Dynamic viscoelastic properties of processed soft denture liners: Part I--Initial properties.
Dynamic viscoelastic properties of processed soft denture liners: Part I--Initial properties.
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加工后的软义齿衬垫的动态粘弹性特性：第一部分——初始特性。
DOI：
10.1016/s0022-3913(05)80077-0
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Koran3rd,A
中科院分区：
文献类型：
--
作者：
Wagner,WC;Kawano,F;Dootz,ER;Koran3rd,A
本研究评估了12种实验室加工的软义齿衬垫的动态粘弹性能。按照制造商的说明制备1.4×3×40 mm的试件。每种材料的五个试件在施加1、5或10赫兹的应变频率和23°C和37°C的温度下进行测试。37°C和1赫兹的值被认为是最重要的，因为它们非常接近使用环境；因此，对这些条件进行了材料比较。用定制的动态粘弹仪对样品进行测试。结果采用单因素方差分析和S区间检验。发现储能模数(弹性刚度)有很大差异。其中一种丙烯酸树脂，Verno-soft，表现出明显高于其他材料的存储模数。损失模数反映了材料的粘性行为；在这里也发现了很大的差异。Verno-Soft再次表现出比所有其他材料更高的价值。另外三种丙烯酸树脂(Super Soft、Soft-Pak和Justi Soft)的损耗模数也明显高于其他材料。许多材料的减振系数存在显著差异。大多数丙烯酸和乙烯基树脂比硅橡胶和聚磷腈橡胶具有更高的阻尼系数。对于某些材料，储能模数、损耗模数和阻尼因子的取值受温度和外加应变频率的影响。
This research evaluated the dynamic viscoelastic properties of 12 laboratory-processed soft denture liners. Specimens, 1.4×3×40 mm, were prepared according to the manufacturer's instructions. Five specimens of each material were tested under applied strain frequencies of 1, 5, or 10 Hz and temperatures of 23°C and 37°C. The values at 37°C and 1 Hz were judged most important because they closely approximate the service environment; therefore material comparisons were made for these conditions. Samples were tested with a custom-made dynamic viscoelastometer. The statistical significance of the results was tested by ANOVA and Scheffé's intervals test. Large differences in the storage modulus (elastic stiffness) were found. One acrylic resin, Verno-Soft, showed significantly higher storage moduli than the other materials. The viscous behavior of the materials was reflected by the loss modulus; here large differences were also found. Verno-Soft again exhibited much higher values than all of the other materials. Three other acrylic resins (Super Soft, Soft-Pak, and Justi Soft) also showed significantly higher loss moduli than the other materials. Significant differences were found in the damping factor between many of the materials. Most of the acrylic and vinyl resins had higher damping factors than the silicone and polyphosphazine rubbers. The values of the storage moduli, loss moduli, and the damping factor were affected by temperature and by applied strain frequency with some materials.
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