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Intra- and inter-brand color differences of denture teeth under different illuminations.
Nick Polychronakis1, Panagiotis Lagouvardos2, Gregory Polyzois1
1Department of Prosthodontics, School of Dentistry, National & Kapodistrian University of Athens, Athens, Greece.
Journal of Applied Oral Science : Revista FOB
|May 14, 2020
Summary
Denture teeth color varies significantly between and within brands under different lighting conditions, impacting shade matching. Executive brand showed the most color stability, making it preferable for clinical use when mixing brands is unavoidable.
Area of Science:
- Dental Materials Science
- Color Science in Prosthodontics
Background:
- Denture teeth replacement is common due to debonding, staining, and wear.
- Color discrepancies in denture teeth can lead to unacceptable metamerism under specific lighting.
Purpose of the Study:
- To investigate color differences among and within four brands of denture teeth under various illumination conditions.
- To assess the impact of hydration state on denture tooth color stability.
Main Methods:
- Four brands of A3 shade denture teeth were selected.
- CIELAB color coordinates were measured under D65, F2, and A illuminations in dry and wet states.
- Color differences (ΔE*ab) were calculated and statistically analyzed using 3-way ANOVA, Friedman's, and Wilcoxon's tests.
Main Results:
- Brand type significantly affected L*, a*, and b* color coordinates (p<0.0001).
- Illumination type significantly affected a* and b* coordinates (p<0.0001).
- Intra-brand differences ranged from 0.21-0.78ΔΕ* units, while inter-brand differences ranged from 2.29-6.29ΔΕ* units.
Conclusions:
- Significant color differences exist within and between denture teeth brands, varying with illumination and hydration.
- Executive brand demonstrated superior color stability across different conditions compared to other brands.
- Clinical recommendations advise against mixing denture teeth from different brands; if necessary, select brands with proven stability under various illuminations.
