Abstract
Oral examinations were made at the first visit for a total of 60,647 child patients (31,233 boys and 29,414 girls). Through visual and/or x-ray examinations,900cases with supernumerary teeth in the maxillary incisor area were found (the incidence of 1.48%).
Analyses of the 682 cases were made regarding the number of patients examined, the number of supernumerary teeth, the frequency of the occurrence according to developmental stages, and the eruption patterns.
The results were as follows.
1. The number of patients with supernumerary tooth/teeth
1) 682 pationts consisted of 505 boys (74.05%) and 177 girls (25.95%), an the sex ratio was 1: 0.35 favoring males.
2) 522 (76.54%) of 682 cases had a single supernumerary tooth, and 160(23.46%) had multiple supernumerary teeth, and the ratio was 1: 0.31 in favor of a single supernumerary tooth.
3) 377 (72.22%) of 522 cases with a single supernumerary tooth were male, and 145 (27.78%) of 522 were female, and the sex ratio was 1: 0.38 favoring the males.
4) 128 (80.00%) of 160 cases with multiple supernumerary teeth were male, and 32 (20.00%) of 160 were female, and the sex ratio was 1: 0.25 favoring males.
