【摘要】 目的:采用三点弯曲实验的方法测量3种复合树脂核材料的弯曲强度。方法:本实验使用的3种复合树脂核材料分别为DCFlowCore、Bisfil-Core和LuxaCore。每种材料各制作6个大小为(2.0±0.1)mm×(3.0±0.1)mm×(25.0±0.1)mm的矩形试件。试件在Instron万能材料测试机上测试其弯曲强度,跨距为(20.0±0.1)mm,加载速度为0.5mm/min,使用单因素方差分析对测量数据进行统计学检验。结果:3种材料的弯曲强度值分别为:DCFlowCore(137.96±9.48)MPa,Bisfil-Core(123.82±12.99)MPa,LuxaCore(110.11±10.03)MPa。统计检验的结果显示,DCFlowCore与Bisfil-Core之间(P<0.041)、DCFlowCore与LuxaCore之间(P<0.001)、Bisfil-Core与LuxaCore之间(P<0.047)均有显著性差异。结论:从本实验的结果来看,3种核材料的弯曲强度均可以满足临床需要,以DCFlowCore的弯曲强度值最高。更多还原

【Abstract】 Objective: This study was used to evaluate the flexural strength of three kinds of resin composite core materials with a method of three-point bending test. Method: The three kinds of resin composite materials, DC Flow Core, Bisfil -Core and LuxaCore, were used in this study. For each material, six rectangular specimens (the sizes 2.0×3.0×25.0) were fabricated. The flexural strength was measured on Instron Universal Testing machine at a crosshead speed of 0.5mm/min. Data were collected and analyzed by ANOVA. Results: Flexural strength of three materials as follows: DC Flow Core 137.96±9.48 MPa,Bisfil-Core 123.82±12.99 MPa,LuxaCore 110.11±10.03MPa. Flexural strength of DC Flow Core was significantly higher than Bisfil-Core( P <0.041) and LuxaCore( P <0.001), and Bisfil-Core was significantly stronger than LuxaCore( P <0.047). Conclusions: In this study, all three materials were found to meet the clinical need in terms of flexural strength. DC Flow Core had the highest flexural strength among three materials.更多还原