Regional odontodysplasia: a case report.

This patient presents with a regional odontodysplasia in the mixed dentition with the upper right quadrant being affected from the anomaly. The upper right first primary molar was extracted because of a periapical abscess and examined scanning electron microscopically. The aim of this article is to discuss the clinical and ultrastructural features of the anomaly and revise the other odontodysplasia cases reported in the literature.