Carman J E, Wallace J A
Graduate and Undergraduate Endodontic Program, University of Pittsburgh, School of Dental Medicine, PA 15261, USA.
J Endod. 1994 Dec;20(12):571-5. doi: 10.1016/S0099-2399(06)80078-6.
Ninety-six human molars were accessed. After flattening of the occlusal surface and removal of the apical two-thirds of the roots, the remaining canal space was instrumented by conventional methods. The teeth were divided into six groups of 15 teeth with three positive and three negative controls. The six experimental groups were based on the material used to restore the pulp chamber and remaining canal space: 1, gutta-percha with sealer; 2, amalgam; 3, IRM; 4, light-cured posterior composite; 5, chemical-cured core paste; and 6, light-cured glass ionomer. After placement of the restorative material, the teeth were thermocycled and evaluated for microleakage using 2% methylene blue dye and incremental sectioning. The amalgam and glass ionomer groups showed significantly less leakage than the other materials. The composite, core paste, and IRM did not differ significantly from one another. The gutta-percha with sealer group showed significantly greater leakage than all other groups.
选取了96颗人类磨牙。在磨平咬合面并去除牙根根尖三分之二后，用传统方法对剩余的根管空间进行预备。将牙齿分为六组，每组15颗牙，其中有三个阳性对照组和三个阴性对照组。六个实验组是根据用于修复髓腔和剩余根管空间的材料划分的：1，牙胶尖加封闭剂；2，银汞合金；3，IRM（一种暂封材料）；4，光固化后牙复合树脂；5，化学固化核糊剂；6，光固化玻璃离子水门汀。放置修复材料后，对牙齿进行热循环处理，并使用2%亚甲蓝染料和增量切片法评估微渗漏情况。银汞合金组和玻璃离子水门汀组的渗漏明显少于其他材料组。复合树脂组、核糊剂组和IRM组之间差异不显著。牙胶尖加封闭剂组的渗漏明显多于其他所有组。
