Changes in resin-infiltrated dentin stiffness after water storage
Changes in resin-infiltrated dentin stiffness after water storage
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DOI：
10.1177/154405910808700704
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发表时间：
2008-07-01
影响因子：
7.6
通讯作者：
Tay, F. R.
中科院分区：
文献类型：
--
作者：
Chiaraputt, S.;Mai, S.;Tay, F. R.
聚合物通过吸水进行塑化会降低其机械性能，其方式可由其组成树脂的极性来预测。这项研究验证了一种假设，即当粘接树脂被用来创建树脂渗透的牙本质时，其在水存储后的弯曲模数的降低将与其亲水性成正比。三种亲水性越来越强的树脂混合物被用来制作树脂渗透牙本质的聚合梁和宏观杂化层模型，用于在储水1-4周之前和之后用微型三点弯曲装置进行测试。宏观杂化层中的弯曲模数降低与相应的聚合物梁中的降低有关，并且比相应的聚合物梁中的降低更广泛。更亲水的大分子杂化层表现出更高的弯曲模量下降百分比，降低率与HOY的总分子间引力(Delta(T))和极化力(Delta(P))的溶解度参数成正比。
Plasticization of polymers by water sorption lowers their mechanical properties in a manner that is predictable by the polarity of their component resins. This study tested the hypothesis that when adhesive resins were used to create resin- infiltrated dentin, the reductions in their flexural moduli after water storage would be lowered proportional to their hydrophilic characteristics. Three increasingly hydrophilic resin blends were used to fabricate polymer beams and macro-hybrid layer models of resin-infiltrated dentin for testing with a miniature three-point flexure device, before and after 1-4 weeks of water storage. Flexural modulus reductions in macro-hybrid layers were related to, and more extensive than, reductions in the corresponding polymer beams. Macro-hybrid layers that were more hydrophilic exhibited higher percent reductions in flexural modulus, with the rate of reduction proportional to the Hoy's solubility parameters for total intermolecular attraction forces (delta(t)) and polar forces (delta(p)) of the macro-hybrid layers.