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首页> 外文期刊>Journal of dentistry >Improved degree of conversion of model self-etching adhesives through their interaction with dentine
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Improved degree of conversion of model self-etching adhesives through their interaction with dentine

机译：通过与牙本质的相互作用提高模型自蚀刻粘合剂的转化度

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Objective: To investigate the correlation of the chemical interaction between model self-etching adhesives and dentine with the degree of conversion (DC) of the adhesives. Methods: The model self-etching adhesives contained bis[2-methacryloyloxy)ethyl] phosphate (2MP) and 2-hydroxyethyl methacrylate (HEMA) with a mass ratio of 1/1, and 0-40% water contents, respectively. The adhesives were applied either onto the prepared dentine surface or unreactive substrates (such as glass slides), agitated for 15 s, then light-cured for 40 s. The DCs of the adhesives were determined using micro-Raman spectral and mapping analysis. Results: The DCs of the adhesives cured on the dentine substrate were found to be significantly higher than those on the unreactive glass substrate. Moreover, the DCs of the adhesives displayed a decreasing trend as the distance from the dentine surface became greater. The chemical interaction of the acidic 2MP/HEMA adhesives with the mineral apatite in dentine was proposed to play a significant role for the observations. The chemical interaction could be validated by the spectral comparison in the phosphate regions of 1100 cm -1 and 960 cm -1 in the Raman spectra. The results also revealed a notable influence of water content on the DC of adhesives. The DCs of the adhesive at 10% water content exhibited the highest DC level for both substrates. Conclusions: Interaction with dentine dramatically improved the degree of conversion of self-etching adhesives. Our ability to chemically characterise the a/d interface including in situ detection of the DC distribution is very important in understanding self-etching adhesive bonding under in vivo conditions.
机译：目的：研究模型自蚀刻胶与牙本质之​​间的化学相互作用与胶的转化率（DC）的关系。方法：该模型自蚀刻胶粘剂分别包含质量比为1/1和含水量为0-40％的双[2-甲基丙烯酰氧基）乙基]磷酸酯（2MP）和甲基丙烯酸2-羟乙酯（HEMA）。将胶粘剂涂在准备好的牙本质表面或未反应的基材（例如载玻片）上，搅拌15 s，然后光固化40 s。使用微拉曼光谱和作图分析确定粘合剂的DC。结果：发现在牙本质基材上固化的粘合剂的DC明显高于未反应的玻璃基材上的DC。而且，随着与牙本质表面的距离变大，粘合剂的DCs显示出下降的趋势。有人认为酸性2MP / HEMA粘合剂与牙本质中的矿物磷灰石之间的化学相互作用对观察具有重要作用。化学相互作用可以通过在拉曼光谱中1100 cm -1和960 cm -1的磷酸盐区域的光谱比较来验证。结果还揭示了水含量对粘合剂DC的显着影响。含水量为10％的胶粘剂的DC对两个基材都表现出最高的DC水平。结论：与牙本质的相互作用极大地改善了自蚀刻胶粘剂的转化程度。我们对a / d界面进行化学表征的能力（包括DC分布的原位检测）对于理解体内条件下的自蚀刻胶粘剂非常重要。

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