Atalay, Sevda; Çakmak, Gülce; Fonseca, Manrique; Schimmel, Martin; Yilmaz, Burak (2023). Effect of different disinfection protocols on the surface properties of CAD-CAM denture base materials. The journal of prosthetic dentistry, 130(5), pp. 787-795. Elsevier 10.1016/j.prosdent.2021.12.007
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STATEMENT OF PROBLEM
Which disinfection protocol provides optimal water contact angle and microhardness for computer-aided design and computer-aided manufacturing (CAD-CAM) polymethyl methacrylate (PMMA) materials is unclear.
PURPOSE
The purpose of this in vitro study was to evaluate the effect of different disinfection protocols (1% sodium hypochlorite, denture cleanser gel, and effervescent tablet) on the water contact angle and microhardness of different CAD-CAM PMMA denture base materials by comparing them with a heat-polymerized PMMA.
MATERIAL AND METHODS
Disk-shaped specimens (Ø10×2 mm) were fabricated from 3 different CAD-CAM PMMAs-AvaDent (AV), Merz M-PM (M-PM), and Polident (Poli)-and a heat-polymerized PMMA (Vynacron) (CV) (n=21). Three disinfection protocols (1% sodium hypochlorite [HC], denture cleanser gel [GEL], an effervescent tablet [TAB]) were applied to simulate 180 days of cleansing. The water contact angle and microhardness of specimens were measured before and after disinfection and compared by using a 2-way ANOVA (α=.05).
RESULTS
For water contact angle, material (P=.010) and disinfection protocol (P=.002) had a significant effect. The material (P<.001), disinfection protocol (P=.001), and their interaction (P<.001) significantly affected the microhardness after disinfection. When the condition after disinfection was compared with that before disinfection, the water contact angle increased significantly in all material-disinfection protocol pairs (P≤.025), and microhardness increased significantly in all material-disinfection protocol pairs (P≤.040), except for GEL- (P=.689) or TAB-applied (P=.307) AV, HC-applied M-PM (P=.219), and TAB-applied Poli (P=.159).
CONCLUSIONS
The material and disinfection protocol affected the water contact angle of all tested PMMAs after disinfection, resulting in more hydrophobic surfaces for heat-polymerized or CAD-CAM PMMAs. The microhardness of heat-polymerized PMMA was less than that of all CAD-CAM PMMAs after disinfection, regardless of the protocol.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine 04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology 04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry |
UniBE Contributor: |
Cakmak, Gülce, Fonseca Escalante, Manrique, Schimmel, Martin, Yilmaz, Burak |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1097-6841 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
22 Feb 2022 06:48 |
Last Modified: |
14 Nov 2023 00:11 |
Publisher DOI: |
10.1016/j.prosdent.2021.12.007 |
PubMed ID: |
35148889 |
BORIS DOI: |
10.48350/165826 |
URI: |
https://boris.unibe.ch/id/eprint/165826 |
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