Fracture toughness of packable and conventional composite materials
Fracture toughness of packable and conventional composite materials
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DOI：
10.1067/mpr.2002.128069
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发表时间：
2002-09-01
影响因子：
4.6
通讯作者：
Clelland, N
中科院分区：
文献类型：
--
作者：
Knobloch, LA;Kerby, RE;Clelland, N
问题陈述。可填充复合材料的引入扩大了后牙修复材料的选择范围。与更传统的复合材料替代品相比，目前可用的可包装复合材料的断裂韧性（K-IC）很少有独立研究。目的。本研究评估了 3 种可包装复合材料、2 种传统复合材料和 1 种实验室加工复合材料的相对断裂韧性。材料和方法。本研究测试了六种复合材料。其中包括：3 种可包装复合材料（Alert、SureFil 和 Solitaire）、2 种传统复合材料（Herculite 和 Heliomolar）和 1 种实验室加工复合材料（Belleglass）。 K-IC 的测定方法是，在聚四氟乙烯对开模具中为每种复合材料制备 8 个微型紧凑型测试样本（直径 8.2 毫米 x 厚度 2 毫米），并引入刀片产生的预裂纹。样本在 37°C +/- 2°C 的蒸馏水中保存 7 天。在万能试验机上以 0.5 mm/min 的位移速率进行测试直至断裂。方差分析（P
Statement of problem. The introduction of packable composite has expanded the choices of materials for the restoration of posterior teeth. Few independent studies are available on the fracture toughness (K-IC) of the presently available packable composites compared with more conventional composite alternatives.Purpose. This investigation evaluated the relative fracture toughness of 3 packable composites, 2 conventional composites, and 1 laboratory-processed composite.Material and methods. Six composite materials were tested in this study. These included: 3 packable composites (Alert, SureFil and Solitaire), 2 conventional composites (Herculite and Heliomolar), and 1 laboratory-processed composite (Belleglass). K-IC was determined by preparing 8 mini-compact test specimens (8.2 mm diameter x 2 mm thickness) for each composite in a polytetrafluoroethylene split-mold with introduced precracks created with a razor blade. Specimens were stored in distilled water at 37degrees +/- 2degreesC for 7 days. Testing was performed on a universal testing machine at a displacement rate of 0.5 mm/min until fracture. Analysis of variance (P