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A Study on Minor Anomalies in the Oral Region

In children with congenital anomalies, minor anomalies may often occur in their oral regions. This is more so in children with Down’s syndrome. But tooth anomalies in children with Down’s syndrome at their deciduous tooth stage have been little known. In this study, the authors examined the incidence of tooth anomalies in a group of 108 children with Down’s syndrome at their deciduous tooth stage, compared it with that in the group of 16,233 twoyear-old children dealt with in our previous report and obtained the following results : 1) In the incidence of tooth anomalies at the deciduous tooth stage, a marked difference was noted between children with Down’s syndrome at 61.1 1 % and normal children at 6.22%. 2) In terms of the form of anomaly, fused teeth were seen at the highest rate of incidence in normal children, whereas the incidence of missing teeth was the highest in children with Down’s syndrome.