Effect of different polishing systems on surface roughness and color stability of lithium disilicate ceramics

Fatma Makkeyah, Mahmoud Al Ankily
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Abstract

Objective: This study aimed to investigate the effect of two polishing systems on the surface roughness and color stability of lithium disilicate ceramic. Materials and Methods: Forty disc-shaped lithium disilicate samples were constructed and cemented into a cavity prepared onto the labial surface of freshly extracted bovine teeth; The samples were divided into four groups (10 samples per group); C: Control, SS: Scaling only, SE: Scaling followed by polishing using Eve Diapro lithium disilicate polishers, SD: Scaling followed by polishing using Diatech ShapeGuard ceramic polishing plus kit. The surface roughness was measured before scaling, after scaling and finally after the polishing procedure. The color parameters were measured before and after the staining procedures using VITA Easyshade Advance 4.0 according to the CIE L*a*b* color order system. Results: Both polishing systems significantly decreased the surface roughness of the disilicate ceramic and was accompanied by a significant decrease in the color change. However, the color change in the polished group was significantly higher than that of the control glazed group. Conclusion: The surface roughness and color stability of lithium disilicate ceramics can be enhanced by recent polishing systems, however, it shows different topography than the glazed ceramic surface.
不同抛光体系对二硅酸锂陶瓷表面粗糙度和颜色稳定性的影响
目的:研究两种抛光系统对二硅酸锂陶瓷表面粗糙度和颜色稳定性的影响。材料与方法:制备了40个圆盘状二硅酸锂样品,并将其粘接到新拔牛牙唇面制备的空腔中;样本分为四组(每组10个样本);C:控制,SS:仅除垢,SE:除垢后使用Eve Diapro二硅酸锂抛光剂抛光,SD:除垢后使用Diatech ShapeGuard陶瓷抛光加套件抛光。在结垢前、结垢后和抛光后测量表面粗糙度。根据CIE L*a*b*颜色顺序系统,使用VITA Easyshade Advance 4.0测量染色前后的颜色参数。结果:两种抛光系统都显著降低了二硅酸陶瓷的表面粗糙度,并伴随着颜色变化的显著减少。然而,抛光组的颜色变化明显高于对照组。结论:最新的抛光系统可以提高二硅酸锂陶瓷的表面粗糙度和颜色稳定性,但其表面形貌与釉面陶瓷表面不同。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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