Evaluating Polishability of Zirconia Impregnated PMMA Nanocomposite for Denture Base Application
AuthorsZidan, Saleh; email: firstname.lastname@example.org
Silikas, Nikolaos; orcid: 0000-0003-4576-4584; email: email@example.com
Haider, Julfikar; orcid: 0000-0001-7010-8285; email: firstname.lastname@example.org
Jahantigh, Javad; email: email@example.com
Alhareb, Ahmed; email: firstname.lastname@example.org
Yates, Julian; email: email@example.com
MetadataShow full item record
AbstractArtificial biomaterials are being developed for use in denture base with symmetrical properties to restore the aesthetics and functionalities. The rough surface of denture base resin promotes the adhesion of microorganisms and plaque accumulation. This study aimed to explore the consequences of polishing times on the surface roughness of high-impact (HI) heat-polymerized PMMA denture base acrylic resin reinforced with zirconia nanoparticles (nanocomposite). Thirty specimens (25 ± 0.50 mm in diameter and 2 ± 0.10 mm thickness) were fabricated from HI PMMA by adding zirconia nanoparticles at different concentrations of (0 wt.%, 1.5 wt.%, 3 wt.%, 5 wt.%, 7 wt.%, and 10 wt.%). Specimens were divided into six groups (n = 5) and surface roughness (Ra) was measured before and after polishing with a standard protocol for one and two minutes. The addition of zirconia in PMMA at low concentrations (1.5 wt.%, 3 wt.%, and 5 wt.%) did not negatively affect the surface finish of the denture base composites following conventional polishing and remained below the clinically acceptable limit (0.2 µm). After one minute of polishing, only the 10 wt.% zirconia (0.17 ± 0.03 µm) demonstrated a substantial rise in median surface roughness, in comparison with the control group (0.11 ± 0.01 µm). It is concluded that the group containing 3 wt.% (0.10 ± 0.01 µm) of zirconia is the optimum concentration to obtain the best symmetrical surface finish after two minutes of polishing.
CitationSymmetry, volume 13, issue 6, page e976
DescriptionFrom MDPI via Jisc Publications Router
History: accepted 2021-05-21, pub-electronic 2021-05-31
Publication status: Published
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