São Jose dos Campos Dental School, São Paulo State University (UNESP), São Paulo, Brazil.
J Prosthodont. 2010 Feb;19(2):103-11. doi: 10.1111/j.1532-849X.2009.00546.x. Epub 2009 Dec 21.
To evaluate the influence of surface treatment on the shear bond strength between a Co-Cr alloy and two ceramics.
Forty-eight metal cylinders were made (thickness: 4 mm, height: 3.7 mm) according ISO TR 11405. The 48 metallic cylinders were divided into four groups (n = 12), according to the veneering ceramic (StarLight Ceram and Duceram Kiss) and surface treatments: air-particle abrasion with Al(2)O(3) or tungsten drill (W). Gr1: StarLight + Al(2)O(3); Gr2: StarLight + W; Gr3: Duceram + Al(2)O(3); and Gr4: Duceram + W. The specimens were aged using thermal cycling (3000x, 5 to 55 degrees C, dwell time: 30 seconds, transfer time: 2 seconds). The shear test was performed with a universal testing machine, using a load cell of 100 kg (speed: 0.5 mm/min) and a specific device. The bond strength data were analyzed using ANOVA and Tukey's test (5%), and the failure modes were analyzed using an optical microscope (30x).
The means and standard deviations of the shear bond strengths were (MPa): G1 (57.97 +/- 11.34); G2 (40.62 +/- 12.96); G3 (47.09 +/- 13.19); and G4 (36.80 +/- 8.86). Ceramic (p= 0.03252) and surface treatment (p= 0.0002) significantly affected the mean bond strength values.
Air-particle abrasion with Al(2)O(3) improved the shear bond strength between metal and ceramics used.
评估表面处理对 Co-Cr 合金与两种陶瓷之间的剪切结合强度的影响。
根据 ISO TR 11405 标准制作了 48 个金属圆柱体（厚度：4mm，高度：3.7mm）。将这 48 个金属圆柱体根据覆盖陶瓷（StarLight Ceram 和 Duceram Kiss）和表面处理分为四组（n=12）：Al2O3 喷砂或钨钻处理（Gr1：StarLight+Al2O3；Gr2：StarLight+W；Gr3：Duceram+Al2O3；Gr4：Duceram+W）。使用热循环（3000x，5 至 55 摄氏度，停留时间：30 秒，转移时间：2 秒）对试件进行老化处理。使用万能试验机和 100kg 负载单元（速度：0.5mm/min）以及特定装置进行剪切试验。使用方差分析和 Tukey 检验（5%）分析结合强度数据，并使用光学显微镜（30x）分析失效模式。
剪切结合强度的平均值和标准差分别为（MPa）：Gr1（57.97±11.34）；Gr2（40.62±12.96）；Gr3（47.09±13.19）；Gr4（36.80±8.86）。陶瓷（p=0.03252）和表面处理（p=0.0002）显著影响平均结合强度值。
Al2O3 喷砂处理提高了金属与所使用陶瓷之间的剪切结合强度。
