透明標本による各種根管充填剤の観察ならびに封鎖性の評価
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概要
- 論文の詳細を見る
The success of endodontic treatment depends on the performance of root canal sealing. Guttapercha is the most widely used root canal filling material at present. It can be used as a master point surrounded by laterally condensed accessory points with canal sealer. It is condensed vertically with pluggers by heating or utilizing some solvents such as chloroform. Dye penetration methods have been mostly employed for studying the root canal sealing by various techniques. In the dye penetration studies, the interface between the filled material and the root canal wall is observed in cross sections or the filled material is stereoscopically observed by transparentizing the tooth structure. However, there are some difficulties in these investigations such as color diffusion into the tooth and material or dissolution of the tooth apical structure. The author developed an agent useful for transparentizing the tooth structure. The agent was prepared by dissolving citric acid in 10% formaldehyde solution to make 80% citric acid solution and then adding liquefied phenol. When the tooth was immersed in this agent at 37℃ for a period, it became completely transparent. Thus, this treatment was extremely effective for stereoscopically observing the surface of the filled material through the tooth structure. It was also found that the blue black ink (Pilot Co.) was a useful penetration dye. It would quickly penetrate into the interface between the filled material and the root canal wall without affecting the quality or color of guttapercha. The observations of these new methods showed that the sealing ability was significantly higher in the apical seat prepared root canal than in the non-prepared canal regardless of the filling technique used. In the 'sealer and guttapercha point group', only the sealer was observed in the apical portion, and in the middle portion the master and accessory points were coalesced together having some of the spot or island-like sealer. In the 'chlorpercha and guttapercha point group', the combination method of lateral and vertical condensation showed significantly favorable results.
- 九州歯科学会の論文
- 1988-10-25