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首页> 外文期刊>Brazilian Dental Journal >Acid Etching and Surface Coating of Glass-Fiber Posts: Bond Strength and Interface Analysis
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Acid Etching and Surface Coating of Glass-Fiber Posts: Bond Strength and Interface Analysis

机译：玻璃纤维桩的酸蚀和表面涂层：粘结强度和界面分析

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The aim of this study was to evaluate the bond strength of a composite resin to glass-fiber post (GFP) treated or not with phosphoric acid, silane coupling agent, and unfilled resin. GFPs were etched or not with 37% phosphoric acid and different surface coating applied: silane coupling agent, unfilled resin, or both. Composite resin blocks were built around a 4-mm height on the GFP. Unfilled resin (20 s) and composite resin (40 s) were light activated by a light-emitting diode unit. The specimens were stored in distilled water at 37 ?°C for 24 h. Microtensile bond test was performed using a mechanical testing machine until failure (n=10). The data were analyzed using two-way ANOVA followed by Student-Newman-Keuls' test (p<0.05). Failure modes were classified as adhesive, mixed, or cohesive failures. Additional specimens (n=3) were made to analyze the bonded interfaces by scanning electron microscopy. The statistical analysis showed the factor 'surface coating' was significant (p<0.05), whereas the factor 'HP etching' (p=0.131) and interaction between the factors (p=0.171) were not significant. The highest bond strength was found for the silane and unfilled resin group (p<0.05). A predominance of adhesive and cohesive failures was found. Differences regarding the homogeneity and thickness of the unfilled resin layer formed by different GFP surface treatments were observed. The application of silane and unfilled resin can improve the bond strength between GFP and resin composite.
机译：这项研究的目的是评估复合树脂与用磷酸，硅烷偶联剂和未填充树脂处理或未处理的玻璃纤维桩（GFP）的粘结强度。 GFP是否用37％的磷酸蚀刻或不蚀刻，并施加了不同的表面涂层：硅烷偶联剂，未填充的树脂或两者。复合树脂块在GFP上高约4毫米。未填充的树脂（20s）和复合树脂（40s）通过发光二极管单元被光激活。将样品在37°C的蒸馏水中保存24小时。使用机械测试仪进行微拉伸粘合测试，直到失效（n = 10）。数据采用双向方差分析和Student-Newman-Keuls检验进行分析（p <0.05）。失效模式分为粘合失效，混合失效或内聚失效。制备另外的样品（n ＝ 3）以通过扫描电子显微镜分析结合的界面。统计分析表明，因素“表面涂层”显着（p <0.05），而因素“ HP蚀刻”（p = 0.131）和因素之间的相互作用（p = 0.171）不显着。对于硅烷和未填充的树脂组，发现了最高的粘合强度（p <0.05）。发现主要的粘合和内聚破坏。观察到关于通过不同的GFP表面处理形成的未填充树脂层的均匀性和厚度的差异。硅烷和未填充树脂的应用可以提高GFP与树脂复合材料之间的结合强度。

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