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Current Research in Dental Sciences, vol.34, no.2, pp.84-88, 2024 (Scopus)
Objective: The aim of this study to evaluate the color stability of zirconia-based crown veneered with different materials after artificial aging procedures. Methods: Sixty simple and 60 anatomical designs of cores were milled from yttria-stabilized pre-sintered zirconium oxide blocks for prepared typodont the first premolar. The simple and anatomical cores were divided into 5 subgroups (Layering technique, feldspathic cemented/fused and lithium disilicate cemented/fused). Color measurement was completed via a spectrophotometer with artificial aging procedures. ∆E values were calculated with CIEDE2000 formula. ANOVA was used to evaluate the ∆E values among the groups. Post hoc comparisons between examples were conducted using the Bonferroni test. Results: The ∆E values of the simple core design (1.5±0.5) were significantly lower compared to the anatomical core group (2.89±1.03; P <.05). The layering group ∆E value (2.37±0.56) was significantly less than the other groups in the anatomical core design (P <.05). Additionally, no significant differences existed in the ∆E values between simple core design groups (P >.05). Conclusion: All groups were affected by the artificial aging procedures. The simple core designs and layering technique showed the lowest ∆E values. Also, the cementation and fused techniques did not affect the color change of restorations.