Becker S A, von Fraunhofer J A
J Endod. 1989 Jun;15(6):246-8. doi: 10.1016/S0099-2399(89)80217-1.
This study compares the in vitro apical seal achieved with thermoplasticized gutta-percha used with and without a sealer cement and that achieved with dental amalgam and a varnish liner following an apicoectomy and a Class I preparation of single root teeth. The teeth were immersed in methylene blue dye for 10 days, were sectioned longitudinally, and the amount of leakage was determined. No difference in leakage was found between the apical seals achieved with thermoplasticized gutta-percha used with a sealer cement and that obtained with dental amalgam with varnish. The leakage found with thermoplasticized gutta-percha used without a sealer cement was significantly greater.
本研究比较了在单根牙进行根尖切除术和Ⅰ类洞预备后，使用和不使用封闭剂的热塑牙胶所获得的体外根尖封闭效果，以及使用银汞合金和清漆衬层所获得的根尖封闭效果。将牙齿浸入亚甲蓝染料中10天，进行纵向切片，并测定渗漏量。使用封闭剂的热塑牙胶所获得的根尖封闭与使用银汞合金和清漆所获得的根尖封闭之间，在渗漏方面未发现差异。未使用封闭剂的热塑牙胶所发现的渗漏明显更大。
