齲蝕予防填塞法の前処理におけるほうろう質の溶解性と接着性とに関する研究
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概要
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For the purpose of elongation of the effective period of the caries preventive sealing with Ethyl-2-cyanoacrylate and Poly-methylmethacrylate, it is necessary to improve the adhesion of the sealing material to the enamel surface. There have been reports on pre-treatment of the enamel with phosphoric acid as a possible means of improvement. However, because the enamel to he treated is a healthy enamel, it is necessary to give sufficient consideration to injuries that might occur to the enamel.<BR>This study, therefore, was performed to obtain basic knowledge concerning solubility and adhesion of the enamel surface after the application of varying agent.<BR>Materials and methods: Fifteen kinds of water soluble acid were chosen as agents, and solutions of seven concentrations of each agent were used in this experiment. The solubility was tested with the enamel tablets devised by the author and his co-workers, and adhesion tests were performed on the labial surfaces of extracted upper central incisors. Furthermore, electron-microscopical observation was made on the treated enamel surface.<BR>Results: Solubility and adhesion of the enamel under the solutions of different concentrations of the same agent: both the solubility and the adhesion increased with the increase in the concentration, reached their peaks at a certain concentration, and turned to decrease with the further increase in the concentration, showing similar curves. It became evident that the greater the solubility of the enamel, the stronger the adhesion; likewise, the smaller the solubility, the weaker the adhesion.<BR>In the cases of treatment with various kinds of agents, the relation between the solubility and adhesion of the enamel shows a remarkable variety, suggesting the existence of an agent which may combine minimum solubility and maximum adhesion of the enamel. It was also observed that the shape of the dissolved enamel surface had a great relation to its adhesion.
- 有限責任中間法人 日本口腔衛生学会の論文