1986 Volume 11 Issue 2 Pages 121-133
We wish to report on clinical cases of fused and congenitally missing deciduous teeth, which we have dealt with in our pedodontic outpatient clinic in the past eighteen years. The objects of observation were 3,043 children; 1,553 boys and 1,490 girls.
The results were as follows:
1. Fused teeth were observed in 138 children (4.53%) and congenitally missing teeth in 7 children (0.23%). Differences in the frequency of fused teeth was not observed between the sexes.
2. Fused teeth were observed only at the anterior region in the primary dentition, and in 91.72% occurred on the mandibles. Statistically significant differences between the right side and left side were not noted.
3. Fusion of the central and lateral incisors in the mandibles was statistically significant in males.
4. There was a high incidence of bilateral fusion in females.
5. In case of the complete type of fused teeth, all were of the pulp form I type. On the other hand, in the incomplete type almost were of the pulp form Ⅳ type.
6. Aplasia of the successors was observed in 53.7% of all cases; 39.6% in successors of the lower lateral incisor and canine, 7.4% in the lower central and lateral incisors, 6.7% in the upper central and lateral incisors.
7. The successors of congenitally missing deciduous teeth were either missing or fused in all cases.
