In Vitro Wear Resistance of Pediatric Dental Restorative Materials in Simulated Oral Environments.

Objective: This study aimed to evaluate the wear resistance of various pediatric dental restorative materials. Materials and Methods: Cylindrical samples were prepared using six restorative materials: Glass ionomer cement (GIC), resin-modified GIC, nano-ionomer, giomer, ormocer, and nanocomposite. The samples were mechanically and thermally stressed using a chewing simulator with a maximum number of 100,000 load cycles. The abrasion volume and surface roughness after the termination of the chewing simulation were calculated using a profilometer. Results: Significant differences were observed in the initial and final roughness (P < 0.001), with nanocomposites showing the lowest roughness. GIC had the highest volume loss and the most prominent change in surface roughness. Conclusion: Nanocomposites show an improved wear resistance compared to others, indicating the high potential of this material for long-lasting restorations.