Color stability of temporary restorative materials

Area of Science:

• Dental Materials Science
• Polymer Chemistry
• Colorimetry

Background:

• Color stability is crucial for aesthetic dental restorations.
• Methacrylate-based resins are widely used in dentistry.
• Understanding material-specific staining is essential for long-term clinical success.

Purpose of the Study:

• To evaluate the color stability of different dental materials.
• To compare the degree of darkening among various resin formulations.
• To assess the influence of surface texture and curing methods on color change.

Main Methods:

• Spectrophotometric analysis of material color over 60 days.
• Comparison of initial color differences across shade 65 materials.
• Assessment of staining in air-cured versus pressure-cured samples.
• Evaluation of surface roughness effects on color change.

Main Results:

• Significant initial color differences were noted in shade 65 materials.
• Rough materials showed significantly more darkening than polished materials.
• No significant difference in staining between air-cured and pressure-cured samples.
• Epimine materials demonstrated the least color stability, with significant darkening.
• Methyl methacrylates showed the least darkening, followed by ethyl-methyl methacrylate.

Conclusions:

• Material composition significantly impacts color stability.
• Surface texture influences the degree of material darkening.
• Epimine resins are less color stable than methacrylate-based resins for dental applications.