESULTS:The total caries prevalence rate of the first permanent molar was 20.19%,the mean caries was 0.55; the caries prevalence of Han nationality was higher than that of other ethnic groups (P<0.05),and the caries prevalence was increasing with age. The caries prevalence rate of deciduous molars was 83.46%,and the mean caries was 4.60,which was positively correlated with the caries of the first permanent mo-lar[OR=3.818,95% CI(2.712,5.376),P<0.05]. The rate of eruption of the first molar was 12.86%, the rate of pit and fissure sealing rate was 6.3%,and the rate of caries filling was 7.6%. The caries filling rate of Han nation-ality was higher than other ethnic groups(P<0.05). CONCLUSION:Caries prevalence of children aged 7~9 years in Urumqi is high. The rate of pit and fissure sealing and the rate of caries filling are low. It is necessary to strengthen the early health propaganda and guidance of oral health care.
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