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Effect of finishing methods on surface roughness and color stability in all-ceramic systems

机译:精加工方法对全陶瓷系统表面粗糙度和颜色稳定性的影响

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摘要

The objectives of the study were to evaluate the effect of the finishing methods on the surface roughness, and to investigate changes in CIE L*a*b* color coordinates of all-ceramic systems after different finishing methods and accelerated aging. Sixty specimens were prepared, 20 specimens each for Vitadur-N, IPS Empress II, and Cerec Vita Block Mark II. The surface roughness (Ra) following treatment with the different finishing methods was measured using a profilometer. Surface examinations in all groups were made by using a scanning electronic microscope. CIE L*a*b* values of the specimens were determined. After all specimens were subjected to accelerated aging, color measurements were repeated, and the total color differences (ΔE) were calculated. Data were analyzed statistically. Significant differences in surface roughness among all-ceramics were found (P < 0.05). No significant differences were found between the surface roughness of the glazed and polished all-ceramics (P > 0.05). After accelerated aging, all groups had acceptable color changes (ΔE < 2).
机译:该研究的目的是评估精加工方法对表面粗糙度的影响,并研究不同精加工方法和加速老化后全陶瓷系统的CIE L * a * b *颜色坐标的变化。准备了60个样本,每个样本20个,分别用于Vitadur-N,IPS Empress II和Cerec Vita Block Mark II。使用轮廓仪测量用不同的精加工方法处理后的表面粗糙度(Ra)。所有组的表面检查均使用扫描电子显微镜进行。确定样品的CIE L * a * b *值。在所有样品都经过加速老化后,重复进行颜色测量,并计算总色差(ΔE)。对数据进行统计分析。发现所有陶瓷之间的表面粗糙度有显着差异(P <0.05)。釉面和抛光全瓷的表面粗糙度之间没有发现显着差异(P> 0.05)。加速老化后,所有组的颜色变化均可接受(ΔE<2)。

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