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Color stability of denture base polymers
1Department of Prosthodontics, Faculty of Dentistry, Ege University, Izmir, Turkey.
The International Journal of Prosthodontics
|July 1, 1994
Summary
Denture base polymers showed superficial staining from coffee and tea, but brushing effectively removed it. Most materials maintained color stability in warm water, though artificial sunlight caused varied reactions.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials
Background:
- Denture base polymers are susceptible to discoloration from common beverages and environmental factors.
- Assessing the color stability of different polymerization methods is crucial for clinical longevity.
Purpose of the Study:
- To evaluate the color stability of light-polymerized, heat-polymerized, and autopolymerized denture base polymers.
- To compare the effects of coffee, tea, warm water, and artificial sunlight on denture base materials.
Main Methods:
- Seven denture base polymers (1 light-polymerized, 3 heat-polymerized, 3 autopolymerized) were tested.
- Materials were exposed to coffee, tea, water (50°C), and artificial sunlight with water.
- Color stability was measured using a spectrophotometer; water sorption, solubility, and chemical characterization were also performed.
Main Results:
- Coffee and tea caused superficial staining, which was reduced by brushing and grinding.
- All tested polymers exhibited good color stability when immersed in warm water.
- Significant differences in color stability were observed among materials exposed to artificial sunlight and water.
Conclusions:
- Denture base polymers can be stained by coffee and tea, but discoloration is manageable with routine cleaning.
- Warm water immersion does not significantly affect the color stability of these polymers.
- Artificial sunlight poses a variable risk to the color stability of denture base materials, necessitating further investigation.