Effect of different disinfection protocols on the surface properties of CAD-CAM denture base materials.

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)

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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