本文对西安市４４１９名儿童恒牙龋病的牙面分布特点略加分析。调查对象、内容和方法同前文。结果和讨论１单个牙面占多数（表１、２）儿童恒牙龋病中单个牙面占多数为６８．１８％，比乳牙龋病的单个牙面４８．０８％为高。其中面为绝大多数，其次，颊面＞舌面＞近中面... This article analyzes the distribution of tooth surface features of 4419 children with permanent dental caries in Xi'an. The survey, content and methods with the previous. RESULTS AND DISCUSSION 1 The majority of single tooth surfaces (Table 1, 2) accounted for 68.18% of single tooth surfaces in children with permanent tooth caries, which was higher than 48.08% of single tooth surfaces in primary caries. Among them, the majority of the village faces, followed by the buccal> Tongue> near the middle ...