Rosentritt, Martin and Schneider-Feyrer, Sibylle and Kurzendorfer, Laura (2024) Comparison of surface roughness parameters Ra/Sa and Rz/Sz with different measuring devices. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, 150: 106349. ISSN 1751-6161, 1878-0180
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Objectives: The aim of this in-vitro study was to investigate the influence of the measuring devices (mechanical and optical) on the surface values Ra/Sa and Rz/Sz of different materials and machined surfaces. Material and methods: Mechanical (contact profilometry (CP): Perthometer S6P, Perthen Mahr, G) and optical (scanning electron microscope (SEM): Phenom, FEI, NL; confocal 3D laser scanning microscope (CLSM): VK-100, Keyence, J) measuring devices were used to determine the surface roughness Ra/Sa and Rz/Sz. Glass-ceramic (Empress, Ivoclar-Vivadent, FL), zirconia (Cercon HT, Dentsply, D), composite (Grandio, Voco, D), denture base material (Palapress, Kulzer, D) and titanium (grade 4) were investigated (n = 10 measurements) after surface finishing: sandblasting (Al2O3; 250 mu m), diamond treatment (80 mu m; wet), sandblasting (Al2O3; 50 mu m), and polishing (grit of 4000; wet; Tegramin-25, Struers, D). Statistics: Shapiro-Wilk, ANOVA, Bonferroni post-hoc tests (alpha = 0.05). Results: Surface characteristics Ra/Sa and Rz/Sz, which were detected with mechanical and optical measuring devices on different materials and surface finishing, showed significant (p <= 0.001, ANOVA) differences. Significant (p <= 0.045, Bonferroni) differences between CP, SEM and CLSM (line; area) were found, mainly for Ra/ Sa. Discussion: The surface roughness on different dental materials and differently machined surfaces were influenced by the individual mechanical and optical measuring devices. Optical methods measure a significantly higher roughness value for all materials and surface finishes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | STYLUS; Surface roughness; Contact profilometry; Scanning electron microscope; Confocal 3D laser scanning microscope; CP; SEM; CLSM; Ra/Sa; Rz/Sz |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Jul 2025 12:57 |
| Last Modified: | 24 Jul 2025 12:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/63708 |
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