Kataoka H, Yoshioka T, Suda H, Imai Y
Department of Endodontics, Faculty of Dentistry, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
J Endod. 2000 Apr;26(4):230-5. doi: 10.1097/00004770-200004000-00009.
The aims of this study were to find a dentin bonding system suitable for root canal treatment using a newly developed root canal resin sealer, and to examine its sealing ability. The sealer was composed of vinylidene fluoride/hexafluoropropylene copolymer, methyl methacrylate, zirconia, and tributylborane catalyst. The effects of dentin conditioners and primers on dentin bonding were studied by tensile bond strength testing and scanning electron microscopy. Apical and coronal leakage were evaluated at 1-, 4-, and 12-wk intervals by a dye penetration test using a methylene blue solution. Pulp Canal Sealer EWT and Sealapex were used as controls. Significantly high bond strength was obtained by treating dentin with EDTA, followed by application of a glutaraldehyde/2-hydroxyethyl methacrylate primer. The experimental resin sealer produced a significantly superior coronal seal at 12 wk when compared with the two control sealers (p < 0.05). Scanning electron microscopic examination revealed few gaps at the resin sealer-dentin interface.
本研究的目的是找到一种适用于使用新开发的根管树脂封闭剂进行根管治疗的牙本质粘结系统，并检测其封闭能力。该封闭剂由偏二氟乙烯/六氟丙烯共聚物、甲基丙烯酸甲酯、氧化锆和三丁基硼烷催化剂组成。通过拉伸粘结强度测试和扫描电子显微镜研究了牙本质调节剂和底漆对牙本质粘结的影响。使用亚甲蓝溶液通过染料渗透试验在1周、4周和12周的间隔评估根尖和冠部渗漏情况。使用牙髓根管封闭剂EWT和Sealapex作为对照。用乙二胺四乙酸处理牙本质，然后应用戊二醛/甲基丙烯酸2-羟乙酯底漆可获得显著高的粘结强度。与两种对照封闭剂相比，实验性树脂封闭剂在12周时产生了显著更好的冠部封闭效果（p < 0.05）。扫描电子显微镜检查显示树脂封闭剂与牙本质界面处的间隙很少。
