Acidic pH weakens the bonding effectiveness of silane contained in universal adhesives
Acidic pH weakens the bonding effectiveness of silane contained in universal adhesives
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酸性 pH 值会削弱通用粘合剂中硅烷的粘合效果
DOI：
10.1016/j.dental.2018.02.004
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发表时间：
2018-05-01
期刊：
影响因子：
5
通讯作者：
Huang, Cui
中科院分区：
文献类型：
--
作者：
Yao, Chenmin;Yu, Jian;Huang, Cui
目标.介绍了几种含硅烷的通用胶粘剂，由于硅烷的引入，使玻璃陶瓷粘接不需要单独的陶瓷底漆。我们的目的是研究硅烷在酸性介质中的通用粘合剂中的有效性。使用官能化的γ-甲基丙烯酰氧基丙基三甲氧基硅烷（γ-MPTS），并且通过添加盐酸（HCl）或10-甲基丙烯酰氧基癸基磷酸酯（MDP）将其pH值调节至2.7。采用傅里叶变换红外光谱（FTIR）、H-1和C-13核磁共振（NMR）等方法对贮存2 h和10 d后的酸性硅烷溶液进行了表征。采用微剪切结合强度（μ SBS）评价了微晶玻璃的结合性能。包括两种含硅烷和两种不含硅烷的通用粘合剂。场发射扫描电子显微镜断口分析也进行了。FTIR、H-1和C-13 NMR表明，在酸性条件下（HCl或MDP溶液），γ-MPTS的水解和硅烷醇基团的自缩合反应随时间发生。该反应形成硅氧烷低聚物。对于玻璃陶瓷粘结，酸性硅烷在10 d后的ii，SBS低于放置2 h的硅烷（p < 0.05），而四种通用粘结剂的ii，SBS之间差异不显著（p > 0.05）。此外，内聚破坏是万能胶粘接的主要断裂形式。低pH值通用胶粘剂中所含硅烷的有效性会因脱水自缩合而减弱，从而变得不稳定。为了提高玻璃陶瓷与通用胶粘剂的粘接效率，建议使用单独的陶瓷底漆。(C)2018年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objectives. Some silane-containing universal adhesives were introduced that a separate ceramic primer was unnecessary to glass-ceramic bonding because of incorporated silane. We aimed to investigate the effectiveness of silane in universal adhesives with acidic media.Methods. A functional gamma-methacryloxypropyltrimethoxysilane (gamma-MPTS) was used, and its pH value was adjusted to 2.7 by adding hydrochloric acid (HCl) or 10-methacryloxydecyl phosphate (MDP). The prepared acidic silane solutions after 2 h or 10 d storage were characterized by Fourier transform infrared spectroscopy (FTIR), H-1 and C-13 nuclear magnetic resonance (NMR) spectroscopy. Micro-shear bond strength (mu SBS) was used to evaluate the bonding performance of glass ceramics. Two silane-containing and two silane-free universal adhesives were included. Field-emission scanning electron microscopy fractography analysis was also performed.Results. FTIR, H-1 and C-13 NMR revealed that the hydrolysis of gamma-MPTS and the selfcondensation reaction of silanol groups occurred over time under acidic conditions (HCl or MDP solution). This reaction formed the siloxane oligomers. For glass-ceramic bonding, the ii,SBS of acidic silane after 10 d storage was lower than that of silane stored for 2 h storage (p < 0.05), although the difference among the ii,SBS of the four universal adhesives were nonsignificant (p > 0.05). Additionally, cohesive failure was the main fracture pattern of universal adhesive bonding.Significance. The effectiveness of silane contained in low pH universal adhesives can be weakened by dehydration self-condensation and consequently became unstable. For the enhancement of glass-ceramic bonding efficiency with universal adhesives, a separate ceramic primer was recommended. (C) 2018 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.