Effect of thermomechanical aging on the surface roughness and color stability of novel CAD-CAM materials: An in-vitro study

Authors : Almira Ada DİKEN TÜRKSAYAR, Mustafa Borga DÖNMEZ, Duygu HİSARBEYLİ, Özlem SEÇKİN KELTEN

Pages : 385-390

Doi:10.33808/clinexphealthsci.1112365

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Publication Date : 2023-06-15

Article Type : Research Paper

Abstract :Objective:. This in-vitro study aimed to evaluate the surface roughness insert ignore into journalissuearticles values(Ra); and color stability of novel monolithic CAD-CAM materials after thermomechanical aging. Methods: Forty specimens were obtained from 4 different materials insert ignore into journalissuearticles values(a resilient ceramic insert ignore into journalissuearticles values(C);, ceramic-reinforced PEEK insert ignore into journalissuearticles values(BH);, lithium disilicate glass ceramic insert ignore into journalissuearticles values(EX);, and a resin based composites insert ignore into journalissuearticles values(B); insert ignore into journalissuearticles values(n=10);. Initial Ra and color coordinates were recorded. All specimens were than subjected to thermomechanical aging. Ra and color coordinate measurements were repeated. CIEDE2000 formula was used to calculate the color changes insert ignore into journalissuearticles values(ΔE00);. Kruskal-Wallis and Dunn tests were used to analyze data, while the effect of aging on Ra was analyzed with Wilcoxon test insert ignore into journalissuearticles values(α=.05);. Results: Regardless of aging, BH showed higher Ra than EX insert ignore into journalissuearticles values(P .05);. Ra of ceramic-reinforced PEEK was above clinical threshold, regardless of thermomechanical aging. Conclusion: Thermomechanical aging caused a color change that was perceptible for all the materials tested, while it was also unacceptable for ceramic-reinforced PEEK.
Keywords : CAD CAM, dental materials, roughness, color