Push-out strength and SEM evaluation of resin composite bonded to internal cervical dentin.
Push-out strength and SEM evaluation of resin composite bonded to internal cervical dentin.
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DOI：
10.1111/j.1600-9657.1996.tb00520.x
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发表时间：
1996-10
期刊：
影响因子：
--
通讯作者：
J. Patierno;F. Rueggeberg;Rob Anderson;R. Weller;D. Pashley
中科院分区：
文献类型：
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作者：
J. Patierno;F. Rueggeberg;Rob Anderson;R. Weller;D. Pashley
使用直接或间接放置技术评价了与双重固化牙本质粘结系统一起使用的树脂复合材料与牛颈内牙本质的粘结强度。将牙齿横向切片以产生4 mm厚的样本。根管扩大到一个标准化的锥度，用牙本质粘接系统处理，并使用直接，增量复合材料放置或间接复合材料放置的预聚合复合嵌体填充光固化树脂复合材料。使用复合材料嵌体间接放置的牙列的脱粘应力为8.5（SD +/- 2.7）MPa，显著大于（p < 0.0001）以传统增量方式放置的复合材料的5.0（SD +/- 1.9）MPa值。SEM评价显示，与直接技术相比，间接放置技术显示出树脂标签密度和长度增加。通过使用复合嵌体技术，而不是直接的，增量的材料积累，获得了增强的树脂复合材料的固位与牙本质粘结系统处理牙髓准备牙本质。
The bond strength of a resin composite used with a dual-cured dentin bonding system to internal cervical bovine dentin was evaluated using a direct or indirect placement technique. Teeth were sectioned transversely to produce 4 mm-thick specimens. The root canals were enlarged to a standardized taper, treated with a dentin bonding system, and filled with a light-cured resin composite using either direct, incremental composite placement or indirect composite placement of a pre-polymerized composite inlay. The debond stress of indirectly placed restorations using a composite inlay was 8.5 (SD +/- 2.7) MPa which was significantly greater (p < 0.0001) than the value of 5.0 (SD +/- 1.9) MPa for composite placed in a conventional, incremental manner. SEM evaluation revealed the indirect placement technique demonstrated increased resin tag density and length as compared to the direct technique. Enhanced retention of resin composite to endodontically prepared dentin treated with a dentin bonding system was obtained by using a composite inlay technique as opposed to direct, incremental buildup of the material.