Tribology and Materials | Volume 1 | Issue 2 | 2022 | 55-60
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https://doi.org/10.46793/tribomat.2022.010
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Surface roughness evaluation of different novel CAD/CAM dental materials
Stefan Vulović
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Ivica Stančić, Aleksandra Popovac,
Aleksandra Milić-Lemić
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Ivica Stančić, Aleksandra Popovac,
Aleksandra Milić-Lemić
University of Belgrade, School of
Dental Medicine, Belgrade, Serbia
Abstract: The aim of the study was to evaluate and compare
surface roughness among different CAD/CAM dental materials when all
materials are finished and polished according to the manufacturer's
instructions. The 45 specimens were split into three groups: RBC
(resin-based composite), ZR (zirconia) and CoCr4 (CoCr4 alloy). The
surface roughness was evaluated using a mechanical profilometer, atomic
force microscopy (AFM) and scanning electron microscopy (SEM) analyses.
The data were analysed using the Kruskal-Wallis test with a Dunn's post
hoc analysis and all data were presented as mean ± SD. Surface roughness
analysis on a microscale (μm) revealed significantly higher Ra (μm) mean
values in the ZR group compared to RBC and (p < 0.05) and CoCr4 group (p
< 0.05), between which no statistically significant difference was
observed (p > 0.05). Surface roughness analysis on a nanoscale (nm) has
shown the opposite results, with the lowest values in the ZR group and
statistically significant differences among all material groups (p <
0.05). AFM 3D and SEM 2D images revealed heterogeneous surface
morphology for all groups.
Keywords: surface roughness, profilometer, SEM, AFM,
composite, zirconia, CoCr.
Received: 07-06-2022, Revised: 24-06-2022, Accepted: 24-06-2022
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license, which allows users to distribute, remix, adapt,
and build upon the material in any medium or format for non-commercial purposes only, and only so long as attribution is given to the creator.
Abstract: The aim of the study was to evaluate and compare surface roughness among different CAD/CAM dental materials when all materials are finished and polished according to the manufacturer's instructions. The 45 specimens were split into three groups: RBC (resin-based composite), ZR (zirconia) and CoCr4 (CoCr4 alloy). The surface roughness was evaluated using a mechanical profilometer, atomic force microscopy (AFM) and scanning electron microscopy (SEM) analyses. The data were analysed using the Kruskal-Wallis test with a Dunn's post hoc analysis and all data were presented as mean ± SD. Surface roughness analysis on a microscale (μm) revealed significantly higher Ra (μm) mean values in the ZR group compared to RBC and (p < 0.05) and CoCr4 group (p < 0.05), between which no statistically significant difference was observed (p > 0.05). Surface roughness analysis on a nanoscale (nm) has shown the opposite results, with the lowest values in the ZR group and statistically significant differences among all material groups (p < 0.05). AFM 3D and SEM 2D images revealed heterogeneous surface morphology for all groups.
Keywords: surface roughness, profilometer, SEM, AFM, composite, zirconia, CoCr.
Received: 07-06-2022, Revised: 24-06-2022, Accepted: 24-06-2022
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license, which allows users to distribute, remix, adapt, and build upon the material in any medium or format for non-commercial purposes only, and only so long as attribution is given to the creator.