Wear behavior of bonded occlusal veneers constructed from machine milled glass and polymer infiltrated ceramics in contact with enamel: An in vitro study

Abstract

Statement of problem: Occlusal veneer is considered an extra-coronal restoration with less invasive preparation. Yet there is a shortage of information as regards the wear behavior of materials from which occlusal veneers are manufactured and their opposing enamel. Purpose: Evaluate the wear of bonded occlusal veneers constructed from two dissimilar materials along with their opposing enamel following chewing simulation. Material and Methods: 16 table tops of two dissimilar materials "lithium disilicate and polymer infiltrated ceramics" were manufactured with a complete digital workflow. The occlusal veneers were bonded in accordance with the manufacturer's directions to their corresponding epoxy resin dies. 2-body wear test with 49 N of mastication force and 37,500 cycles was done and wear behavior was determined by substance loss and roughness changes. Results: The weight loss of Rosetta SM occlusal veneers was higher than Vita Enamic occlusal veneers p value