Background Colour and Coping Thickness Key to Zirconia Veneer Shade Accuracy: Study

Using 1.5 mm CAD-CAM zirconia ceramic can achieve PT when the background colour is ND5, ND7, ND8. ΔE between the 1.5 mm LT SCs and the A2 shade guide is mostly within the AT range. ΔE between SCs and A2 shade guide showed a positive association with ND9 and negative associations with ND4, ND5, 1.5 mm, 1.0 mm, LT, and BL (p < 0.001). ΔE between SCs and A3 shade guide correlated positively with ND4, ND5, and ND9 but negatively with 1.5 mm, 1.0 mm, and LT (p < 0.001). Each factor differentially influenced the final colour, with background colour being the most significant, followed by coping thickness.

Two formulas can be used to predicted ΔE between the restoration for discoloured teeth using zirconia veneers and the target shade (A2 or A3). The proposed formulas facilitate colour prediction in zirconia veneers for discoloured teeth, enhancing clinical aesthetic outcomes.

Reference:

Yanlin Xia, Jiakang Zhu, Wenxiang Wang, Shanshan Liang, Cui Huang, Colour prediction for restoring discoloured teeth using zirconia veneers, Journal of Dentistry, 2025, 105902, ISSN 0300-5712, https://doi.org/10.1016/j.jdent.2025.105902.