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Colour prediction for restoring discoloured teeth using zirconia veneers
Yanlin Xia1, Jiakang Zhu1, Wenxiang Wang1
1State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, PR China.
Journal of Dentistry
|June 15, 2025
Summary
Predicting final restoration color with zirconia veneers is now possible. New formulas account for factors like background shade and zirconia thickness, improving aesthetic outcomes for discolored teeth.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Aesthetic dentistry
Background:
- Accurate shade matching is crucial for aesthetic dental restorations.
- Zirconia veneers offer a promising solution for discolored teeth.
- Predicting the final color of zirconia restorations remains a clinical challenge.
Purpose of the Study:
- To develop predictive formulas for the final color of zirconia veneer restorations.
- To identify key factors influencing color outcomes in discolored teeth restorations.
- To establish a clinically practical method for color difference (ΔE) prediction.
Main Methods:
- Assessed coping thickness, translucency, background color, and luting cement shade.
- Employed statistical analyses including ANOVA and Automatic Linear Modeling (p < 0.05).
- Evaluated color differences (ΔE) against perceptibility (PT) and acceptability (AT) thresholds.
Main Results:
- Most discolored teeth could achieve A2 or A3 target shades with 1.5 mm zirconia.
- Background color was the most significant factor influencing final restoration color.
- Predictive formulas showed strong correlations with factors like background shade and coping thickness (p < 0.001).
Conclusions:
- Background color and coping thickness significantly impact final zirconia veneer color.
- Two predictive formulas can accurately estimate color differences for A2 and A3 shades.
- The formulas enhance clinical predictability and aesthetic results for zirconia restorations.
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