Degree of conversion of resin blends in relation to ethanol content and hydrophilicity
Degree of conversion of resin blends in relation to ethanol content and hydrophilicity
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DOI：
10.1016/j.dental.2008.01.012
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发表时间：
2008-09-01
期刊：
影响因子：
5
通讯作者：
Pashley, David H.
中科院分区：
文献类型：
--
作者：
Cadenaro, Milena;Breschi, Lorenzo;Pashley, David H.
目标。评价五种实验胶粘剂体系的转化程度与其亲水性的关系。树脂共混物的范围从疏水性到亲水性不等，并被测试为纯粘结剂，或用增加乙醇百分比的溶剂化。验证了树脂共混物的聚合程度受树脂亲水性、溶剂浓度和聚合时间的影响。研究了5种纯光固化型实验树脂共混物：(1)70% E-BisADM, 28.75% TEGDMA；(2) 70% BisGMA, 28.7% TEGDMA；(3) BisGMA 70%, HEMA 28.7%；(4) BisGMA占40%，TCDM占30%，TEGDMA占28.75%；(5) 40% BisGMA, 30% BisMP, 28.75% HEMA。所有共混物均含有1% EDMAB和0.25% CQ的乙醇，分别以不同的重量百分比（A: 0%, B: 30%, C: 50%， D: 70%和E: 90%）加入这些树脂共混物中，模拟不同配方的粘合剂。用差示扫描量热计测定树脂共混物的转化率与树脂亲水性、溶剂浓度和固化时间的关系，并采用三向方差分析和Tukey事后检验对数据进行分析。放热实验表明，共混树脂的亲水性对转化程度有影响
Objectives. To evaluate the degree of conversion of five experimental adhesive systems in relation to their hydrophilicity. The resin blends ranged from hydrophobic to hydrophilic and were tested as neat bonding agents, or solvated with increasing percentages of ethanol. The hypothesis tested was that extent of polymerization of resin blends is affected by resin hydrophilicity, solvent concentrations or time of polymerization.Methods. Five light-curing versions of neat experimental resin blends were submitted to investigation: (1) 70% E-BisADM, 28.75% TEGDMA; (2) 70% BisGMA, 28.7% TEGDMA; (3) 70% BisGMA, 28.7% HEMA; (4) 40% BisGMA, 30%, TCDM, and 28.75% TEGDMA; (5) 40% BisGMA, 30% BisMP, and 28.75% HEMA. All blends included 1% EDMAB and 0.25% CQ Ethanol in different weight percentages (A: 0%, B: 30%, C: 50% D: 70% and E: 90%) was added to these resin blends simulating different formulation of adhesives. A differential scanning calorimeter was used to measure the degree of conversion of resin blends as a function of resin hydrophilicity, solvent concentration and time of curing, Data were analyzed with three-way ANOVA and Tukey's post hoc test.Results. Exotherms showed that degree of conversion was influenced by the hydrophilicity of the blends resin (p