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1989年6月,上海市普陀区牙防所对某幼儿园中班117名幼儿进行调查,结果105名幼儿患龋齿,占75.23%;1990年6月对全园222名幼儿调查,患龋齿者119名,占53.6%;1990年9月对新中班进行口腔卫生调查,调查人数为80名,发现早晨起床不刷牙的有4名,占5%;临睡前不刷牙的有57名,占71.3%;临睡前进食的有16人,占20%。这80名幼儿中患龋齿的有31名,占38.8%。 6周岁以下的幼儿口腔里基本上都是乳牙,仅有部分幼儿第一恒磨牙已经萌出。幼儿爱吃甜食,实验证
In June 1989, a survey of 117 children from a middle school in a kindergarten was conducted by the Dental Prevention Institute of Putuo District in Shanghai. As a result, 105 children were diagnosed with dental caries, accounting for 75.23% of the total; 222 children aged 222 Name, accounting for 53.6%. In September 1990, an oral hygiene survey was conducted on the new middle school with a survey population of 80 and found that 4 people did not brush their teeth in the morning, accounting for 5%; 57 were not brushing before going to sleep, accounting for 71.3%; before going to sleep eating 16 people, accounting for 20%. There were 31 dental caries in these 80 children, accounting for 38.8%. Children under the age of 6 basically have primary teeth in their mouths, and only some of the children's first permanent molars have erupted. Toddler love sweet food, experimental evidence