A case of dentin dysplasia type I (radicular) is described. The practitioner should be aware that several periapical radiolucent areas may occur. If periodontal communication occurs, infection follows. Because of the abnormal anatomic configuration of pulp chambers and root canals, endodontic treatment may not be feasible. The shortened roots may also allow hypermobility and spontaneous exfoliation at an early age. Such patients may be doomed to prosthetic replacements. Well-fitting, esthetic appliances are essential for appearance and function.