下顎側切歯と下顎犬歯の癒合歯

概要

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We observed four fused teeth of the mandibular lateral incisor and the mandibular canine on three patients. In Case 1, both sides of the teeth were fused to the tooth crown and root. From observation of dental radiography, we were able to confirm that the fusion area of these teeth reached to the dentin. In Case 2, the tooth crown was divided into two parts, mesial and distal, and was fused to the tooth root. From observation of dental radiography, the fusion area of the tooth was confirmed to reach to the dentin. In Case 3, we were able to confirm from observation of plaster model that the tooth crown was fused completely. The appearance rate of fused permanent teeth was 0.3%. We thought that the abnormal cases appeared as a result of many embryological phenomena. We propose that the abnormal cases should be reported along with the detail data, and not thought to be rare.
岩手医科大学歯学会の論文
2004-08-16