病例选择在泰安市中心医院 1998年 1月到2 0 0 0年 1月 652名 2～ 4岁儿童 ,其中男 334例 ,女318例。龋齿的诊断标准 :1浅龋 :病变局限于牙釉质或牙骨质。表现为釉质出现褐色或黑色斑点或斑快 ,表面粗糙。 2中龋 :龋坏已达到牙本质 ,形成牙本质浅层龋洞 ,对冷水、冷气、酸甜食? Case selection in Tai’an Central Hospital from January 1998 to January 2000 652 2 to 4 years old children, including 334 males and 318 females. Caries diagnostic criteria: a shallow caries: lesions limited to enamel or cementum. The performance of enamel appear brown or black spots or spots fast, rough surface. 2 caries: caries has reached dentin, the formation of dentinal shallow cavities, cold water, air conditioning, sour sweet?