Çakmak, Gülce; Subaşı, Meryem Gülce; Yilmaz, Burak (2021). Effect of thermocycling on the surface properties of resin-matrix CAD-CAM ceramics after different surface treatments. Journal of the mechanical behavior of biomedical materials, 117, p. 104401. Elsevier 10.1016/j.jmbbm.2021.104401
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PURPOSE
To evaluate the effect of thermocycling on the water contact angle (WCA), surface roughness (SR), and microhardness (MH) of resin-matrix computer-assisted design and computer-assisted manufacturing (CAD-CAM) ceramics after different surface treatments (conventional polishing or 2 different surface sealants).
MATERIAL AND METHODS
Two different types of resin-matrix CAD-CAM ceramics; a nanoparticle-filled resin (CeraSmart; CS) and a resin nanoceramic (Lava Ultimate; LU) were tested. Rectangular-shaped plates (1 mm-thick) were divided into 3 groups (n = 8) in terms of surface treatment methods applied: conventional polishing (control) or 2 surface sealants (Optiglaze (OG) and Palaseal (PS)). Scanning electron microscope images ( × 1000 and × 700 magnifications) of each material were taken from 2 additional specimens before surface treatments. After surface treatments, WCAs of deionized water, SR, and MH values of specimens were measured. All specimens were subjected to 5000 thermocycling and measurements were repeated. SR, WCA, and MH data before and after thermocycling were compared by using a 2-way ANOVA (α=.05).
RESULTS
A significant interaction was found between the surface treatment and the material for WCA after thermocycling (P < .001), for SR before thermocycling (P = .014), and for MH both before and after thermocycling (P < .001). SEM images before surface treatments revealed that the surface of CS was mechanically rougher with a more microretentive topography compared with the surface of LU. No significant correlation was found between SR and WCA (P > 0.05).
CONCLUSIONS
Thermocycling affected the SR, MH, and WCA of all resin-matrix CAD-CAM ceramics.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
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: |
Yilmaz, Burak |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1751-6161 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Tina Lauper |
Date Deposited: |
04 May 2021 10:41 |
Last Modified: |
05 Dec 2022 15:48 |
Publisher DOI: |
10.1016/j.jmbbm.2021.104401 |
PubMed ID: |
33652235 |
Uncontrolled Keywords: |
CAD-CAM ceramics Microhardness Resin-matrix Surface roughness Water contact angle |
BORIS DOI: |
10.7892/boris.153470 |
URI: |
https://boris.unibe.ch/id/eprint/153470 |
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