Cu²⁺/H₂O₂を利用した根管洗浄の基礎的研究

―硝子状構造物の色素浸透阻止効果―

抄録

Abstract : In the previous study, we reported that the hyaloid structure was formed on the smear layer which irrigated by Cu²⁺/H₂O₂ mixed solution. However clinical meaning of the hyaroid structure has not been clarified yet. In this study, we performed the dye penetration test on the root dentin with the formed hyaroid structure. Dye penetrated to 0.92±0.34 mm in the without smear group, and 0.46±0.24 mm in the smear layer group. When the smear layer was irrigated by 1 mM CuCl₂ solution for 1 min, 3 min and 5 min, the dye penetrated to 0.27±0.11 mm, 0.29±0.08 mm and 0.33±0.21 mm, respectively. Also, when the smear layer was irrigated by 1 mM CuCl₂ and 1 M H₂O₂ mixed solution for 1 min, 3 min and 5 min, the dye penetrated to 0.11±0.05 mm, 0.15±0.07 mm and 0.16±0.12 mm, respectively. There was significant difference between the without smear layer group and the smear layer group. There was no significant difference for the irrigation time in 1 mM CuCl₂ solution or 1 mM CuCl₂ and 1 M H₂O₂ mixed solution. However, there was no significant difference between the smear layer group and the irrigated by 1 mM CuCl₂ solution for 5 min, and between the irrigated by 1 mM CuCl₂ solution for 1 min and the irrigated by 1 mM CuCl₂ and 1 M H₂O₂ mixed solution for 3 min. It is suggested that 1 to 3 min irrigation by 1 mM CuCl₂ and 1 M H₂O₂ mixed solution is the most effective agent for preventing dye penetration.