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朴淑衡,曺圭澄 慶北大學校 齒科大學 1990 慶北齒大論文集 Vol.7 No.1
The purpose of this study was to observe the pH level changes of several canal sealers after root canal obturation. Eighty root canals of extracted human anterior teeth were prepared by step-back method and obturated with laterally condensed gutta-percha combined with Z. O. E., Tubli-Seal, NOgenol, Sealapex, FR, AH-26, Diaket separately and then immersed in a plastic bottle containing distilled water of pH 7. The pH levels of the solution were determined at 1 day, 3 days, 5 days, 1 week and 2 weeks after storing in water bath of 37℃. The results were as follows: The pH levels of the Sealapex solution were significantly higher than those of all the other solutions at the 1 day and the 3 days(p<0.01), but there was no significant differences between the other groups(p>0.05). The pH levels of the Sealapex solution were significantly higher than those of Z. O. E., NOgenol and AH-26 solutions at the 5 days(p<0.05), but there was no significant differences between the other groups(p>0.05). There was no significant differences between the pH levels of the Sealapex solution with time elapse from 1 day to 2 weeks (p<0.05). J. Kyungpook Univ. Sch. Dent. Vol. 7, No. 1,135∼143,1990