3种表面保护剂对玻璃离子水门汀表面硬度的影响

Influence of three different surface protections on the surface hardness of glass ionomer cement

目的研究不同表面保护剂对玻璃离子水门汀表面硬度的影响,讨论最适于临床应用的防水涂层材料。方法选取3种玻璃离子水门汀为研究对象,分别为KetacT MMolar Easymix、GC FujiⅡLC、KetacTMN100。每种材料制备30个圆盘状样本,随机分为3组:对照组、凡士林涂布组、GLUMA Comfort Bond涂布组。在样本材料完成初期固化后表面涂布表面保护剂,将样本浸于人工唾液中,置于37℃恒温箱中。用显微硬度计分别于1 h、24 h、1周、1月时测定样本的微硬度,每个样本上每次测定5个位置取平均值,记录微硬度值,采用SPSS13.0软件对数据进行t检验。结果对于GC FujiⅡLC,3种表面保护剂对材料微硬度的影响的差异无统计学意义。对于KetacTMMolar Easymix,凡士林涂布组在24 h的微硬度值高于对照组。KetacTMN100的凡士林涂布组在24 h的微硬度值高于GLUMA Comfort Bond涂布组。结论粘接树脂作为表面保护剂在材料表面形成的致密保护膜不利于材料的固化反应,凡士林可作为表面保护剂以提高材料的远期硬度。

Objective To study the influence of surface protection on the surface hardness of glass ionomer cement, discuss the most suitahle surface protection material for the clinical application. Methods Three types of glass ionomer cement were selected as the research objects, namely KetacTM Molar Easymix, GC Fuji II LC, KetaeTM N100. 30 disc-shaped samples of each material were randomly divided into three groups： Control group, vaseline coated group, GLUMA Comfort Bond coated group. The surfaee protection materials were applied after initial setting reaction. The specimens were immersed in artificial saliva, at 37 ℃. Micro-hardness tester was used to test the micro-hardness of the samples at 1 h, 24 h, 1 week, 1 month. In each specimen five indentations were done and the average micro--hardness values were recoarded. The statistical analysis was performed using the SPSS 13.0 statistical package. The measurement data were analyzed hy t test. Results It was found that, for GC Fuji II LC, there was no statistical difference among the micro-hardness value of the samples under three different surface protection materials. While for KetacTM Molar Easymix, the micro-hardness value of the vaseline coated group was higher than that of eontrol group at the 24 h point. 331e micro-hardness value of vaseline coated KetacTM N100 group was higher than that of the GLUMA Comfort Bond coated group at 24 h point. Conclusion The compact protective film formed by the adhesive iesin as a protective agent on the mateial surface is not conducive to the curing action of the material, while vaseline can be used as surface protective agent to enhance the long-term hardness of the material.