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Colour stability of temporary restorations with different thicknesses submitted to artificial accelerated aging
F D J Silame, R Tonani, C C Alandia-Roman
1University of São Paulo, Ribeirão Preto Dental School, Department of Dental Materials and Prosthodontics, SP, Brazil.
The European Journal of Prosthodontics and Restorative Dentistry
|February 1, 2014
Summary
Temporary dental restorations made from acrylic resin (Duralay) and bis-methyl acrylate (Luxatemp) showed significant color changes after accelerated aging. Luxatemp exhibited better color stability than Duralay, especially at 0.5 mm thickness.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Biomaterials
Background:
- Color stability is crucial for the aesthetics and longevity of temporary prosthetic restorations.
- Previous research indicates variations in the color stability of different dental materials under aging conditions.
Purpose of the Study:
- To evaluate the color stability of temporary prosthetic restorations made from two different materials (Duralay and Luxatemp) at two thicknesses (0.5 mm and 1.0 mm) subjected to artificial accelerated aging.
Main Methods:
- Two types of acrylic resin specimens, Polymethyl methacrylate (Duralay) and Bis-methyl acrylate (Luxatemp), were fabricated in 0.5 mm and 1.0 mm thicknesses.
- Specimens were artificially aged, and their color parameters (CIE L*a*b*) were measured before and after aging.
- Color changes were assessed on ground molar enamel surfaces.
Main Results:
- All tested temporary restoration materials exhibited color alterations exceeding the clinically acceptable limit after accelerated aging.
- Bis-methyl acrylate (Luxatemp) demonstrated the lowest degree of color alteration across both thicknesses.
- Polymethyl methacrylate (Duralay) showed the most significant color alteration, particularly at the 0.5 mm thickness.
Conclusions:
- Both tested materials for temporary restorations undergo unacceptable color changes under accelerated aging conditions.
- Bis-methyl acrylate (Luxatemp) offers superior color stability compared to Polymethyl methacrylate (Duralay) for temporary prosthetic applications.
- Material thickness plays a role, with thinner specimens potentially showing greater color instability, though Luxatemp maintained better stability regardless of thickness.
