de Rosatto Camila Maria Peres, Roscoe Marina Guimarães, Novais Veridiana Resende, Menezes Murilo de Sousa, Soares Carlos José
Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil.
Braz Dent J. 2014;25(3):217-24. doi: 10.1590/0103-6440201300005.
This study evaluated the influence of silane type and temperature of silane application on push-out bond strength between fiberglass posts with composite resin core and resin cement. One hundred and sixty fiberglass posts (Exacto, Angelus) had the surface treated with hydrogen peroxide 24%. Posts were divided in 8 groups according to two study factors: air-drying temperature after silane application (room temperature and 60 ºC) and silane type: three pre-hydrolyzed--Silano (Angelus), Prosil (FGM), RelyX Ceramic Primer (3M ESPE) and one two-component silane--Silane Coupling Agent (Dentsply). The posts (n=10) for testing the bond strength between post and composite core were centered on a cylindrical plastic matrix and composite resin (Filtek Z250 XT, 3M ESPE) that was incrementally inserted and photoactivated. Eighty bovine incisor roots (n=10) were prepared for testing the bond strength between post and resin cement (RelyX U100, 3M ESPE) and received the fiberglass posts. Push-out test was used to measure the bond strength. Data were analyzed by two-way ANOVA followed by Tukey's test (α=0.05). ANOVA revealed that temperature and silane had no influence on bond strength between composite core and post. However, for bond strength between post and resin cement, the temperature increase resulted in a better performance for Silane Coupling Agent, Silano and RelyX Ceramic Primer. At room temperature Silane Coupling Agent showed the lowest bond strength. Effect of the warm air-drying is dependent on the silane composition. In conclusion, the use of silane is influenced by wettability of resinous materials and pre-hydrolyzed silanes are more stable compared with the two-bottle silane.
本研究评估了硅烷类型和硅烷应用温度对复合树脂核玻璃纤维桩与树脂水门汀之间推出粘结强度的影响。160根玻璃纤维桩（Exacto，安杰卢斯公司）用24%的过氧化氢进行表面处理。根据两个研究因素将桩分为8组：硅烷应用后的风干温度（室温与60℃）和硅烷类型：三种预水解硅烷——Silano（安杰卢斯公司）、Prosil（FGM公司）、RelyX Ceramic Primer（3M ESPE公司）以及一种双组分硅烷——硅烷偶联剂（登士柏公司）。用于测试桩与复合树脂核之间粘结强度的桩（n = 10）置于圆柱形塑料基质中心，复合树脂（Filtek Z250 XT，3M ESPE公司）逐层填入并光固化。准备80颗牛切牙根（n = 10）用于测试桩与树脂水门汀（RelyX U100，3M ESPE公司）之间的粘结强度，并植入玻璃纤维桩。采用推出试验测量粘结强度。数据通过双向方差分析，随后进行Tukey检验（α = 0.05）。方差分析显示，温度和硅烷对复合树脂核与桩之间的粘结强度没有影响。然而，对于桩与树脂水门汀之间的粘结强度，温度升高使硅烷偶联剂、Silano和RelyX Ceramic Primer的性能更好。在室温下，硅烷偶联剂的粘结强度最低。热风干燥的效果取决于硅烷成分。总之，硅烷的使用受树脂材料润湿性的影响，与双瓶装硅烷相比，预水解硅烷更稳定。
