树脂微硬度纵向体积填充评估

Fernanda Santos Araújo, W. M. Takeshita, R. C. D. Amaral, Adriano Augusto Melo de Mendonça
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引用次数: 0

摘要

目的:本研究旨在评估体积填充复合树脂在纵向微硬度方面的聚合效果。方法:对厚度为 6 毫米的块状体填充复合树脂进行维氏硬度分析:用维氏硬度分析厚度为 6 毫米的块状填充复合树脂。树脂块分为两组(n=6):AURA 树脂和 OPUS 树脂。显微硬度测试分别在从树脂块顶部开始的 2 毫米、4 毫米和 6 毫米距离处进行(底部和顶部)和(纵向显微硬度)切片之前和之后进行。将平均显微硬度值制成表格,并进行方差分析和 Tukey 检验(P<0.05)。结果OPUS 体积填充树脂样品的显微硬度平均值分别为 55.9 kgf/mm2、53.7 kgf/mm2 和 49.3 kgf/mm2,AURA 体积填充树脂样品在距离 2 mm、4 mm 和 6 mm 处的显微硬度平均值分别为 57.02 kgf/mm2、55.86 kgf/mm2 和 51.77 kgf/mm2。Tukey 统计检验表明,每种树脂在 2 毫米、4 毫米和 6 毫米的不同距离上的显微硬度值差异显著(p<0.001)。尽管在所评估的组内和组间存在显著的统计学差异,但所有样品在块体顶部和底部的聚合效果都有比较。结论所研究的两种树脂在不同厚度(2 毫米、4 毫米和 6 毫米)下的聚合均有效。在比较底部和顶部时,显微硬度比是适当的。
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Assessment of bulk-fill of resins microhardness longitudinal
Aim: This study aimed to assess the polymerization effectiveness of bulk-fill composite resins in longitudinal microhardness. Methods: Blocks of bulk-fill composite resin with thicknesses of 6 mm were analyzed with Vickers microhardness. The resin blocks were divided into two groups (n=6): resin AURA and OPUS. The microhardness test was performed before (base and top) and after (longitudinal microhardness) sectioning the blocks at distances of 2 mm,  4 mm, and 6 mm from the top of the block. The mean microhardness values were tabulated and subjected to ANOVA followed by Tukey’s test (p<0.05). Results: The OPUS bulk-fill resin samples presented microhardness means of 55.9 kgf/mm2, 53.7 kgf/mm2, and 49.3 kgf/mm2, the AURA bulk-fill resin samples presented microhardness means of 57,02 kgf/mm2, 55,86 kgf/mm2 e 51,77 kgf/mm2 for the distances of 2 mm, 4 mm, and 6 mm, respectively. Tukey’s statistical test showed a significant difference in microhardness values at different distances of 2 mm,  4 mm, and 6 mm (p<0.001) for each resin. Although there was a statistically significant difference within and between the groups assessed, all samples showed polymerization effectiveness when comparing the top and base of the block. Conclusion: Polymerization was effective in different thicknesses (2 mm, 4 mm, and 6 mm) in both resins studied. The microhardness ratio was adequate when comparing the base and top.
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