Della Bona Alvaro, Anusavice Kenneth J, Hood James A A
School of Dentistry, University of Passo Fundo, PO Box 611/613, Passo Fundo, RS 99001-970, Brazil.
Int J Prosthodont. 2002 May-Jun;15(3):248-53.
The objective of this study was to test the following hypotheses: (1) hydrofluoric acid (HF)-treated ceramic surfaces produce the highest tensile bond strength to resin cements, independent of the ceramic microstructure and composition; and (2) the tensile bond strength test is appropriate for analysis of interfacial adhesion for ceramic-bonded-to-resin systems.
Ceramic specimens were polished with 1-micron alumina abrasive and divided into four groups of 10 specimens for each of seven ceramic types. One of the following surface treatments was applied: (1) 10% ammonium bifluoride (ABF) for 1 minute; (2) 9.6% HF for 2 minutes; (3) 4% acidulated phosphate fluoride (APF) for 2 minutes; and (4) a silane coupling agent. The surface-treated areas were coated with an adhesive resin and bonded to a resin cement. Specimens were loaded to failure in tension using a testing machine. Tensile bond strength data were statistically analyzed, and fracture surfaces were examined to determine the mode of failure.
Silane-treated surfaces showed statistically higher mean tensile bond strength values than surfaces treated with any etchant (HF, ABF, APF). HF produced statistically higher mean tensile bond strengths than ABF and APF. All failures occurred in the adhesion zone.
The tensile bond strength test is adequate for analysis of the adhesive zone of resin-ceramic systems. The chemical adhesion produced by silane promoted higher mean bond strength values than the micromechanical retention produced by any etchant for the resin-ceramic systems used in this study.
本研究的目的是检验以下假设：（1）氢氟酸（HF）处理过的陶瓷表面对树脂水门汀产生最高的拉伸粘结强度，与陶瓷的微观结构和成分无关；（2）拉伸粘结强度测试适用于分析陶瓷与树脂系统的界面粘结。
用1微米的氧化铝磨料对陶瓷标本进行抛光，并将七种陶瓷类型中的每一种分为四组，每组10个标本。采用以下表面处理之一：（1）10%的氟化氢铵（ABF）处理1分钟；（2）9.6%的HF处理2分钟；（3）4%的酸化磷酸氟（APF）处理2分钟；（4）硅烷偶联剂。对表面处理过的区域涂上粘结树脂，并粘结到树脂水门汀上。使用试验机对标本施加拉伸载荷直至破坏。对拉伸粘结强度数据进行统计分析，并检查断裂表面以确定破坏模式。
硅烷处理过的表面显示出比任何蚀刻剂（HF、ABF、APF）处理过的表面在统计学上更高的平均拉伸粘结强度值。HF产生的平均拉伸粘结强度在统计学上高于ABF和APF。所有破坏均发生在粘结区域。
拉伸粘结强度测试足以分析树脂-陶瓷系统的粘结区域。对于本研究中使用的树脂-陶瓷系统，硅烷产生的化学粘结比任何蚀刻剂产生的微机械固位促进了更高的平均粘结强度值。
