Evaluation of shade matching in the repair of indirect restorative materials with universal shade composites

Authors : Büşra KARABULUT GENÇER, Ezgi ACAR, Bilge TARÇIN

Pages : 41-48

Doi:10.26650/eor.20231076495

View : 76 | Download : 8

Publication Date : 2023-01-31

Article Type : Research Paper

Abstract :Purpose To evaluate color differences in repair of indirect ceramic and resin nanoceramic CAD/CAM blocks with two universal shade composites after different surface preparations. Materials and Methods 120 samples were prepared from IPS Empress and GC Cerasmart270 CAD/ CAM blocks and thermocycled insert ignore into journalissuearticles values(5000 cycles, 5°C–55°C);. Initial colors of sample surfaces were measured using a spectrophotometer. Rectangular prism-shaped cavities were prepared and repaired with Tokuyama Universal Bond/Omnichroma and G-Multiprimer/G-Premio/Essentia Universal following surface preparation with aluminum oxide, Cojet, and bioactive glass insert ignore into journalissuearticles values(Sylc);. Repaired samples were thermocycled insert ignore into journalissuearticles values(5000 cycles); and color measurement was performed. Color coordinates L*a*b* were recorded, and color differences were calculated using the CIELab formula. Color differences between pre-and post-repair insert ignore into journalissuearticles values(∆E1); and between post-repair and post-aging insert ignore into journalissuearticles values(∆E2); were determined. Data were analyzed using Three-way ANOVA with a significance level set at p<0.05. Results ∆E1 values in all subgroups exceeded the threshold of 3.3. No significant difference was found between the surface preparation processes regarding ∆E1 values. There was no significant difference between the composites and bonding agents in ∆E1 values, except for Cerasmart/Sylc and Empress/Sylc groups. No statistically significant difference was detected in ∆E2 values between the surface preparation treatments in all groups. insert ignore into journalissuearticles values(p>0.05);. Conclusion Color match of the universal shade composites, which are preferred to increase the esthetic satisfaction and to simplify repair procedures, were found above the acceptable threshold. Post-aging color stability of universal shade composites was below the acceptable threshold.
Keywords : Dental restoration repair, Color, Composite resin, CAD CAM, Surface preparation

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