Effect of etchant, etching period, and silane priming on bond strength to porcelain of composite resin.
Effect of etchant, etching period, and silane priming on bond strength to porcelain of composite resin.
复制标题
蚀刻剂、蚀刻时间和硅烷底漆对复合树脂瓷结合强度的影响。
作者：
J.H. Chen;H. Matsumura;M. Atsuta
本研究的目的是评价蚀刻和硅烷底漆对复合树脂（Clearfil APX）与瓷（VMK 68）粘结强度的影响。分别用2.5%和5%的氢氟酸溶液和0、30、60、90、120、150和180秒的氢氟酸溶液对瓷试件进行腐蚀。在蚀刻和未蚀刻的瓷表面上使用含有硅烷偶联剂（Clearfil Porcelain Bond）的自固化粘结剂。通过扫描电镜观察了蚀刻浮雕图案，并测定了光固化复合树脂与瓷之间的结合强度。扫描电子显微照片显示复杂的蚀刻图案，增加蚀刻时间。剪切试验结果表明，复合树脂与未酸蚀瓷的粘结强度很低，酸蚀时间大于30 s可有效提高粘结强度。两种蚀刻剂应用到未硅烷化的瓷，缓冲的2.5%蚀刻剂产生的粘结强度高于5%蚀刻剂的所有蚀刻时间段，除了180秒。硅烷预处理是提高瓷结合强度的有效和关键。在氢氟酸蚀刻后将硅烷键合剂应用于瓷似乎适合于实现复合树脂与瓷之间的一致键合。
The purpose of this study was to evaluate the effect of etching and silane priming on bond strength to a feldspathic porcelain (VMK 68) of a composite resin (Clearfil APX). Two hydrofluoric acid etchants (2.5% and 5%) and seven different etching times (0, 30, 60, 90, 120, 150, and 180 seconds) were used to etch the porcelain specimens respectively. A self-curing bonding agent containing a silane coupler (Clearfil Porcelain Bond) was used on both etched and unetched porcelain surfaces. Etched relief patterns were observed by means of a scanning electron microscope, and the bond strengths between the photocured composite resin and the porcelain were determined. Scanning electron micrographs revealed complicated etching patterns with increased etching time periods. Shear testing results showed that the bond strength to the unetched porcelain of the composite resin was very low, and that etching periods for more than 30 seconds effectively enhanced the bond strength. Of the two etching agents applied to the unsilanated porcelain, the buffered 2.5% etchant produced higher bond strengths than the 5% etchant for all etching time periods except for 180 seconds. Silane priming was effective and critical for improving bond strength to the porcelain. Application of the silane bonding agent to the porcelain after hydrofluoric acid etching appeared to be suitable for achieving consistent bonding between the composite resin and the porcelain.