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龋齿是儿童少年时期常见的多发病。国内报道学龄前儿童乳牙龋患率高达80～95%,中学生恒牙龋患率达30～40%(1),上海报道儿童龋齿发病率为60～80%,北京小学生为82.4%(2)。在国外,西德报道中欧国家小学生龋患高达98%,Finn报道美国儿童为90%,日本儿童为80%,英国则高达95%(3)。所以世界卫生组织将龋齿列为仅次于癌症、心血管疾病的第三位疾病(4),可见开展防龋工作的重要性与迫切性。
Dental caries is a common and frequently occurring disease in children and adolescents. The prevalence rate of deciduous teeth caries in preschool children in China is as high as 80-95%. The prevalence of caries in secondary school students is 30-40% (1). The prevalence of dental caries is 60-80% in Shanghai and 82.4% in Beijing primary school students (2). Abroad, West Germany reported caries rates of up to 98% of pupils in Central European countries. Finn reported that 90% of U.S. children, 80% of Japanese children, and 95% of UKs (3). Therefore, WHO ranked caries as the third disease after cancer and cardiovascular disease (4), demonstrating the importance and urgency of caries prevention.