三种义齿软衬材料吸水性和溶解性的实验研究

Investigation of Water Sorption and Solubility of Three Denture Soft Lining Materials

我们对自凝水凝胶、自凝型丙烯酸酯和 SDG- A硅橡胶三种义齿软衬材料进行吸水性和溶解性的实验探讨。采用的方法是将各材料制成直径 5 0 m m,厚 1m m ,表面平整光滑的园片 ,干燥 2 4h后称重 (m1 ) ,再分别浸在人工唾液和蒸馏水溶液中保持 7d和 2 8d,称湿重 (m2 ) ,继续干燥后称重 (m3) ,最后计算材料的吸水值、吸水率和溶解率 ,统计学分析处理。结果显示 :在人工唾液中 7d和 2 8d的吸水率 ,水凝胶为 2 8.6 2 %和 2 4.96 % ,自凝型丙烯酸酯为 1.89%和 1.6 5 % ,SDG- A硅橡胶为 0 .2 5 %和 0 .2 9% ;溶解率分别为 0 .5 6 %和 0 .5 1% ,0 .74%和0 .83% ,以及 0 .10 %和 0 .12 %。在蒸馏水中 7d和 2 8d的吸水率 ,水凝胶为 30 .15 %和 2 7.85 % ,自凝型丙烯酸酯为3.6 4%和 6 .17% ,SDG- A硅橡胶为 0 .83%和 0 .98% ;溶解率分别为 0 .79%和 1.16 % ,0 .86 %和 1.0 1% ,以及0 .10 %和 0 .14%。结论是三种义齿软衬材料的吸水率大小依次为水凝胶 >丙烯酸酯 >硅橡胶。丙烯酸树脂由于含有一定量的增塑剂 ,其溶解率高于其他两种材料 ;浸泡溶液中增加离子成份可能对材料的吸水性能和溶解性能都有不同程度的影响 ;

This assay was made to investigate the water sorption and solubility of autopolymerizing hydrygel, acrylic resin and silicone denture soft lining materials. The test discs with 50 mm in diameter and 1mm in thickness were prepared according to powder and liquid ratio. The weight of sample was measured after 24 h drying (m1). The sample was put into artificial saliva and distilled water for 7 d and 28 d, the moisture weight was measured after soaking (m2). After drying again, the last data of weight (m3) was acquired till the constant mass was recorded. Finally the values of water sorption and water solubility were calculated respectively with statistical analysis. The results showed the means of percentage about absorption at 7 d and 28 d were 28.62% and 24.96% for hydrygel, 1.89% and 1.65% for acrylic resin, 0.25% and 0.29% for silicone in artificial saliva. The percentage solubility at two stages were 0.56% and 0. 51% for hydrygel, 0.74% and 0.83% for acrylic resin, 0.10% and 0.12% for silicone. In distilled water, the means of percentage about absorption at 7 d and 28 d were 30.15% and 27.85% for hydrygel, 3.64% and 6.17% for acrylic resin, 0.83% and 0.98% for silicone. The percentage solubility at two stages were 0.79% and 1.16% for hydrygel, 0.86% and 1.01% for acrylic resin, 0.10% and 0.14% for silicone respectively. The conclusion is that the order of percentage about absorption for these three denture soft lining materials were hydrygel > acrylic resin > silicone. The percentage solubility of acrylic resin was higher than that of the other two materials because of the plasticizer existing in crylic resin material. In some degree, the ionic component increased may affect water sorption and solubility. Further clinical demonstration is needed for this hydrygel with higher percentage absorption.