Cement opacity and color as influencing factors on the final shade of metal-free ceramic restorations
Research output: Contribution to journal › Article › peer-review
Materials and Methods: Five resin cement colors in combination with four different thicknesses of CAD/CAM ceramic materials were tested, and a composite substrate was used as dentin color reference (n = 3). Specimen color was measured with a spectrophotometer equipped with an integrating sphere before and after cementation (CIELAB). Cement and ceramic color and opacity (TP) were assessed by measuring the tested ceramic thickness as a 1‐mm thick disk for each of the cement shades. The differences in color were evaluated (ΔE00). Data were statistically analyzed by a Two‐Way ANOVA followed by the Tukey Test for post‐hoc comparison (P < .05) and multiple comparison Pearson's test (P < .05); the acceptability and perceptibility threshold were evaluated.
Results: Statistically significant influence was found for factors ceramic thickness and cement shade (P < .001). Perceptible and unacceptable color changes were induced on the final restoration by resin cements (ranging from ΔE00 = 0.69 ± 0.54 to ΔE00 = 5.53 ± 0.46), the correlation between factors became strong (r2 > 0.6) in case of mismatch between color and translucency of cement and ceramic. Only the clear shade in combination with the thickest ceramic, resulted in an imperceptible color change (ΔE00 = 0.69 ± 0.54).
Conclusions: The final shade of ceramic restorations can be influenced by resin cements; the magnitude of influence is related to the cement optical properties.
Clinical Significance: In order to influence the final shade of a ceramic restoration, a cement more opaque than the restorative material should be used. Conversely, in the case of a fitting shade of the restoration, a cement more translucent than the restoration should be used to avoid undesired changes.
|Number of pages||7|
|Journal||Journal of Esthetic and Restorative Dentistry|
|Early online date||13 Apr 2020|
|Publication status||Early online - 13 Apr 2020|
- Manuscript cement influence FINAL ACCEPTED COMPLETE
Rights statement: This is the peer reviewed version of the following article: Carrabba, M, Vichi, A, Tozzi, G, Louca, C, Ferrari, M. Cement opacity and color as influencing factors on the final shade of metal‐free ceramic restorations. J Esthet Restor Dent. 2020; 1– 7, which has been published in final form at https://doi.org/10.1111/jerd.12587. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Accepted author manuscript (Post-print), 481 KB, PDF document
Due to publisher’s copyright restrictions, this document is not freely available to download from this website until: 13/04/21