ABRASIVE WEAR RESISTANCE OF COMPOSITE RESIN

Farrag, A. A.; Mousa, M. O; Khashaba, M.; Mohamed, M. K.; Samy, A. M.; Ali, W. Y.; Ameer, A. K.

doi:10.21608/jest.2025.456797

ABRASIVE WEAR RESISTANCE OF COMPOSITE RESIN

Document Type : Original Article

Authors

Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, El-Minia, EGYPT.

10.21608/jest.2025.456797

Abstract

Composite resins are extensively used in direct dental restorations. The performance of composite resins is influenced by the procedure of application and light curing mode. The application of the composite resin may be in bulk-fill and incremental layering that differ polymerization depth and mechanical properties. Besides, light curing methods such as continuous and pulsed ones affect the degree of polymerization and durability. The present study investigates the wear resistance and friction coefficient of resin composite restorations using bulk-fill and incremental layering by continuous and pulsed light curing modes under controlled laboratory conditions. Accelerated wear tests were carried using pin on disc test rig at different loads to simulate oral masticatory forces.
The results showed that utilizing the pulsed light curing mode displayed lower fiction and wear compared to continuous curing. Applying composite resin in two and three layers for continuous curing, showed relatively lower wear rather than bulk-fill. Besides, incremental layering enhances the degree of polymerization, while bulk-fill of pulsed curing showed the lowest wear. Finally, it is recommended to consider both the impact of curing mode and layering technique together, rather than relying on one factor alone, to get optimal long duration performance of composite restorations.

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