Abstract
Two patients were diagnosed as having odontodysplasia at the pediatric dental clinic of Tsurumi University Dental Hospital. The process of the clinical approach, X-ray examinations and histological features of the affected teeth were presented. The results obtained were as followes:
1) In the first case, odontodysplasia was observed at region _??__??__?a?n_d in the second case at regions _??__??__??_ and _??__??__??_.
2) Developmental disturbances and hypocalcification of the enamel and dentin were found in both cases.
3) Histological findings revealed disarrangement of dentinal tubules in the coronal mantle dentin, but those of the radicular dentin appeared to be rather normal.
