乳歯根管充填材料が歯根膜および後継永久歯歯胚に及ぼす影響に関する実験的研究
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概要
- 論文の詳細を見る
Effect of deciduous root canal filling materials, Calvital, Vitapex, Kri I, Neodyne and FR, on the periodontal membrane and succeeding permanent tooth buds was investigated histopathologically with use of young dogs about three months old. The results were as follows : 1. The subjects treated with Calvital showed almost no inflammatory changes in the apical periodontal membrane of deciduous teeth. However, Vitapex, Kri I, Neodyne and FR caused inflammatory changes. 2. Resorption of deciduous root was delayed in all the subjects treated by root canal filling, in comparison with controls. In the subjects treated with Vitapex or Neodyne, bony ankylosis of the deciduous root and alveolar bone was observed. 3. With regard to changes in succeeding permanent tooth buds, no changes in the cells of enamel organ were observed in the subjects treated with Calvital. With Vitapex and FR, changes such as flattening, fusion, lytic changes, irregular arrangement, and atrophy were observed in the cells of enamel organ when the filling materials extravasated. With Kri I, the cells of enamel organ showed flattening and atrophy. With Neodyne irregular arrangement and atrophy of the cells of enamel organ were observed. 4. In comparison with controls, eruption of permanent teeth was delayed owing to inflammatory chages caused in the periodontal membrane, delayed resorption of deciduous roots, and changes in the cells of enamel organ. 5. With Vitapex and Neodyne, bony ankylosis in particular was seen and disturbance in eruption of permanent teeth was observed. 6. Calvital, FR, Vitapex, Kri I, and Neodyne, in the descending order, affected the periodontal membrane and the cells of enamel organ of succeeding permanent teeth buds. 7. Use of deciduous root canal filling materials in treatment of non-infected root canals greatly affect the periodontal membrane and succeeding permanent tooth buds when they are applied to immature teeth or when they extravaste beyond the apical foramen.
- 九州歯科学会の論文
- 1986-12-25