Department of Restorative Dentistry, Faculty of Dentistry, University of Kocaeli, Kocaeli, Turkey.
Department of Restorative Dentistry, Faculty of Dentistry, University of Istanbul, Istanbul, Turkey.
J Prosthodont. 2019 Feb;28(2):e485-e490. doi: 10.1111/jopr.12737. Epub 2018 Feb 11.
To investigate the effect of sandblasting powder particles on microtensile bond strength (μTBS) of dual-cure adhesive cement to CAD/CAM blocks.
CAD/CAM blocks (Cerasmart, VITA, and LAVA) were cut in slabs and divided into groups: group 1, no sandblasting; group 2, sandblasted with 27-μm Al O ; group 3, sandblasted with 30-μm CoJet; group 4, sandblasted with 50-μm Al O . After sandblasting, all specimens were silanized and luted using dual-cure adhesive cement (G-CEM LinkForce). After 24 hours, bonded specimens were cut into 1 ± 0.2 mm sticks, and μTBS values were obtained (N = 30). Additionally, 132 CAD/CAM block sections were prepared for surface roughness testing and scanning electron microscopy (SEM) evaluations. Results were analyzed using Kruskal-Wallis One-way ANOVA and Dunn's Post Hoc Test (p < 0.05).
Group 1 exhibited significantly lower μTBS than the other groups (p < 0.05). The highest bond strength values were obtained from group 4 (p > 0.05). For LAVA, μTBS values of specimens that were sandblasted with 50-μm Al O powder were significantly higher than 30-μm-SiO and 27-μm Al O (p < 0.05).
The sand particles investigated (27-μm Al O , 30-μm SiO , or 50-μm Al O ) did not significantly affect μTBS results of CAD/CAM blocks for Cerasmart and VITA, although the results changed significantly for LAVA. The ideal bond protocol for CAD/CAM blocks is specific to the material used.
研究喷砂粉颗粒对 CAD/CAM 块用双固化粘结剂的微拉伸粘结强度（μTBS）的影响。
将 CAD/CAM 块（Cerasmart、VITA 和 LAVA）切割成平板，并分为以下几组：组 1，未喷砂；组 2，用 27-μm Al2O3 喷砂；组 3，用 30-μm CoJet 喷砂；组 4，用 50-μm Al2O3 喷砂。喷砂后，所有标本均用硅烷偶联剂处理并用双固化粘结剂（G-CEM LinkForce）粘结。24 小时后，将粘结好的标本切割成 1±0.2mm 的棒状，测量 μTBS 值（N=30）。此外，还制备了 132 个 CAD/CAM 块试件用于表面粗糙度测试和扫描电子显微镜（SEM）评估。结果采用 Kruskal-Wallis 单向方差分析和 Dunn 事后检验（p＜0.05）进行分析。
组 1 的 μTBS 值明显低于其他组（p＜0.05）。组 4 的粘结强度值最高（p＞0.05）。对于 LAVA，用 50-μm Al2O3 粉末喷砂的试件的 μTBS 值明显高于 30-μm-SiO2 和 27-μm Al2O3（p＜0.05）。
研究的喷砂颗粒（27-μm Al2O3、30-μm-SiO2 或 50-μm Al2O3）对 Cerasmart 和 VITA 的 CAD/CAM 块的 μTBS 结果没有显著影响，尽管 LAVA 的结果变化显著。CAD/CAM 块的理想粘结方案取决于所使用的材料。
