我们于1993年4月对寄宿制的陕西省西安幼儿园进行了普查。该园从中班(4岁)儿童起,每晚刷牙一次。每学期开学时进行一次口腔检查,发现儿童患龋时即通知家长领至相应医院进行治疗和处理。普查对象为园内3～5周岁学龄前儿童484人。按年龄分为3岁、4岁、5岁三组。在自然光线下,由口腔科医师进行检查。凡检出龋齿或充填牙齿者均为龋齿阳性。 We conducted a census of the boarding system of Xi'an Kindergarten in Shaanxi Province in April 1993. The park starts with children of middle class (4 years old), brushing their teeth once a night. Each semester to conduct a dental examination at the beginning of the semester, found that children suffering from caries notify parents to the appropriate hospital for treatment and treatment. Census for the Park for 3 to 5 years old preschool children 484 people. By age divided into 3-year-old, 4-year-old, 5-year-old three groups. Under natural light, the dentist checks. All cases of dental caries or dental caries were positive for dental caries.