MedGen

A rare ectodermal dysplasia syndrome characterized by the association of sparse, fine, dry, slow growing hair with variable dental abnormalities including oligodontia, peg-shaped incisors, and shell teeth. Mild intellectual disability, microcephaly, and dysmorphic facial features have also been reported. [from ORDO]

The diagnosis odontodysplasia requires clinical and radiological exams, in which unusually large pulp chambers and large pulp room chambers with thin enamel and dentin are visible. It may affect either a single tooth or several teeth. The term regional odontodysplasia is used if several teeth are affected. It affects the deciduous and permanent dentitions in the maxilla, the mandible or both, although the maxilla is more frequently involved. A type of dental dysplasia occurring in dentinogenesis imperfecta in which the pulp chambers are enlarged and there is a reduced amount of coronal dentin. [from HPO]

Dentinogenesis imperfecta, Shields type III (DGI-III) is an autosomal dominant disorder of dentin formation. DGI presents clinically with gray to brownish-blue discoloration of the teeth and rapid attrition of the crowns, which are bulbous. There are no skeletal manifestations. Both deciduous and permanent teeth are affected (summary by MacDougall et al., 1999). [from OMIM]