Effect of treated zirconium dioxide nanoparticles on the flexural properties of autopolymerized resin for interim fixed restorations: An in vitro study

Autor:	Mohammed M. Gad, Fawaz Alzoubi, Burak Yilmaz, Sultan Akhtar, Ahmad M. Al-Thobity, Faris A. Alshahrani, Afnan Kashkari
Rok vydání:	2021
Předmět:	Materials science Zirconium dioxide Nanoparticle medicine.disease_cause chemistry.chemical_compound chemistry Flexural strength Distilled water visual_art Mold visual_art.visual_art_medium medicine In vitro study Oral Surgery Composite material 610 Medicine & health Acrylic resin Elastic modulus
Zdroj:	The Journal of Prosthetic Dentistry.
ISSN:	0022-3913
DOI:	10.1016/j.prosdent.2021.09.031
Popis:	STATEMENT OF PROBLEM Fractures of interim fixed restorations are a common complication. The autopolymerized polymethyl methacrylate resin materials used for interim fixed restorations have limited mechanical properties, but whether adding treated zirconium dioxide nanoparticles improves mechanical properties is unclear. PURPOSE The purpose of this in��vitro study was to evaluate the effect of treated zirconium dioxide nanoparticles on the flexural strength and elastic modulus of autopolymerized polymethyl methacrylate resin. MATERIAL AND METHODS A split-metal mold (60��10��3.3 mm) was used to fabricate 40 autopolymerized acrylic resin specimens. The specimens were divided into 4 groups (n=10) according to zirconium dioxide nanoparticle concentration: control (unmodified resin) and zirconium dioxide nanoparticle contents of 1, 2.5, and 5 wt%. The specimens were mixed and polymerized according to the manufacturer's instructions and stored in distilled water for 48 ��2 hours at 37 ��C. The flexural strength and elastic modulus were evaluated based on the 3-point bend test where data were analyzed by using 1-way analysis of variance and Tukey post hoc tests (��=.05). RESULTS The flexural strength of the 1-wt% zirconium dioxide nanoparticle specimens was significantly higher than that of the control group (P.05). Elastic modulus significantly decreased with 2.5-wt% zirconium dioxide nanoparticles (P=.019), while no significant changes were found with other test groups (P>.05). CONCLUSIONS The addition of treated zirconium dioxide nanoparticles at low concentrations increased the flexural strength of autopolymerized polymethyl methacrylate resins used in fixed interim restorations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0301b6a8875ede57d7b5933b2ba6414a https://doi.org/10.1016/j.prosdent.2021.09.031 Zobrazit plný text záznamu Full Text from ScienceDirect