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In vitro weathering of selected direct esthetic restorative materials
T J Fruits1, M G Duncanson, F J Miranda
1Department of Operative Dentistry, University of Oklahoma, College of Dentistry, Oklahoma City 73190, USA.
Quintessence International (Berlin, Germany : 1985)
|June 1, 1997
Summary
Glass-ionomer cement and resin composites were tested for color stability under simulated environmental conditions. Glass-ionomer showed significantly more color shift than resin composites, indicating poorer color stability for this dental restorative material.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Color Science
Background:
- Dental restorative materials are crucial for oral health.
- Assessing the long-term color stability of these materials is essential for aesthetic outcomes.
- Visible light-cured resin composites and glass-ionomer cements are commonly used dental restoratives.
Purpose of the Study:
- To compare the surface color shift of hybrid resin composites, small-particle resin composites, and glass-ionomer cement after simulated weathering.
- To evaluate the impact of heat, UV light, and moisture on the color stability of these dental materials.
Main Methods:
- Reflectance spectroscopy was employed to measure color changes.
- The CIELAB system's delta E*ab (overall color difference), delta C*ab (chroma change), and delta H*ab (hue difference) parameters were utilized.
- Materials were subjected to weathering for 0, 100, 200, 300, and 400 hours.
Main Results:
- All tested restorative materials exhibited color shifts, chroma changes, and hue differences.
- Glass-ionomer cement displayed a significantly greater degree of color shift compared to both resin composite types.
- No significant difference in overall color change was found between hybrid and small-particle resin composites, though lightness changes differed significantly.
Conclusions:
- Glass-ionomer cement is less color-stable than visible light-cured resin composites under simulated environmental conditions.
- Resin composites demonstrate superior color stability, making them a more predictable choice for aesthetic dental restorations.
- Further research may explore long-term clinical performance and patient-reported aesthetic satisfaction.