根管洗浄剤の根元象牙質への拡がり

Spreading of root canal irrigants on root dentine.

抄録

本研究の目的は，ヒトの根元の象牙質における根管洗浄剤の拡がりを評価することである。様々な条件の溶液で前処理を行った後，象牙質表面での様々な溶液の拡がりを測定した。条件液-試験液の組み合わせにより，7つの実験群を設定した：非-蒸留水，非-6％次亜塩素酸ナトリウム（NaOCl），非-14.3％エチレンジアミン四酢酸（界面活性剤0.084％セトリミド（Morhonine）を含む），NaOCl-NaOCl，NaOCl-Morhonine，Morhonine-Morhonine，Morhonine-NaOCl。0.1mLのコンディショニング液を60秒かけて塗布した後，0.5μLの試験液を象牙質表面に置いた。試験液の広がりを480秒間測定し，接触面積比の大きさを調べた。300秒後の測定値をFisher's Protected Least Significant Difference（P＜0.05）を用いて群間比較した。その結果，Morhonine-NaOClの接触面積比は，すべての実験群の中で最も有意に増加した。

The purpose of this study was to evaluate the spreading of root canal irrigants on human root dentine. The spreading of various solutions on dentine surfaces was measured after pre-treatment with various conditional solutions. Seven experimental groups were set based on the combination of conditioning solution-test solution: none-distilled water; none-6% sodium hypochlorite (NaOCl); none-14.3% ethylenediaminetetraacetic acid containing surfactant 0.084% cetrimide (Morhonine); NaOCl-NaOCl; NaOCl-Morhonine; Morhonine-Morhonine and Morhonine-NaOCl. After application of 0.1 mL of conditioning solution for 60 s, 0.5 microL of test solution was placed on dentine surfaces. Spreading of test solution was measured for 480 s to examine the size of the contact area ratio. Those at 300 s were compared among groups using Fisher's Protected Least Significant Difference (P < 0.05). It was concluded that the contact area ratio of Morhonine-NaOCl increased the most significantly among all the experimental groups.