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首页> 外文期刊>The Journal of Prosthetic Dentistry >Fracture toughness of packable and conventional composite materials.
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Fracture toughness of packable and conventional composite materials.

机译：可包装和常规复合材料的断裂韧性。

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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 37 degrees +/- 2 degrees C 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<.0001) and Ryan-Einot-Gabriel-Welsch multiple range tests (P<.05) were performed on all data Results. The mean fracture toughness of Alert (1.57 Mpa.m(1/2)) was significantly greater than any of the other composites tested. Solitaire, a packable composite, exhibited a mean fracture toughness (0.67 MPa.m(1/2)) that was significantly lower than any of the other materials tested. No significant difference was noted between Belleglass (1.27 MPa.m(1/2)), SureFil (1.25 MPa.m(1/2)) and Herculite (1.16 MPa.m(1/2)). Conclusion. Within the limitations of this study, the glass fiber-reinforced packable composite exhibited improved fracture toughness when compared with the other composite materials tested.
机译：问题陈述。可包装复合材料的引入扩大了后牙修复的材料选择。与更常规的复合材料替代品相比，目前很少有关于当前可包装复合材料的断裂韧性（K（IC））的独立研究。目的。这项研究评估了3种可填充复合材料，2种常规复合材料和1种实验室加工的复合材料的相对断裂韧性。材料与方法。在这项研究中测试了六种复合材料。其中包括：3种可包装的复合材料（Alert，SureFil和Solitaire），2种常规复合材料（Herculite和Heliomolar）和1种实验室加工的复合材料（Belleglass）。通过在聚四氟乙烯裂模中为每种复合材料准备8个微型试验样品（直径为8.2 mm直径x 2 mm厚度）来确定K（IC），并用剃须刀产生引入的预裂纹。将样品在37℃+/- 2℃的蒸馏水中保存7天。在万能试验机上以0.5mm / min的位移速率进行试验直至断裂。对所有数据结果进行方差分析（P <.0001）和Ryan-Einot-Gabriel-Welsch多范围检验（P <.05）。 Alert的平均断裂韧性（1.57 Mpa.m（1/2））显着大于任何其他测试的复合材料。接龙是一种可包装的复合材料，表现出的平均断裂韧性（0.67 MPa.m（1/2））显着低于任何其他测试材料。 Belleglass（1.27 MPa.m（1/2）），SureFil（1.25 MPa.m（1/2））和Herculite（1.16 MPa.m（1/2））之间没有显着差异。结论。在这项研究的限制内，与其他测试的复合材料相比，玻璃纤维增​​强的可包装复合材料表现出改善的断裂韧性。

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