Department of Operative Dentistry, Faculty of Dentistry, Istanbul University, Capa-Istanbul, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Istanbul University, Capa-Istanbul, Turkey.
J Adv Prosthodont. 2014 Dec;6(6):434-43. doi: 10.4047/jap.2014.6.6.434. Epub 2014 Dec 17.
The purpose of this study was to evaluate and compare the effects of different surface pretreatment techniques on the surface roughness and shear bond strength of a new self-adhering flowable composite resin for use with lithium disilicate-reinforced CAD/CAM ceramic material.
A total of one hundred thirty lithium disilicate CAD/CAM ceramic plates with dimensions of 6 mm × 4 mm and 3 mm thick were prepared. Specimens were then assigned into five groups (n=26) as follows: untreated control, coating with 30 µm silica oxide particles (Cojet™ Sand), 9.6% hydrofluoric acid etching, Er:YAG laser irradiation, and grinding with a high-speed fine diamond bur. A self-adhering flowable composite resin (Vertise Flow) was applied onto the pre-treated ceramic plates using the Ultradent shear bond Teflon mold system. Surface roughness was measured by atomic force microscopy. Shear bond strength test were performed using a universal testing machine at a crosshead speed of 1 mm/min. Surface roughness data were analyzed by one-way ANOVA and the Tukey HSD tests. Shear bond strength test values were analyzed by Kruskal-Wallis and Mann-Whitney U tests at α=.05.
Hydrofluoric acid etching and grinding with high-speed fine diamond bur produced significantly higher surface roughness than the other pretreatment groups (P<.05). Hydrofluoric acid etching and silica coating yielded the highest shear bond strength values (P<.001).
Self-adhering flowable composite resin used as repair composite resin exhibited very low bond strength irrespective of the surface pretreatments used.
本研究旨在评估和比较不同表面预处理技术对新型自粘接流动复合树脂与锂硅玻璃陶瓷材料结合性能的表面粗糙度和剪切粘结强度的影响。
共制备了 130 个尺寸为 6mm×4mm、厚 3mm 的锂硅玻璃 CAD/CAM 陶瓷板。将试件分为 5 组（n=26）：未处理对照组、涂布 30μm 二氧化硅颗粒（Cojet™ Sand）、9.6%氢氟酸蚀刻、Er:YAG 激光照射、高速细金刚砂钻头打磨。用 Ultradent 剪切粘结聚四氟乙烯模具系统将自粘接流动复合树脂（Vertise Flow）应用于预处理后的陶瓷板上。采用原子力显微镜测量表面粗糙度。用万能试验机以 1mm/min 的十字头速度进行剪切粘结强度测试。用单向方差分析和 Tukey HSD 检验分析表面粗糙度数据。用 Kruskal-Wallis 和 Mann-Whitney U 检验分析剪切粘结强度测试值（α=0.05）。
与其他预处理组相比，氢氟酸蚀刻和高速细金刚砂钻头打磨的表面粗糙度显著更高（P<.05）。氢氟酸蚀刻和二氧化硅涂层的剪切粘结强度值最高（P<.001）。
自粘接流动复合树脂作为修复复合树脂，无论使用何种表面预处理，其粘结强度均非常低。
