Abstract: Objective To evaluate the prevalence and distribution of fused teeth in primary dentition of preschoolers in Kunming. Methods: 3116 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 3116 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 unilaterally(83.53％). Of the 99 fused teeth, 7 (17.17)％was accompanied with caries, without predilection between left and right side. Conclusion 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.

Key words: fused teeth, preschool children, primary dentition