Evaluating the color stability of two esthetic ceramic materials after different surface treatments and accelerated aging procedures

Abstract

Aim: The aim of this study was to observe and evaluate the long- and short-term discoloration tendencies of lithium disilicate-based glass-ceramics (IPS e.max CAD LT) and leucite-based feldspathic glass-ceramics (VITA Mark II) materials, which are esthetically very close to each other at first glance.

Methodology: 80 pieces of lithium disilicate and feldspathic blocks (A2 colored) were overglazed and polished separately to evaluate the surface treatment procedures according to CIELAB color coordinates. For accelerated aging purposes, half of the samples were treated with red wine, and the other half were treated with coffee. Color changes were calculated using the ΔE formula. The results were represented as ΔE-1, ΔE-2, and ΔE-3. Data distribution regarding numerical variety and changes was evaluated using the Shapiro-Wilk normality test and Q-Q graphics. 

Results: The data was evaluated using O'Brien clinical color tolerance scales. After 4 weeks of accelerated aging, any of the samples did not show a perfect (ΔE=0-0.5) color match. Both groups have shown significant statistical changes at various rates and percentages.

Conclusion: Since aging procedures affect ceramic systems' ΔE values in a variety of ways, the aging protocol utilizing in vitro aging techniques for color change should be evaluated alongside ceramic type and surface finishing procedures.

How to cite this article:

Gül ÖD, Agüloğlu S. Evaluating the color stability of two esthetic ceramic materials after different surface treatments and accelerated aging procedures. Int Dent Res 2023;13(3)104-11. https://doi.org/10.5577/intdentres.426

Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.