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1龋齿的发病原因是什么？龋齿的发生与以下四个因素有密切的关系：（1）细菌的作用：主要是变形链球菌；（2）牙齿的条件：有明显的解剖缺陷，如较深的窝为或牙釉质发育不全；（3）食物残渣的存在；（4）时间：以上情况长时间存在就会增加发生龋齿的机会。2如何预防龋齿发生保
1 What is the cause of dental caries? The occurrence of dental caries and the following four factors are closely related: (1) the role of bacteria: mainly Streptococcus mutans; (2) the conditions of teeth: there are obvious anatomical defects, such as deep nest or enamel hypoplasia ; (3) the presence of food debris; (4) Time: The above situation will increase the chance of occurrence of dental caries. 2 how to prevent dental caries occurred Paul