Solubility, salivary sorption and degree of conversion of dimethacrylate-based polymeric matrixes
Solubility, salivary sorption and degree of conversion of dimethacrylate-based polymeric matrixes
复制标题
DOI：
10.1002/jbm.b.30949
复制
发表时间：
2008-05-01
影响因子：
3.4
通讯作者：
Silva, Eduardo M.
中科院分区：
文献类型：
--
作者：
Goncalves, Luana;Filho, Jaime D. N.;Silva, Eduardo M.
本研究探讨了二甲基丙烯酸酯基聚合物基质的溶解度、唾液吸附和转化度之间的关系。研究了通过混合bis-GMA、TEGDMA和UDMA二甲基丙烯酸酯单体制备的六种聚合物基体。对苯醌/N，N-二甲基-4-氨基苯甲酸乙酯诱导光活化。使用850 mW/cm（2）的辐照度将样品光固化20秒。在人工唾液（中性pH）中浸泡7天后测量溶解度和吸附（μ g/mm（3））。通过使用配备衰减全反射晶体（ATR）的FT-IR光谱仪获得转化率（%）。转化度从39.15 +/-6.30到65.57 +/-4.80变化，并且受聚合物基质中存在的单体的粘度影响。聚合物基质的溶解度在13.64 +/-0.39和25.08 +/-0.83之间变化，并且受到转化程度的强烈影响（Pearson，r =-0.9587，p < 0.01）。唾液吸附和转化程度之间没有相关性（p = 0.3918）。唾液吸附仅取决于聚合物基质中单体的化学和物理结构。(c)2007 Wiley Periodicals，Inc.
This study investigated the relationship between the solubility, salivary sorption, and degree of conversion of dimethacrylate-based polymeric matrixes. Six polymeric matrixes produced by mixing bis-GMA, TEGDMA and UDMA dimethacrylate monomers were studied. Photoactivation was induced by camphoroquinone/ethyl N,N-dimethyl-4-aminobenzoate. The specimens were light-cured using an irradiance of 850 mW/cm(2) for 20 s. The solubility and sorption (mu g/mm(3)) were measured after immersion in artificial saliva (neutral pH) for 7 days. The degree of conversion (%) was obtained by using a FT-IR spectrometer equipped with an attenuated total reflectance crystal (ATR). The degree of conversion varied from 39.15 +/- 6.30 to 65.57 +/- 4.80, and was influenced by the viscosity of the monomers present in the polymeric matrixes. The solubility of polymeric matrixes varied between 13.64 +/- 0.39 and 25.08 +/- 0.83, and was strongly influenced by the degree of conversion (Pearson, r = -0.9587, p < 0.01). No correlation was found between salivary sorption and the degree of conversion (p = 0.3918). Salivary sorption was only dependent on the chemical and physical structures of the monomers presented in the polymeric matrixes. (c) 2007 Wiley Periodicals, Inc.