Effect of Different Repolishing Procedures on The Color Change of Alkasite

Abstract

Objectives: An esthetic restoration with an unacceptable color is the main cause for replacement of anterior tooth restorations. The aim of this study is to evaluate the effect of repolishing on the color change of the new material group of alkasite after exposure to coffee solution. Materials and Methods: Alkasite material placed in Teflon molds with a diameter of 8 mm and a height of 2 mm was polymerized under the application of mylar strip and a total of 32 samples were obtained. The samples were randomly immersion into groups. Group R: Diamond grained polishing rubbers, Group D: Aluminum oxide discs are applied and the polishing process is completed. After the first color measurement was made, it was immersed in coffee and the measurement was repeated 1 week later. L was divided into two groups (n=8) and repolished with rubber (RR) and discs (RD). In the D group, re-polishing was done with rubber (DR) and disc (DD) and color measurements were repeated. Results were analyzed by using one-way ANOVA and Tukey test at 95% confidence interval. Results: The greatest color change (ΔE00) was in group R. At the end of seven days, similar color change values were found between the groups of R and D (p > 0.05). There is no difference between the RR and RD groups. Significantly less color change was observed in the DD group than in the RR and RD groups (p = .003, p = .042, respectively). Similarly, the DR group showed less color change than the RR group (p = .015). Conclusions: The color stability of the alkasite was affected by the polishing procedure. The repolishing process reduced the color change, but not at a clinically acceptable level.

The effects of different repolishing procedures on the color change of bulk-fill resin composites

“…Discoloration in composites can be due to internal and external factors. Internal factors include self-coloring of the resin material and oxidation or hydrolysis in the resin matrix ( 4 ). External factors such as discoloration resulting from exposure to coloring agents and their absorption by the material, as well as the degree of staining varying with oral use, can cause changes in resin-based materials.…”

“…The surface texture of a tooth-colored restoration can have a significant impact on plaque formation, discoloration, wear, and the overall esthetic appearance of the restoration. Therefore, proper finishing and polishing are critical procedures that can increase both the aesthetics and lifespan of restored teeth ( 4 ). Recent studies have shown that resin composites, which are commonly used for tooth restoration exhibit less discoloration after finishing and repolishing ( 3 , 4 ).…”

“…Therefore, proper finishing and polishing are critical procedures that can increase both the aesthetics and lifespan of restored teeth ( 4 ). Recent studies have shown that resin composites, which are commonly used for tooth restoration exhibit less discoloration after finishing and repolishing ( 3 , 4 ). Studies examining the color stability of the resin materials after repolishing procedures are limited.…”