Marginal Leakage of Endodontic Temporary Restorative Materials around Access Cavities Prepared with Pre-Endodontic Composite Build-Up: An In Vitro Study
Marginal Leakage of Endodontic Temporary Restorative Materials around Access Cavities Prepared with Pre-Endodontic Composite Build-Up: An In Vitro Study
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DOI：
10.3390/ma13071700
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发表时间：
2020-04-01
期刊：
影响因子：
3.4
通讯作者：
Muramatsu, Takashi
中科院分区：
文献类型：
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作者：
Kameyama, Atsushi;Saito, Aoi;Muramatsu, Takashi
本研究旨在检查各种商业临时修复材料与暴露的牙本质/组合复合材料之间的边缘密封性。将60颗牛切牙在牙骨质-釉质交界处上方切开，去除一半牙本质形成台阶，使用可流动树脂复合物建立台阶。冲洗根管，用氢氧化钙填充，并使用六种临时密封材料（液压临时修复材料，临时封闭材料，氧化锌丁香酚水门汀，玻璃离子水门汀，自固化树脂基临时修复材料，光固化树脂基临时修复材料）中的一种进行密封（每种材料n = 10）。将样品热循环500次并浸入亚甲蓝水溶液中。2天后，沿牙齿的长轴沿着切割它们，并在牙本质侧和构建的复合材料侧测量染料渗透的深度。对于根管预备树脂复合物的边缘，两种树脂基临时修复材料显示出良好的封闭性。水硬性临时修复材料具有中等的封闭效果，氧化锌丁香酚水门汀和玻璃离子水门汀的封闭效果较差。
This study aimed to examine the marginal seal between various commercial temporary restorative materials and exposed dentin/built-up composite. Sixty bovine incisors were cut above the cemento-enamel junction, and half of the dentin was removed to form a step, which was built up using flowable resin composite. The root canals were irrigated, filled with calcium hydroxide, and sealed using one of six temporary sealing materials (hydraulic temporary restorative material, temporary stopping material, zinc oxide eugenol cement, glass-ionomer cement, auto-cured resin-based temporary restorative material, and light-cured resin-based temporary restorative material) (n = 10 for each material). The samples were thermocycled 500 times and immersed in an aqueous solution of methylene blue. After 2 days, they were cut along the long axis of the tooth and the depth of dye penetration was measured at the dentin side and the built-up composite side. For the margins of the pre-endodontic resin composite build-up, the two resin-based temporary restorative materials showed excellent sealing. Hydraulic temporary restorative material had a moderate sealing effect, but the sealing effect of both zinc oxide eugenol cement and glass-ionomer cement was poorer.