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Color changes in staining solutions of four light-cured indirect resin composites
Christina Kentrou1, Triantafillos Papadopoulos, Panagiotis Lagouvardos
1Department of Biomaterials, Dental School, University of Athens, Athens, Greece.
Odontology
|February 19, 2013
Summary
Indirect resin composite color changes significantly with staining solutions like coffee, tea, and chocolate. Even after one week, color shifts were clinically noticeable, becoming unacceptable by week two.
Area of Science:
- Dental Materials Science
- Color Science in Dentistry
- Polymer Chemistry
Background:
- Indirect resin composites are widely used in restorative dentistry.
- Maintaining the aesthetic properties, specifically color stability, of these materials is crucial for patient satisfaction.
- Dietary factors and beverages can impact the long-term color stability of dental restorations.
Purpose of the Study:
- To evaluate the impact of common staining solutions (tea, coffee, chocolate) on the color coordinates of four different indirect light-cured resin composites.
- To determine the influence of immersion time and material type on color changes.
- To assess color stability using the CIELAB system and quantify color differences (ΔE*).
Main Methods:
- 112 resin composite discs (four types) were immersed in tea, coffee, chocolate, and distilled water at 37°C for four weeks.
- Color measurements were taken weekly using the CIELAB system.
- Color change values (ΔL*, Δa*, Δb*, ΔE*) were calculated and analyzed using two-way repeated ANOVAs.
Main Results:
- Coffee demonstrated the most significant color alteration across all tested materials (p < 0.05).
- The Sinfony composite exhibited the greatest color change, primarily due to shifts in b* and L* coordinates.
- Color stability was significantly influenced by the type of staining solution, immersion duration, and the specific resin composite material used.
Conclusions:
- The color of indirect resin composites is susceptible to staining from common beverages.
- Clinically appreciable color changes (ΔE* > 2.7) were observed as early as the first week of immersion.
- Unacceptable color changes (ΔE* > 5.5) occurred by the second week, highlighting the need for material selection and patient counseling regarding diet.
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