老化前后树脂水门汀与二氧化硅涂层和硅烷化In-Ceram氧化锆的微拉伸粘结强度。
Microtensile bond strength of a resin cement to silica-coated and silanized In-Ceram Zirconia before and after aging.
作者信息
Valandro Luiz Felipe, Ozcan Mutlu, Amaral Regina, Leite Fabiola Pessoa Pereira, Bottino Marco Antonio
机构信息
Department of Dental Materials and Prosthodontics, São Paulo State University, São Jose dos Campos, Brazil.
出版信息
Int J Prosthodont. 2007 Jan-Feb;20(1):70-2.
PURPOSE
This study compared the microtensile bond strength of resin-based cement (Panavia F) to silica-coated, silanized, glass-infiltrated high-alumina zirconia (In-Ceram Zirconia) ceramic in dry conditions and after various aging regimens.
MATERIALS AND METHODS
The specimens were placed in 1 of 4 groups: group 1: dry conditions (immediate testing without aging); group 2: water storage at 37 degrees C for 150 days; group 3: 150 days of water storage followed by thermocycling (x 12,000, 5 degrees C to 55 degres C); group 4: water storage for 300 days; group 5: water storage for 300 days followed by thermocycling.
RESULTS
Group 1 showed a significantly higher microtensile bond strength value (26.2 + 1 MPa) than the other aging regimens (6.5 +/-1, 6.2 +/-2, 4.5+/-1, 4.3+/-1 MPa for groups 2, 3, 4, and 5, respectively) (P < .01).
CONCLUSION
Satisfactory results were seen in dry conditions, but water storage and thermocycling resulted in significantly weaker bonds between the resin cement and the zirconia.
目的
本研究比较了树脂基水门汀（Panavia F）与二氧化硅涂层、硅烷化、玻璃渗透的高铝氧化锆（In-Ceram Zirconia）陶瓷在干燥条件下以及经过各种老化方案后的微拉伸粘结强度。
材料与方法
将标本分为4组中的1组：第1组：干燥条件（不老化直接测试）；第2组：在37摄氏度下储存150天；第3组：储存150天后进行热循环（12000次，5摄氏度至55摄氏度）；第4组：储存300天；第5组：储存300天后进行热循环。
结果
第1组的微拉伸粘结强度值（26.2 + 1兆帕）明显高于其他老化方案（第2、3、4和5组分别为6.5 +/-1、6.2 +/-2、4.5 +/-1、4.3 +/-1兆帕）（P <.01）。
结论
在干燥条件下可获得满意结果，但储存水和热循环会导致树脂水门汀与氧化锆之间的粘结明显变弱。
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