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Evaluating Polishability of Zirconia Impregnated PMMA Nanocomposite for Denture Base Application

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Department of Dental Materials, Faculty of Dentistry, Sebha University, Sebha 18758, Libya
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Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PL, UK
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Department of Engineering, Manchester Metropolitan University, Manchester M1 5GD, UK
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Department of Dental Material, Faculty of Medical Technology, Elmergib University, Elmergib 40414, Libya
*
Author to whom correspondence should be addressed.
Academic Editor: Raffaele Barretta
Symmetry 2021, 13(6), 976; https://doi.org/10.3390/sym13060976
Received: 23 April 2021 / Revised: 12 May 2021 / Accepted: 21 May 2021 / Published: 31 May 2021
(This article belongs to the Special Issue Application of Nanocomposite in Biomaterials)
Artificial 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. View Full-Text
Keywords: denture; PMMA; zirconia (ZrO2); nanocomposite; polishability; surface roughness denture; PMMA; zirconia (ZrO2); nanocomposite; polishability; surface roughness
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MDPI and ACS Style

Zidan, S.; Silikas, N.; Haider, J.; Jahantigh, J.; Alhareb, A.; Yates, J. Evaluating Polishability of Zirconia Impregnated PMMA Nanocomposite for Denture Base Application. Symmetry 2021, 13, 976. https://doi.org/10.3390/sym13060976

AMA Style

Zidan S, Silikas N, Haider J, Jahantigh J, Alhareb A, Yates J. Evaluating Polishability of Zirconia Impregnated PMMA Nanocomposite for Denture Base Application. Symmetry. 2021; 13(6):976. https://doi.org/10.3390/sym13060976

Chicago/Turabian Style

Zidan, Saleh, Nikolaos Silikas, Julfikar Haider, Javad Jahantigh, Ahmed Alhareb, and Julian Yates. 2021. "Evaluating Polishability of Zirconia Impregnated PMMA Nanocomposite for Denture Base Application" Symmetry 13, no. 6: 976. https://doi.org/10.3390/sym13060976

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