我园对1989年～1994年出生的幼儿进行了龋齿发病情况的调查,结果见下表。从表中可以看出幼儿4岁左右的龋齿发病率就很高,以1994年出生的幼儿为例,患龋率达半数之多,到7岁左右未患龋齿的幼儿占十分之一也算不错了。龋齿不仅给人带来疼痛,咀嚼困难,还会因此而造成消化道的疾患,甚至引起肾病、心脏病等。幼儿龋齿的发病现状,使我 I park from 1989 to 1994 was born in children were investigated the incidence of dental caries, the results in the table below. It can be seen from the table that the prevalence of dental caries is very high in young children about 4 years old. Taking the children born in 1994 as an example, the caries prevalence rate is as high as one-half as many as one-tenth of those who have no caries at the age of 7 Not bad. Dental caries not only cause pain, chewing difficulties, but also as a result of digestive disorders, and even cause kidney disease, heart disease and so on. The incidence of dental caries in children so that I