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Updated: May 26, 2026
03:37
Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
Published on: June 6, 2025
Color management of the cervical region using different framework materials
Haytham Abualsaud1, Roya Zandparsa, Hiroshi Hirayama
1College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Summary
Achieving accurate dental crown color matching at the cervical area is challenging. Current crown systems, including various alloys and zirconium oxide, failed to replicate the natural tooth
Area of Science:
- Dental materials science
- Prosthodontics
- Colorimetry
Background:
- Accurate color matching of dental prostheses to natural teeth, particularly in the cervical region, presents a significant clinical challenge.
- This difficulty impacts the aesthetic outcome of restorative dental treatments.
Purpose of the Study:
- To evaluate and compare the color accuracy of the cervical region of five distinct commercial crown systems against a natural extracted tooth.
- To assess the color differences between the tested crown systems themselves.
Main Methods:
- Colorimetric analysis (L*, a*, b* parameters) of an extracted maxillary incisor was performed using a ShadeVision colorimeter.
- Fifty master dies were fabricated into crowns using five different framework materials: high-noble gold alloy, gold paste-treated alloy, precious reinforced alloy, white zirconium oxide, and shaded zirconium oxide.
- Mean color differences (ΔE) were calculated and statistically analyzed using one-way ANOVA and post hoc tests (α=0.05).
Main Results:
- All tested crown systems exhibited clinically unacceptable color differences (ΔE > 3.7) when compared to the natural tooth.
- However, the color differences among the different porcelain systems themselves were not visually perceptible (ΔE < 3.7).
Conclusions:
- The study concludes that, within its limitations, none of the evaluated crown systems could successfully duplicate the cervical color of the natural extracted tooth.
- Color matching in the cervical region of dental crowns remains a complex and difficult task in clinical practice.
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