Abstract
1. A case of dens in dente in the left maxillary lateral incisor was found by chance in the panoramic radiographs in a girl,9 years 4 months old.
2. A radiolucent area extending linearly from the third of the mesial side of the incisal edge of the crown into the pulp cavity was revealed in radiographic findings. A long its periphery, funnel-shaped radio opacity appearing to be dens in dente was recognized. In comparison with 2, the pulp cavity was considerably larger and the radiolucency was accentuated. It was an immature tooth with delayed apexification.
3. Based in the histopathological findings, we discovered that vacuolar degeneration and atrophy were significant in the odontoblast layer, and significant reticu lar atrophy and regressive changes were observed in the dental pulp. Both enamel and dentin, inside and outside, showed about the same degree of calcification.
