Dentist, Dental Section, Nongsung Hospital.
Master of Science Program in Dentistry, Faculty of Dentistry, Chiang Mai University.
Dent Mater J. 2021 Mar 31;40(2):385-392. doi: 10.4012/dmj.2020-025. Epub 2020 Nov 19.
This study aimed to evaluate the effect of silane coupling agent contamination on the microtensile bond strength (µTBS) of 3-step etch-and-rinse adhesives on dentin. Flat occlusal dentin surfaces were prepared and randomly divided into 8 groups (n=20) based on the tested adhesives; Scotchbond Multi-purpose or Optibond FL, with contamination of an experimental silane (2 vol% of 3-m ethacryloxypropyltrimethoxysilane at pH 4.5) before acid-etching, after-etching or after-priming; while the groups without silane contamination served as controls. µTBS data were analyzed by two-way ANOVA and Tukey's HSD tests at a significance level of 0.05. Additional specimens of contaminated dentin were used to analyze changes in the organic molecules by Fourier transform infrared spectroscopy (FTIR). Silane contamination before acid-etching did not significantly change µTBS (p>0.05), but contamination after-etching and after-priming significantly decreased µTBS of both adhesives (p<0.05). Silane contamination had an adverse effect on the dentin bond strength of 3-step etch-and-rinse adhesives especially after-priming.
本研究旨在评估硅烷偶联剂污染对 3 步酸蚀-冲洗型粘结剂在牙本质上微拉伸粘结强度（µTBS）的影响。制备平面咬合面牙本质表面，并根据测试的粘结剂将其随机分为 8 组（n=20）；Scotchbond Multi-purpose 或 Optibond FL，在酸蚀前、酸蚀后或酸蚀后用实验性硅烷（pH4.5 时为 3-甲氧基丙基三甲氧基硅烷的 2 体积%）污染；而没有硅烷污染的组作为对照。在 0.05 的显著水平下，使用双向方差分析和 Tukey 的 HSD 检验分析 µTBS 数据。用傅里叶变换红外光谱（FTIR）分析受污染牙本质中有机分子的变化。酸蚀前的硅烷污染不会显著改变 µTBS（p>0.05），但酸蚀后和酸蚀后预处理会显著降低两种粘结剂的 µTBS（p<0.05）。硅烷污染对 3 步酸蚀-冲洗型粘结剂的牙本质粘结强度有不利影响，特别是在预处理后。
