Matinlinna Jukka P, Lassila Lippo V J, Vallittu Pekka K
Nordic Institute of Dental Materials (NIOM), Haslum, Norway.
Acta Odontol Scand. 2007 Feb;65(1):44-51. doi: 10.1080/00016350600973060.
In this study, we evaluated the effect of two silane coupling agents and their blends with a cross-linker silane on the bond strength of a dimethacrylate-based resin composite cement to surface-conditioned zirconia.
A total of 40 planar zirconia specimens were used for 8 test groups. After alumina particle abrasion, followed by tribochemical silica-coating, the specimens were randomly assigned to four silanizations: with 1.0 vol% 3-methacryloyloxypropyltrimethoxysilane or 1.0 vol% 3-mercaptopropyltrimethoxysilane or their blends with 1.0 vol% 1,2-bis-(triethoxysilyl)ethane (all in ethanol/water). The resin composite (RelyX ARC, 3M ESPE) stubs (n=10/group) were light-polymerized onto zirconia specimens. Four test groups were tested without water storage and 4 thermo-cycled at 6000 cycles (5+/-1 degrees C to 55+/-1 degrees C), with a dwelling time of 30 s. The shear bond strength of the cement stubs to zirconia was measured using a universal testing machine at a constant cross-head speed of 1 mm/min. Scanning electron microscopy was employed for imaging the zirconia surface after conditioning and testing. Failure mode was evaluated visually. A surface chemical analysis was carried out with the EDXA system.
The highest shear bond strength was 21.9+/-8.7 MPa, obtained with a blend of 3-mercaptopropyltrimethoxysilane and 1,2-bis-(triethoxysilyl)ethane (dry storage), and 16.0+/-1.5 MPa, with 3-methacryloyloxypropyltrimethoxysilane (thermo-cycled). Thermo-cycling decreased the bond strengths significantly (ANOVA, p<0.01), and the silanes differed significantly (p<0.005). Some specimens suffered from spontaneous debonding during thermo-cycling.
The luting cement adhesion might be promoted to silica-coated zirconia with 1.0 vol% 3-methacryloyloxypropyltrimethoxysilane and with a blend of 1.0 vol% 3-mercaptopropyltrimethoxysilane and 1.0 vol% 1,2-bis-(triethoxysilyl)ethane.
在本研究中，我们评估了两种硅烷偶联剂及其与交联剂硅烷的混合物对基于二甲基丙烯酸酯的树脂复合水门汀与表面处理后的氧化锆之间粘结强度的影响。
总共40个平面氧化锆标本用于8个测试组。在进行氧化铝颗粒磨损，随后进行摩擦化学硅涂层处理后，将标本随机分为四种硅烷化处理：使用1.0体积%的3-甲基丙烯酰氧基丙基三甲氧基硅烷或1.0体积%的3-巯基丙基三甲氧基硅烷，或它们与1.0体积%的1,2-双（三乙氧基硅基）乙烷的混合物（均在乙醇/水中）。将树脂复合材料（RelyX ARC，3M ESPE）桩核（每组n = 10）光聚合到氧化锆标本上。四个测试组不进行水储存测试，另外四个在6000次循环（5±1℃至55±1℃）下进行热循环，保压时间为30秒。使用万能试验机以1毫米/分钟的恒定十字头速度测量水门汀桩核与氧化锆之间的剪切粘结强度。使用扫描电子显微镜对处理和测试后的氧化锆表面进行成像。通过肉眼评估失效模式。使用EDXA系统进行表面化学分析。
最高剪切粘结强度为21.9±8.7兆帕，是在3-巯基丙基三甲氧基硅烷与1,2-双（三乙氧基硅基）乙烷的混合物处理后（干燥储存）获得的；使用3-甲基丙烯酰氧基丙基三甲氧基硅烷处理后（热循环），剪切粘结强度为16.0±1.5兆帕。热循环显著降低了粘结强度（方差分析，p<0.01），并且硅烷之间存在显著差异（p<0.005）。一些标本在热循环过程中出现自发脱粘。
使用1.0体积%的3-甲基丙烯酰氧基丙基三甲氧基硅烷以及1.0体积%的3-巯基丙基三甲氧基硅烷与1.0体积%的1,2-双（三乙氧基硅基）乙烷的混合物，可能会促进粘结水门汀与硅涂层氧化锆之间的粘结。
