Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.
Clin Oral Implants Res. 2013 Mar;24(3):290-6. doi: 10.1111/j.1600-0501.2012.02525.x. Epub 2012 Jul 12.
Bonding of restorative materials in dentistry may be enhanced significantly by the use of engineered silane blends. Trialkoxy silane esters have the unique property to unite dissimilar materials. Silanization is required when cementing the crown or the abutment on a silica-coated zirconia subgingival implant surface with an organophosphate-resin-composite. In this laboratory study, we report about our latest findings in laboratory experiments on experimental silane primers.
In the adhesion promotion of resin-composites to the zirconia implant surface using four experimental blends, a so-called "Novel Silane System", consisting of a functional silane (3-acryloxypropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane and 3-styrylethyltrimethoxysilane) and a cross-linking silane, bis-1,2-(triethoxysilyl)ethane, were mixed in a water/ethanol solvent system with a pH of 4.5, and applied onto silica-coated planar zirconia specimens. A resin composite stub (with a bonding area diameter of 2.0 mm) was cemented using a polypropylene mold. Initial shear bond strengths (baseline values) were measured of specimens after dry storage and after thermo-cycling between 5.0 ± 0.5°C and 55.0 ± 0.5°C. As the control was a dental prehydrolyzed ready-to-use silane product.
All the values for shear bond strength test were significantly increased (P > 0.05) during thermo-cycling. The results showed that the highest shear bond strength was obtained for 3-glycidoxypropyltrimethoxysilane +bis-1,2-(triethoxysilyl)ethane in both dry and thermo-cycled conditions with stress values of 11.04 and 14.89 MPa, respectively. The lowest values were found for the control silane in both dry and thermo-cycled conditions with stress values of 4.5 and 6.5 MPa, respectively.
Silanization with a novel silane system yielded significantly higher shear bond strength than the control silane (a 3-methacryloxypropyltrimethoxysilane containing). We have introduced a bonding system that might be useful and durable in implant dentistry.
通过使用工程硅烷混合物，牙科修复材料的粘结性可以显著增强。三烷氧基硅烷酯具有将不同材料结合在一起的独特性质。在使用有机磷树脂复合材料将冠或基台粘接到涂有二氧化硅的氧化锆龈下种植体表面时，需要进行硅烷化处理。在这项实验室研究中，我们报告了在实验性硅烷底漆的实验室实验中最新的发现。
在使用四种实验性混合物（一种所谓的“新型硅烷系统”，由功能硅烷（3-丙烯酰氧基丙基三甲氧基硅烷、3-异氰酸丙基三乙氧基硅烷、3-缩水甘油氧基丙基三甲氧基硅烷和 3-苯乙烯基乙基三甲氧基硅烷）和交联硅烷双-1,2-（三乙氧基硅基）乙烷组成）促进树脂复合材料与氧化锆种植体表面的粘结力时，将其在 pH 值为 4.5 的水/乙醇溶剂系统中混合，并涂覆在涂有二氧化硅的平面氧化锆标本上。使用聚丙烯模具将树脂复合块（粘结面积直径为 2.0mm）粘接到标本上。在干燥储存后和在 5.0±0.5°C 和 55.0±0.5°C 之间的热循环后，测量试件的初始剪切粘结强度（基线值）。作为对照，是一种牙科预水解即用型硅烷产品。
在热循环过程中，所有剪切粘结强度测试值均显著增加（P>0.05）。结果表明，在干燥和热循环条件下，3-缩水甘油氧基丙基三甲氧基硅烷+双-1,2-（三乙氧基硅基）乙烷的剪切粘结强度最高，分别为 11.04 和 14.89MPa。在干燥和热循环条件下，对照硅烷的最低值分别为 4.5 和 6.5MPa。
用新型硅烷系统进行硅烷化处理比对照硅烷（含 3-甲基丙烯酰氧基丙基三甲氧基硅烷）的剪切粘结强度显著更高。我们已经引入了一种粘结系统，它可能在植入物牙科中有用且耐用。
