Department of Restorative Dentistry, Dental School, Federal University of Uberlandia, Brazil.
J Appl Oral Sci. 2004 Mar;12(1):45-50. doi: 10.1590/s1678-77572004000100009.
The purpose of this study was to evaluate the influence of different surface treatments on composite resin on the microtensile bond strength to a luting resin cement. Two laboratory composites for indirect restorations, Solidex and Targis, and a conventional composite, Filtek Z250, were tested. Forty-eight composite resin blocks (5.0 x 5.0 x 5.0mm) were incrementally manufactured, which were randomly divided into six groups, according to the surface treatments: 1- control, 600-grit SiC paper (C); 2- silane priming (SI); 3- sandblasting with 50 mm Al2O3 for 10s (SA); 4- etching with 10% hydrofluoric acid for 60 s (HF); 5- HF + SI; 6 - SA + SI. Composite blocks submitted to similar surface treatments were bonded together with the resin adhesive Single Bond and Rely X luting composite. A 500-g load was applied for 5 minutes and the samples were light-cured for 40s. The bonded blocks were serially sectioned into 3 slabs with 0.9mm of thickness perpendicularly to the bonded interface (n = 12). Slabs were trimmed to a dumbbell shape and tested in tension at 0.5mm/min. For all composites tested, the application of a silane primer after sandblasting provided the highest bond strength means.
本研究旨在评估不同表面处理对复合树脂与水门汀的微拉伸粘结强度的影响。对两种间接修复用实验室复合树脂（Solidex 和 Targis）和一种常规复合树脂（Filtek Z250）进行了测试。制作了 48 个复合树脂块（5.0x5.0x5.0mm），根据表面处理随机分为六组：1-对照组，600 目 SiC 砂纸（C）；2-硅烷预处理（SI）；3-用 50mmAl2O3喷砂 10s（SA）；4-用 10%氢氟酸蚀刻 60s（HF）；5-HF+SI；6-SA+SI。对接受类似表面处理的复合块用树脂胶粘剂 Single Bond 和 Rely X 水门汀进行粘结。施加 500g 负载 5 分钟，并用 40s 光固化。将粘结的块体垂直于粘结界面以 0.9mm 的厚度切成 3 个薄片（n=12）。将薄片修剪成哑铃状，以 0.5mm/min 的速度进行拉伸测试。对于所有测试的复合材料，喷砂后应用硅烷底漆可提供最高的粘结强度均值。
