摘要
目的评价四种玻璃离子水门汀的溶解性,探讨浸泡液pH值的不同对玻璃离子水门汀溶解性的影响。方法将四种玻璃离子水门汀制成直径15mm、厚1mm表面光滑平整的圆片共120个(试件分为S组、F组、D组、A组),Paffenbarger重量法测定各组试件在三种浸泡液中的重量改变。结果S组、D组和A组在乳酸液中的溶解值高于其它两种浸泡液中的溶解值(P<0.05);而F组在三种浸泡液中的溶解值差异无显著性。结论浸泡液pH值对玻璃离子溶解性有影响;玻璃离子水门汀所表现出的对浸泡液pH值的敏感性可能与玻璃离子本身的化学组成及亲水性有关。
Objective This study was to assess the solubility of four GICs by Paffenbarger＇s weight test, to determine whether pH of the solution had any influence on the solubility behavior of GICs. Methods 120 standardized flat discs （diameter of 15mm, thickness of lmm） were divided into four groups of thirty and described as S group, F group, D group, A group. Specimens were desiccated to a constant mass and then placed in distilled water, artificial saliva and lactic acid. The weight changes of the specimens were measured using an electronic analytical balance. Results The pH of the solution seems to have an influence on the solubility behavior of some GICs. S group, D group and A group has higher solubility in lactic acid than in distilled water and artificial saliva （P〈0.05）. However, there was no difference among the three solutions in F group and D group （P〉0.05）. Conclusions pH of the solution has no significant influence on the solubility behavior of GICs. The sensitivity of the solubility behavior to pH of the materials tested seemed to be related to the chemical composition and the hydrophilicity of GICs.
出处
《口腔材料器械杂志》
2007年第1期15-17,共3页
Chinese Journal of Dental Materials and Devices
