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首页> 外文期刊>The Journal of Prosthetic Dentistry >A comparison of the wear resistance and hardness of indirect composite resins.
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A comparison of the wear resistance and hardness of indirect composite resins.

机译：间接复合树脂的耐磨性和硬度的比较。

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STATEMENT OF PROBLEM: Various new, second-generation indirect composites have been developed with claimed advantages over existing tooth-colored restorative materials. To date, little independent research has been published on these materials, and the properties specified in the advertising materials are largely derived from in-house or contracted testing. PURPOSE: Four second-generation indirect composites (Artglass, belleGlass, Sculpture, and Targis) were tested for wear resistance and hardness against 2 control materials with well-documented clinical application. Human enamel was also tested for comparison. MATERIAL AND METHODS: Twelve specimens of each material were fabricated according to the manufacturers' directions and subjected to accelerated wear in a 3-body abrasion, toothbrushing apparatus. Vickers hardness was measured for each of the tested materials, and energy dispersive x-ray (EDX) spectroscopy was performed to determine the elemental composition of the composite fillers. The statistical tests used for wear and hardness were the Kruskal-Wallis 1-way ANOVA test with Mann-Whitney tests and 1-way ANOVA with multiple comparisons (Tukey HSD). The Pearson correlation coefficient was used to determine the existence of a relationship between the hardness of the materials and the degree to which they had worn. The level of statistical significance chosen was alpha=.05. RESULTS: The control material Concept was superior to the other composites in wear resistance and hardness and had the lowest surface roughness. Significant relationships were observed between depth of wear and hardness and between depth of wear and average surface roughness. Enamel specimens were harder and more wear resistant than any of the composites. EDX spectroscopy revealed that the elemental composition of the fillers of the 4 new composites was almost identical, as was the composition of the 2 control composites. CONCLUSION: The differences in wear, hardness, and average surface roughness may have been due to differences in the chemistry or method of polymerization of the composites. Further research in this area should be encouraged. It was also apparent that the filler present in the tested composites did not exactly fit the manufacturers' descriptions.
机译：问题陈述：已经开发了各种新型的第二代间接复合材料，它们具有优于现有牙齿着色修复材料的优势。迄今为止，很少有关于这些材料的独立研究发表，并且广告材料中指定的特性主要来自内部或合同规定的测试。目的：测试了四种第二代间接复合材料（Artglass，belleGlass，Sculpture和Targis）对两种对照材料的耐磨性和硬度，并有充分证明的临床应用。还测试了人类牙釉质以进行比较。材料和方法：每种材料的十二个样品是按照制造商的说明制造的，并在三体式磨损牙刷设备中经受加速磨损。测量每种测试材料的维氏硬度，并进行能量色散X射线（EDX）光谱分析以确定复合填料的元素组成。用于磨损和硬度的统计检验是采用Mann-Whitney检验的Kruskal-Wallis 1次方差分析和多次比较的1次方差分析（Tukey HSD）。皮尔逊相关系数用于确定材料的硬度与它们的磨损程度之间是否存在关系。选择的统计显着性水平为alpha = .05。结果：对照材料Concept在耐磨性和硬度方面优于其他复合材料，并且具有最低的表面粗糙度。在磨损深度和硬度之间以及磨损深度和平均表面粗糙度之间观察到显着的关系。搪瓷样品比任何复合材料都更硬，耐磨性更高。 EDX光谱显示，这4种新复合材料的填料的元素组成几乎相同，而2种对照复合材料的组成也几乎相同。结论：磨损，硬度和平均表面粗糙度的差异可能是由于复合材料的化学或聚合方法不同所致。应鼓励在这一领域进行进一步研究。同样明显的是，存在于测试复合物中的填料并不完全符合制造商的描述。

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