Objective To evaluate the prevalence and distribution of fused teeth in primary dentition of preschoolers in Kunming. Methods 3 1 16 children aged from 3 to 6 years old were randomly enrolled in a cross-sectional study.Fused teeth were assessed through visual examinations.Results Among the 3 1 16 subjects,a total of 85 individuals(2.73%)presented with fusion of primary teeth without sex predilection.The fused teeth were typically located in the lower anterior region(89.41 %),and mainly occurred unilat-erally(83.53%).Of the 99 fused teeth,7 (17.17%)was accompanied with caries,without predilection between left and right side. Conclusions A certain number of children suffer from fused teeth,which may cause series of complications,and pediatric dentists should pay more attention to fused teeth.%目的：了解昆明地区乳牙融合牙的发生情况及分布特点。方法采用横断面研究方法，随机对3116名3～6岁儿童进行口腔检查及记录。结果3116名儿童中乳牙融合牙发生率为2．73％，男女性别之间无统计学差异；在85例融合牙患儿中，76例（89．41％）发生于下颌，71例（83．53％）发生于单侧，14例（16．47％）两侧均有融合牙，且为对称性分布；在99颗融合牙中，16例（16．16％）发生龋坏，左右两侧发生率无统计学差异。结论乳牙融合牙有一定的发生率，好发于下颌前牙区，儿童口腔科医生应给予重视并密切观察，及时防治因乳牙融合继发的牙体牙髓、根尖周疾患，以及错牙合畸形等，将乳牙融合牙对儿童口颌系统的危害降至最低。
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