Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, PR China.
Dent Mater. 2011 Mar;27(3):273-80. doi: 10.1016/j.dental.2010.11.002. Epub 2010 Nov 30.
To evaluate the effect of five experimental silane monomer primers in vitro on the shear bond strength of a phosphate ester resin-composite cement bonded to a silicatized zirconia framework.
A total of 144 planar zirconia (Procera AllZircon) specimens were subjected to tribochemical silica treatment, randomly divided into 12 sub-groups (n=12), and silanized with 1.0%(v/v) activated solutions of 3-acryloxypropyltrimethoxysilane, 3 glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, styrylethyltrimethoxysilane, and 3-isocyanatopropyltriethoxysilane, which had been prepared in 95% ethanol (pH 4.5). A ready-to-use 3-methacryloxypropyltrimethoxysilane (RelyX™ Ceramic Primer) was used as the control. One resincomposite cement (RelyX™ Unicem) stub was bonded to each silicatized and silanized zirconia specimen. Half of the specimen groups were dry-tested and half were thermo-cycled at 6000 cycles between 5°C and 55°C, with a constant dwelling time of 30s. The shear bond strengths of the cement stubs bonded to zirconia were measured using a universal testing machine using a constant cross-head speed of 1mm/min. The silane primer activation was evaluated using Fourier-transform infrared spectroscopy.
The highest shear bond strength was obtained for 3-acryloxypropyltrimethoxysilane in dry storage, 11.7 MPa (SD, 2.3 MPa) and after thermo-cycling 17.6 (4.1) MPa for glycidoxypropyltrimethoxysilane. The lowest shear bond strength values were obtained with control silane: in dry storage, 4.5 (1.3) MPa, after thermo-cycling 6.5 (2.6) MPa. Thermo-cycling increased the bond strengths significantly (ANOVA, p<0.001) and differently for each type of silane (ANOVA, p<0.001).
Silanization with five experimental silane primers in vitro produced significantly greater shear bond strengths than the ready-to-use control silane.
评估五种实验性硅烷单体偶联剂在体外对磷酸酯树脂复合粘结剂与硅烷化氧化锆基底之间剪切结合强度的影响。
将 144 个平面氧化锆（Procera AllZircon）标本进行物理化学的二氧化硅处理，随机分为 12 个亚组（n=12），并用 1.0%（v/v）的 3-丙烯酰氧基丙基三甲氧基硅烷、3-缩水甘油氧基丙基三甲氧基硅烷、3-甲基丙烯酰氧基丙基三甲氧基硅烷、苯乙烯乙基三甲氧基硅烷和 3-异氰酸丙基三乙氧基硅烷的活化溶液处理，这些溶液均在 95%乙醇（pH4.5）中制备。使用即用型 3-甲基丙烯酰氧基丙基三甲氧基硅烷（RelyX™陶瓷偶联剂）作为对照。每个硅烷化和硅烷偶联处理后的氧化锆标本上粘结一个树脂复合粘结剂（RelyX™Unicem）的试棒。一半的标本进行干燥测试，一半在 5°C 至 55°C 之间进行 6000 次热循环，恒定驻留时间为 30s。使用万能试验机以恒定的十字头速度 1mm/min 测量粘结在氧化锆上的粘结剂试棒的剪切结合强度。使用傅里叶变换红外光谱法评估硅烷偶联剂的活化情况。
在干燥储存时，3-丙烯酰氧基丙基三甲氧基硅烷的剪切结合强度最高，为 11.7MPa（标准差，2.3MPa），热循环后为 17.6（4.1）MPa；使用对照硅烷时的剪切结合强度最低，干燥储存时为 4.5（1.3）MPa，热循环后为 6.5（2.6）MPa。热循环显著提高了粘结强度（方差分析，p<0.001），并且对每种硅烷的影响不同（方差分析，p<0.001）。
体外使用五种实验性硅烷偶联剂进行硅烷化处理，与即用型对照硅烷相比，产生的剪切结合强度显著更高。
