コンポジットレジンの歯髄刺激に関する実験的研究 : 歯髄の修復能に与える影響
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Restoration of tooth with composite resin filling may cause pulpal damage. Recently, some causes are mentioned in reports : (1) chemical irritation by composite resin, (2) bacterial infection, (3) interaction between bacterial and chemical irritation, and (4) microleakage of margin, etc. Real cause however has not yet been established. With a view to clarifying the cause of pulp damage induced by composite resin filling, maxillary 1 st molars of Wistar SPF rats were used for histological examination in this study. This experiment is divided into five groups and performed under the condition of maximum prevention of bacteria and marginal leakage : (1) EZ group : mesial surface of the tooth was filled with zinc oxide eugenol cement and sacrificed after two weeks, (2) CR group : mesial surface of the tooth was filled with composite resin and sacrificed after two weeks, (3) CR-P group : mesial surface of the tooth was filled with composite resin. At two weeks when the pulp was thought to be healing, calcium hydroxide pulpotomy was performed, (4) NO-P group (control group) : calcium hydroxide pulpotomy only, and (5) EZ-P group (control group) : calcium hydroxide pulpotomy followed by zinc oxide eugenol cement filling (mesial surface) two weeks later. The rats of (3), (4) and (5) were sacrificed at 1-week, 2-week and 4-week postoperatively. The results demonstrated that the dentin bridge formation in the teeth filled with composite resin was poor as compared with the controls. Thus, it is suggested that the composite resin restoration may reduce the pulp potential of dentin bridge formation.
- 九州歯科学会の論文
- 1994-02-25
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関連論文
- 歯髄の修復能に与える修復材料の影響
- 九州歯科大学附属病院第 1 歯科保存部を受診した初診患者の調査 : 主に再治療の割合について(1991 年度∿1993 年度)
- コンポジットレジンの歯髄刺激に関する実験的研究 : 歯髄の修復能に与える影響 : 主論文の要旨
- コンポジットレジンの歯髄刺激に関する実験的研究 : 歯髄の修復能に与える影響