The Effect of Repeated Firings on the Color Change of Metal Based Ceramics Produced with Different Techniques

Authors : Mehmet Gökberkkaan DEMİREL, Ali Riza TUNCDEMİR

Pages : 67-74

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Publication Date : 2023-08-28

Article Type : Research Paper

Abstract :Aim: The purpose of this study was to compare the effects of repeated firings on the color change of metal-ceramic restorations with different porcelain thicknesses and metal coping fabrication methods. Material and Methods: A total of 30 disc-shaped samples of 1 mm thickness and 13 mm diameter were produced using selective laser melting insert ignore into journalissuearticles values(SLM); and conventional casting insert ignore into journalissuearticles values(CC); methods. Feldspathic porcelain in thicknesses of 0.7, 1.2 and 1.7 mm were then applied to each group insert ignore into journalissuearticles values(n = 10);. Each sample was subjected to five firing processes. After each repeated firing process, color measurement was performed using a spectrophotometer. One-way analysis of variance was used for the statistical analyses and Tukey’s test was used for post-hoc analyses insert ignore into journalissuearticles values(p = 0.05);. Results: There were significant differences in color changes both groups insert ignore into journalissuearticles values(p < 0.05);. The SLM samples underwent more color changes than the CC samples. Conclusion: As a result of the study it was determined that repeated firings and an increase in the porcelain thickness enhanced color changes. Moreover, the color of SLM samples changed more than the CC samples.
Keywords : Porselen kalınlığı, Renk değişimi, Selektif lazer ergitme, Spektrofotometre, Tekrarlanan fırınlama