PURPOSE This study aimed to evaluate the effect of incorporating zirconium oxide nanoparticles (nano-ZrO 2 ) in polymethylmethacrylate (PMMA) denture base resin on flexural properties at different material thicknesses. MATERIALS AND METHODS Heat polymerized acrylic resin specimens (N = 120) were fabricated and divided into 4 groups according to denture base thickness (2.5 mm, 2.0 mm, 1.5 mm, 1.0 mm). Each group was subdivided into 3 subgroups (n = 10) according to nano-ZrO 2 concentration (0%, 2.5%, and 5%). Flexural strength and elastic modulus were evaluated using a three-point bending test. One-way ANOVA, Tukey's post hoc, and two-way ANOVA were used for data analysis (α = .05). Scanning electron microscopy (SEM) was used for fracture surface analysis and nanoparticles distributions. RESULTS Groups with 0% nano-ZrO 2 showed no significant difference in the flexural strength as thickness decreased ( P = .153). The addition of nano-zirconia significantly increased the flexural strength ( P < .001). The highest value was with 5% nano-ZrO 2 and 2 mm-thickness (125.4 ± 18.3 MPa), followed by 5% nano-ZrO 2 and 1.5 mm-thickness (110.3 ± 8.5 MPa). Moreover, the effect of various concentration levels on elastic modulus was statistically significant for 2 mm thickness ( P = .001), but the combined effect of thickness and concentration on elastic modulus was insignificant ( P = .10). CONCLUSION Reinforcement of denture base material with nano-ZrO 2 significantly increased flexural strength and modulus of elasticity. Reducing material thickness did not decrease flexural strength when nano-ZrO 2 was incorporated. In clinical practice, when low thickness of denture base material is indicated, PMMA/nano-ZrO 2 could be used with minimum acceptable thickness of 1.5 mm.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.