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Tytuł:
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Effect of thermocycling on the surface properties of CAD-CAM denture base materials after different surface treatments.
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Autorzy:
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Atalay S; Department of Prosthodontics, Faculty of Dentistry, Istanbul Okan University, Istanbul, Turkey.
Çakmak G; Buser Foundation Scholar, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
Fonseca M; Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland. Electronic address: .
Schimmel M; Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
Yilmaz B; Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Division of Restorative and Prosthetic Dentistry, The Ohio State University, Ohio, USA.
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Źródło:
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Journal of the mechanical behavior of biomedical materials [J Mech Behav Biomed Mater] 2021 Sep; Vol. 121, pp. 104646. Date of Electronic Publication: 2021 Jun 16.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Amsterdam : Elsevier
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MeSH Terms:
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Denture Bases*
Polymethyl Methacrylate*
Computer-Aided Design ; Dental Materials ; Materials Testing ; Surface Properties
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Contributed Indexing:
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Keywords: CAD-CAM materials; Microhardness; PMMA dentures; Surface roughness; Thermocycling; Water contact angle
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Substance Nomenclature:
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0 (Dental Materials)
9011-14-7 (Polymethyl Methacrylate)
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Entry Date(s):
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Date Created: 20210624 Date Completed: 20210722 Latest Revision: 20210722
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Update Code:
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20240105
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DOI:
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10.1016/j.jmbbm.2021.104646
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PMID:
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34166873
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Purpose: To evaluate the effect of thermocycling on the water contact angle (WCA), surface roughness (SR), and microhardness (MH) of different CAD-CAM PMMA denture base materials after different surface treatments (conventional laboratory polishing, polishing kit, or surface sealant).
Materials and Methods: Disk-shaped specimens (10 × 2 mm) of 3 different CAD-CAM PMMAs, AvaDent (AV); Merz M-PM (M-PM); Polident (Poli), and a conventional heat-polymerized PMMA (Vynacron) (CV) (n=21) were divided into 3 different surface treatment groups (n=7): conventional laboratory polishing (CLP), polishing with acrylic resin polisher kit (PK), and a surface sealant (Palaseal) (SSC). Stereomicroscopic images were taken both before and after thermocycling. WCA, SR, and MH of all specimens were measured before and after thermocycling and compared by using a 2-way ANOVA (α=0.05).
Results: After thermocycling, WCA significantly increased for CLP- or PK -applied (P<.001) specimens of all materials and SSC-applied M-PM (P=.002), SR significantly increased for CLP-applied M-PM (P=.027) and PK-applied Poli (P=.041), and MH significantly decreased for CLP- or PK-applied AV (P = .001, P < .001, respectively), CV (P=.033, P=.023, respectively), and M-PM (P=.003, P=.001, respectively), SSC-applied M-PM (P<.001), and CLP-applied Poli (P<.001). Stereomicroscopic images revealed rougher surfaces for PK-applied specimens.
Conclusions: After thermocycling, surface treatment had a significant effect on water contact angle and surface roughness. CLP or PK application resulted in hydrophobic surfaces compared with before thermocycling. CLP or SSC application on CAD-CAM PMMAs resulted in smoother surfaces. Thermocycling lowered the microhardness of all PMMAs, and the decrease was significant in CLP- or PK-applied PMMAs, except for PK-applied Poli.
(Copyright © 2021 The Authors. Published by Elsevier Ltd.. All rights reserved.)
