Localized wear of compomer restorative materials

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Compomers are widely used in restorative dentistry due to their handling properties and fluoride release.
• Understanding the wear resistance of different compomer formulations is crucial for predicting their clinical longevity.
• Localized wear can significantly impact the functional and aesthetic outcomes of dental restorations.

Purpose of the Study:

• To quantitatively assess and compare the localized wear of six commercially available compomer restorative materials.
• To identify compomers with superior wear resistance for potential clinical applications.

Main Methods:

• Specimens of six compomers (Dyract, Dyract AP, F2000, Compoglass F, Elan, Hytac) were prepared and subjected to simulated localized wear using a Leinfelder wear machine.
• Surface profilometry was employed to measure volume loss and wear facet depth before and after wear simulation.
• Statistical analysis, including ANOVA and Tukey's test, was performed to determine significant differences in wear between materials.

Main Results:

• Significant differences in both volume loss and maximum wear depth were observed among the tested compomers.
• F2000, Hytac, and Elan demonstrated significantly lower volume loss and wear depth compared to Compoglass F, Dyract AP, and Dyract.
• No significant difference in volumetric loss was found between F2000 and Hytac, or between Hytac and Elan.

Conclusions:

• The in vitro wear rates of compomer materials vary significantly.
• Compomers F2000, Hytac, and Elan exhibit superior localized wear resistance compared to Compoglass F, Dyract AP, and Dyract.
• These findings have implications for material selection in clinical restorative dentistry to enhance restoration durability.