Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
Dent Mater J. 2012 Feb 3;31(1):139-49. doi: 10.4012/dmj.2011-185. Epub 2012 Jan 21.
The purpose of this study was to investigate the use of different plasticizers in soft acrylic resin materials to reduce leaching of the plasticizer and thus increase the durability of tissue conditioners. Samples were prepared containing different combinations of three types of polymer/copolymer powder and four types of plasticizer liquid (DEHM, DIBA, DAA and DINA). The dynamic viscoelasticity of each sample was measured after water immersion using a dynamic mechanical analyzer. Water absorption, solubility and weight change were also measured. A significant difference was found among the materials regarding dynamic viscoelasticity, water absorption and solubility. The samples containing P-n-BMA had the most stable G' and G'' scores throughout the immersion. P-n-BMA is the most suitable powder together with DEHM as the most suitable liquid component for a tissue conditioner. These results suggest that it is possible to improve the durability of tissue conditioners by combining different polymers and plasticizers.
本研究旨在探讨不同增塑剂在软质丙烯酸树脂材料中的应用，以减少增塑剂的浸出，从而提高牙齿脱敏剂的耐用性。样品中包含三种聚合物/共聚物粉末和四种增塑剂液体（DEHM、DIBA、DAA 和 DINA）的不同组合。使用动态力学分析仪在水浸泡后测量每个样品的动态粘弹性。还测量了吸水率、溶解度和重量变化。关于动态粘弹性、吸水率和溶解度，材料之间存在显著差异。含有 P-n-BMA 的样品在整个浸泡过程中具有最稳定的 G' 和 G''分数。P-n-BMA 是与 DEHM 结合作为牙齿脱敏剂最合适的液体成分的最适合的粉末。这些结果表明，通过组合不同的聚合物和增塑剂，可以提高牙齿脱敏剂的耐用性。
