Evaluación comparativa in vitro : cambio de color en carillas indirectas usando cemento dual y fotopolimerizable.

Abstract

Introduction: Color stability is a determining factor in selecting the type of cement for aesthetic restorations. The choice of cement is crucial as it impacts the long-term appearance of restorations. Objective: To determine whether there are differences in the color stability of indirect veneers cemented with dual-cure resin cement versus light-cure resin cement. Materials and Methods: A quasi experimental in vitro study with a quantitative, descriptive, and observational approach. Dental preparations were made for subsequent scanning and design. Lithium disilicate blocks (C14), color HT BL2, were used. Light-cure and dual-cure cement were applied. Color registration was performed initially, after cementation, and after thermocycling through photographic recording and Photoshop analysis. Results: After cementation, within Group A, the ΔE values ranged from 19.21 to 32, indicating a variable but less drastic color change. In Group B, ΔE values were consistently higher (max 34.07), suggesting that dual-cure cement produces more noticeable color changes. After thermocycling, Group B showed generally more pronounced color changes (ΔE 19.13) compared to Group A. Conclusion: Color changes in lithium disilicate veneers during cementation and thermocycling depend largely on the type of cement used. Cementation led to a perceptible darkening of the veneers in both groups, with a slight tendency toward yellowish tones. However, changes were more pronounced in Group B.