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In vitro abrasion of two acrylic veneers
1Department of Prosthetic Dentistry and Stomatognathic Physiology, University of Oslo, Norway.
Summary
Dental acrylic abrasion resistance varies significantly by brand, with fluoride in toothpaste showing no impact. Dentacolor acrylic demonstrated superior abrasion resistance compared to Biodent and even dental enamel.
Area of Science:
- Dental Materials Science
- Biomaterials Wear Resistance
Background:
- Acrylic resins are commonly used as veneering materials in dental prosthetics.
- Understanding their wear characteristics is crucial for long-term restoration success.
Purpose of the Study:
- To compare the in vitro abrasion resistance of two acrylic veneer materials against dental enamel.
- To evaluate the influence of fluoride-containing dentifrice on acrylic and enamel abrasion.
Main Methods:
- Ten specimens each of two acrylics (Dentacolor, Biodent) and human enamel were prepared and polished.
- Specimens underwent 10,000 brushing cycles using a standardized dentifrice with and without fluoride.
- Abrasion was assessed visually, photographically, and quantitatively using profilometry.
Main Results:
- Dentacolor exhibited significantly higher abrasion resistance than Biodent, independent of fluoride.
- Dentacolor showed greater abrasion resistance than enamel, while Biodent did not.
- No significant difference in enamel abrasion was observed between fluoride and non-fluoride dentifrice groups.
Conclusions:
- Significant variations exist in the abrasion resistance of different acrylic veneering materials.
- Fluoride content in toothpaste did not demonstrably affect the abrasion of the tested acrylics or enamel.
- Brand selection is a critical factor in the wear performance of acrylic dental veneers.