The aims are to gather data on caries (tooth decay) prevalence for children under 4 years old and to determine possible associations with infant feeding and oral hygiene habits.

• 四岁以下的儿童是否普遍患有龋齿?本研究收集该方面的资料并寻找龋齿与婴儿期摄取食物方法及口腔卫生习惯之间可能存在的关联。