Valandro Luiz Felipe, Ozcan Mutlu, Amaral Regina, Leite Fabiola Pessoa Pereira, Bottino Marco Antonio
Department of Dental Materials and Prosthodontics, São Paulo State University, São Jose dos Campos, Brazil.
Int J Prosthodont. 2007 Jan-Feb;20(1):70-2.
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.
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.
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).
Satisfactory results were seen in dry conditions, but water storage and thermocycling resulted in significantly weaker bonds between the resin cement and the zirconia.
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。
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。
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）。
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。
