University of Missouri-Kansas City School of Dentistry, Kansas City, MO 64108, USA.
Dent Mater J. 2013;32(3):484-91. doi: 10.4012/dmj.2012-303.
The study investigated the influence of reactive (enamel) and un-reactive (glass) substrates on photo-polymerization of self-etching adhesives. Two commercial adhesives Adper Prompt L-Pop (APLP, pH0.8) and Adper Easy Bond (AEB, pH2.5) were applied onto prepared enamel and glass substrates using the same protocol. Micro-Raman spectroscopy was employed to determine the degree of conversion (DC) and the involved mechanism. DC of APLP was dramatically enhanced from ~9.4% to ~82.0% as when changing from glass to enamel, while DC of AEB on both substrates showed no difference. The DC distributions along the adhesive layers of the APLP and AEB on enamel showed descending and constant trends, respectively. Spectral analysis disclosed that the difference in chemical reaction of the two adhesives with enamel might be associated with the results. The chemical reaction of the adhesives with enamel significantly improved the DC of the strong APLP, but not that of the mild AEB.
本研究调查了反应性（牙釉质）和非反应性（玻璃）基底对自酸蚀黏结剂光聚合的影响。两种商业黏结剂 Adper Prompt L-Pop (APLP，pH 值约为 0.8) 和 Adper Easy Bond (AEB，pH 值约为 2.5) 按照相同的方案应用于预处理的牙釉质和玻璃基底上。采用微拉曼光谱法来确定转化率 (DC) 和相关机制。当从玻璃基底变为牙釉质基底时，APLP 的 DC 从约 9.4%显著提高到约 82.0%，而 AEB 在两种基底上的 DC 没有差异。APLP 和 AEB 在牙釉质上的黏结剂层中的 DC 分布分别呈现下降和恒定的趋势。光谱分析表明，两种黏结剂与牙釉质的化学反应差异可能与结果有关。黏结剂与牙釉质的化学反应显著提高了强 APLP 的 DC，但对弱 AEB 的 DC 没有影响。
