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首页> 外文期刊>Journal of prosthodontics: official journal of the American College of Prosthodontists >Diametral Tensile and Compressive Strengths of Several Types of Core Materials.
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Diametral Tensile and Compressive Strengths of Several Types of Core Materials.

机译：几种芯材的径向拉伸强度和抗压强度。

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Purpose: Compressive and diametral tensile strengths (DTSs) of core materials are thought to be important, because cores usually replace a large bulk of tooth structure and should provide sufficient strength to resist intraoral tensile and compressive forces. This study was undertaken to compare the mechanical properties of materials used for direct core foundations. Material and Methods: The differences between the compressive and DTSs of six core materials, including Duralloy (high-copper amalgam), Grandio (visible light-cured nanohybrid resin composite), Admira (organically modified ceramic), Filtek P60 (packable composite resin), Rebilda DC (dual-cure adhesive core material), and Argion Molar (silver-reinforced glass ionomer cement), were tested. A total of 120 specimens, half for the compressive strength (CS) test (6 mm in height, 4 mm in diameter) and the other half for the DTS test (6 mm in diameter, 3 mm in thickness), were prepared. The specimens were stored at room temperature in distilled water for 7 days. The Lloyd testing machine was used to load the specimens at a crosshead speed 0.5 cm/min, and the strength values were determined in MPa. Results: The compressive and DTS test values (in MPa), respectively, of the materials were: Admira (361, 44); Filtek P60 (331, 55); Grandio (294, 53); Rebilda DC (279, 42); Duralloy (184, 40); and Argion Molar (107, 9). Kruskal-Wallis test was computed, and multiple comparisons test discerned many differences among materials (p < 0.05). Conclusion: Packable composite resin (Filtek P60), visible light cured nanohybrid resin composite (Grandio), and organically-modified ceramic (Admira) had higher compressive and DTS values than the other materials.
机译：目的：核心材料的抗压强度和径向抗张强度（DTS）被认为很重要，因为核心通常会取代大量的牙齿结构，并且应提供足够的强度以抵抗口腔内的抗张和压缩力。进行这项研究以比较用于直接芯基础的材料的机械性能。材料和方法：六种核心材料的压缩和DTS之间的差异，包括Duralloy（高铜汞合金），Grandio（可见光固化纳米杂化树脂复合材料），Admira（有机改性陶瓷），Filtek P60（可包装复合树脂） ，Rebilda DC（双固化胶芯材料）和Argion Molar（银增强玻璃离聚物水泥）进行了测试。总共准备了120个样品，一半用于抗压强度（CS）测试（高6毫米，直径4毫米），另一半用于DTS测试（直径6毫米，厚度3毫米）。将样品在室温下在蒸馏水中保存7天。使用劳埃德（Lloyd）测试机以0.5厘米/分钟的十字头速度加载样品，并以MPa为单位确定强度值。结果：材料的压缩和DTS测试值（以MPa为单位）分别为：Admira（361，44）; Filtek P60（331，55）;格兰迪欧（294，53）;雷比尔达（279，42）;杜拉洛伊（184，40）;和Argion Molar（107，9）。计算了Kruskal-Wallis检验，多次比较检验发现材料之间存在许多差异（p <0.05）。结论：可填充的复合树脂（Filtek P60），可见光固化的纳米混合树脂复合物（Grandio）和有机改性的陶瓷（Admira）具有比其他材料更高的压缩和DTS值。

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