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.
出处
《北京口腔医学》
CAS
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)
关键词
桩核树脂
纳米材料
挠曲强度
抗压强度
Core resin
Nano material
Flexural strength
Compressive strength