抄録
Pathological analysis of 50 cases of the epulis with hard tissue formation was performed. The results were as follows:
1. Females were affected more frequently than males; the ratio was 2.3:1 (female: 35 cases; male: 15 cases).
2. The lesion was more common in the third and sixth decades of age, and the mean age was 37.3 years.
3. No predilection was found for the location of the epulis, compared with other nonhard-tissue forming types of the epulis which frequently developed in the front tooth area.
4. Size of the lesion was most often between 1 and 2 cm in diameter.
5. The cases were classified hard tissues into histologically 4 types by i. e. 35 cases of bonelike tissue, 10 cases of mixture of bone-and cementum-like tissues, 2 cases of cementum-like tissue, and 3 cases of dystrophic calcification alone.
6. Hard tissue of all male cases showed bone-like structure. On the other hand, cementumlike tissue was found in female cases only.
