TRIBOLOGICAL PERFORMANCE OF COMPOSITE RESIN TREATED BY CONTINUOUS AND PULSED LIGHT CURING

Document Type : Original Article

Authors

1 Mechanical Engineering Dept., Faculty of Engineering, Suez Canal University, EGYPT

2 Galaa Teaching Hospital, EGYPT

3 Endodontic department, Faculty of Dentistry, Sinai University, EGYPT

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

5 Mechanical Engineering Dept., Faculty of Engineering, Assiut University, EGYPT.

Abstract

The present work investigates the effect of continuous and pulsed light curing methods on the tribological properties of composite resin dental restorations. The objectives are to give specific information to the dentists to ensure durable restoration when applying light curing.
It was found that pulsed light cured specimens showed lower friction and wear than that detected for continuous light curing. Besides, friction coefficient displayed lower values in water wet sliding than that observed in dry sliding. Wet sliding showed higher wear than dry sliding, where pulsed light cured specimens showed lower wear than continuous light cured ones. In addition, pulsed light cured specimens generated lower voltage than the continuous light curing. Sliding of composite resin on bovine teeth revealed that continuous light cured specimens showed higher friction coefficient than pulsed treated ones. Light pulsed cured specimens generated higher voltage than that measured for continuously cured ones. It seems that pulsed curing allowed longer time during curing process that facilitates the free monomers to be linked to other ones, forms longer polymer chains and increases the degree of polymerization.

Keywords

Journal of the Egyptian Society of Tribology
Volume 22, Issue 4
October 2025
Pages 72-84

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