自制桩核树脂机械性能的比较研究  

Comparative study on mechanical properties of self-made core resin

作　　者：何薇[1] 张振庭[1] 刘亦然[1] 梁新杰 李德慧 徐晓溪[1] 张玮琬 

机构地区：[1]首都医科大学口腔医学院,北京100050 [2]北京安泰生物科技股份有限公司

出　　处：《北京口腔医学》2014年第1期9-12,共4页Beijing Journal of Stomatology

基　　金：北京市教育委员会基金项目(112227)

摘　　要：目的对比3种自制桩核树脂与3种双固化进口桩核树脂的机械性能。方法将纳米SiO2与玻璃粉作为填料,以3种比例分散于不同基质中,组1:SiO2填料直径为50nm,基质添加BisEMA6;组2:SiO2填料直径为12nm和50nm,基质添加BisEMA6;组3:SiO2填料直径为12nm和50nm,基质添加BisEMA。测定比较3组自制桩核树脂和3种双固化进口桩核树脂的挠曲强度、抗压强度、断裂面微观结构。结果自制组2、3的挠曲强度与3组双固化进口树脂无显著差异(P>0.05),抗压强度高于后者(P<0.05),断裂面微观结构与后者相似;自制组1挠曲强度、抗压强度较自制组2、3低(P<0.05),断裂面微观结构不同。结论添加BisEMA、BisEMA6的基质分别与含有12nm SiO2的填料自行配制的纳米桩核树脂,挠曲强度达到进口树脂水平,抗压强度高于进口树脂水平。Objective To compare the mechanical properties of several kinds of self-made core resin with imported core resin. Methods Nano-Si02 and glass powder were added to different organic matrix by various proportions, to develop 3 groups of nanocomposite core resin. Group 1 ： matrix with BisEMA6, Nano-SiO2 （diameter： 50nm） ; Group 2： matrix with BisEMA6, Nano-SiO2 （ diameters： 12nm and 50nm） ; Group 3： matrix with BisEMA, Nano-SiO2 （ diameters： 12nm and 50nm） .The flexural strength and compressive strength of self-made and imported resin were evaluated and compared. Results The flexural strength of group 2 and 3 was not significantly different with that of the imported core resin （P 〉 0. 05）, but the compressive strength was much higher in group 2 and 3 than in imported resin （P 〈 O. 05 ）. The flexural strength and compressive strength of group 1 was significantly lower than that of group 2 and 3. Conclusion The self-made core resin containing BisEMA, BisEMA6 and 12nm SiO2 presents as high flexural strength as the imported core resin but has higher compressive strength than imported core resin.

关 键 词：桩核树脂 纳米材料 挠曲强度 抗压强度 

分 类 号：R783.1[医药卫生—口腔医学]