编辑同志: 我的孩子今年四岁,不知为什么,他的一口乳牙长得稀疏、细小。请问,以后换的恒牙会不会和乳牙一样呢? 江苏满新满新同志: 乳牙长得稀疏、细小是由于牙齿发育不良。首先要考虑遗传因素,孩子父母的家族中有没有类似的情况。因为牙齿的形态、排列、位置等都和人的其它部分一样,有明显的遗传因素。其次,母亲在孕期有营养不良、传染病、内分泌 Editor’s Comrade: My child is four years old. I do not know why. His teeth are sparse and small. Excuse me, after changing permanent teeth will be the same as the primary teeth? Jiangsu full new Comrades: Teeth grow sparse, small is due to dental dysplasia. First of all, to consider the genetic factors, children’s parents have no similar situation in the family. Because the tooth shape, arrangement, location and other parts of the same people, there are obvious genetic factors. Second, maternal malnutrition during pregnancy, infectious diseases, endocrine