Analysis of enamel and material wear by digital microscope: an in-vitro study

Abstract

The objective of the study was to analyze the surface area (SA) of the wear caused by simulated chewing on human enamel and opposing restorative material, namely: composite resin (CR), porcelain fused to metal (PFM), lithium disilicate (LD), or monolithic zirconia (MZr). Forty-eight premolars were selected as enamel specimens and divided randomly into 4 groups (n = 48; n =12) used as antagonists in chewing simulation (250,000 loading cycles) against one of the four selected test materials. Enamel and material specimens were scanned and evaluated under digital microscope, and wear SA (mm 2) were recorded. Descriptive statistics, paired t-test, one-way ANOVA, and post-hoc Tukey-HSD tests were used for statistics (p < 0.05). The smallest and largest SA were exhibited by enamel against LD (0.80 mm 2) and PFM (1.74 mm 2), respectively. PFM (3.48 mm 2) showed the largest SA and CR (2.28 mm 2) showed the smallest SA. Paired t-test for SA values showed significant difference (p < 0.05) in all wear comparisons between materials and enamel antagonists. The wear of materials were greater than that of their respective enamel antagonists (p < 0.05). One-way ANOVA of the logarithmic means of wear SA revealed significant differences (P<0.05). Post-hoc Tukey test revealed significance for PFM (p < 0.05) with other materials. Wear of all test materials was greater compared to the wear of enamel antagonists. PFM and LD caused the largest and the smallest enamel wear, respectively. CR, LD, and MZr are more resistant than PFM to wear after simulated chewing against enamel.

Polyetherketoneketone (PEKK): An emerging biomaterial for oral implants and dental prostheses

“…Ideally, the tooth/enamel wear due to dental restorations should not be more than the physiological wear of the teeth. The selection of appropriate restorative materials, aimed at having an almost similar degree of hardness to that of enamel is important for minimizing/retarding the harmful and irreversible consequences of tooth/enamel wear [56] , [57] . Choi et al [58] evaluated the effects of polymeric restoration on opposing tooth wear where they examined five materials fabricated from CAD/CAM: Pekkton (PEKK), Yamahachi PMMA (YAP), Mazic Duro (MZD), Vipi Block Monocolor (VBM), and Vita Enamic (ENA).…”

Enamel wear against monolithic zirconia restorations: A meta‐analysis and systematic review of in vitro studies

“…In some studies, samples were subjected to thermocycling. 30,34,35,41,44,[78][79][80] Thermocycling simulates the permanent humidity and the temperature changes in the oral cavity. It removes abraded particles away from the specimen surfaces.…”

“…Gundugollu et al 40 Polished by: Iris Ceramic finishing diamond points followed by Shofu polishing discs Glazed by: glaze applied and fired in VITA VACUMAT porcelain furnace Habib et al 79 -Jung et al 41 Polished by: a sheet of 1200-grit abrasive paper Glazed by: glazing of Zirkonzahn prettau Habib et al 80 Polished by: Zolid allbright diamond paste F I G U R E 4 Meta-analysis -Forest plot: a continuous measure of the subgroup analysis. The continuous measure is performed for the comparison of means between the two studies.…”

In vitro attrition wear resistance of four types of paste-like bulk-fill composite resins

“…The specimens were then subjected to 250,000 cycles (corresponding to one year of mastication in a normal individual) of attrition wear in a chewing simulator (C-S-4, SD-Mechatronik Company, Germany) [ 21 ]. For this purpose, the composite specimens were placed in Teflon molds corresponding to the size of the specimens (such that the specimens did not move during load application).…”