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Color stability of highly filled composite resin materials for facings
1Dental School, Department of Prosthodontics, Ruprecht-Karls-University, Heidelberg, Germany. thomas_stober@med.uni-heidelberg.de
Summary
Resin-based dental composites showed significant discoloration when exposed to red wine and turmeric solutions. Further improvements in color stability are needed for these high-inorganic filling materials used in dental facings.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
Background:
- Resin-based composites are widely used for dental facings due to their aesthetic properties.
- High-inorganic filling materials aim to enhance mechanical properties but may affect color stability.
Purpose of the Study:
- To evaluate the color stability of seven resin-based facing composites with high inorganic filler content.
- To assess discoloration after exposure to various common staining agents and UV irradiation.
Main Methods:
- Seven different resin-based facing composite materials were tested.
- Samples underwent UV irradiation and immersion in staining solutions (mouthrinse, tea, coffee, red wine, turmeric).
- Color changes were quantified using a colorimeter, measuring DeltaE values.
Main Results:
- Red wine and turmeric solution induced the most significant discoloration (DeltaE > 10).
- Tea, coffee, mouthrinse, and UV irradiation caused varying degrees of discoloration, some clinically unacceptable (DeltaE > 3.3).
Conclusions:
- Current resin-based facing composites with high inorganic filler content exhibit susceptibility to discoloration.
- Enhancing the color stability of these materials is crucial for long-term aesthetic outcomes in dental restorations.