Abstract
The general physical and dental features of cleido-cranial dysostosis have been reported. The diagnosis, treatment and histological findings of supernumerary teeth of a patient with cleido-cranial dysostosis is presented. Cellular cementum was much less in a impacted tooth than in erupted supernumerary teeth. The impacted tooth had some deep fissures at occlusal surface of enamel. One of the erupted teeth had evident dysplasia, which is divided into two dentine and pulp.
