Effect of counterface roughness on abrasive wear of hydroxyapatite |
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| Affiliation: | 1. Center for Tribology and Technical Diagnostics, University of Ljubljana, Bogisiceva 8, 1000 Ljubljana, Slovenia;2. Ceramics Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-8520, USA;1. Department of Physics, University of Oxford, OX1 3RH, UK;2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China;3. Department of Astrophysics/IMAPP, Radboud University, Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands;4. Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands;5. Astrophysical Institute, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium;6. Kapteyn Astronomical Institute, University of Groningen, PO Box 800, NL-9700 AV Groningen, The Netherlands;7. ASTRON, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The Netherlands;1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China;2. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Chinese Academy of Sciences, Fuzhou 350002, China;3. Tianjin Key Laboratory of Thin Film and Optics, Tianjin Jinhang Institute of Technical Physics, Tianjin 300192, China;1. KU Leuven, Department of Civil Engineering, Kasteelpark Arenberg 40, B-3001 Leuven, Belgium;2. University of Cambridge, Engineering Department, Trumpington Street, Cambridge CB2 1PZ, United Kingdom;3. University of Qatar, Department of Civil and Architectural Engineering, P.O. Box 2713, Doha, Qatar;1. Department of Mechanical, Chemical and Materials Engineering, Università degli Studi di Cagliari, Cagliari, Italy;2. Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, Italy;1. KU Leuven, Department of Civil Engineering, Kasteelpark Arenberg 40, B-3001 Leuven, Belgium;2. University of Cambridge, Department of Engineering, Trumpington Street, Cambridge CB2 1PZ, United Kingdom |
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| Abstract: | The present study was undertaken to evaluate the effect of surface roughness of glass-infiltrated alumina on the abrasive wear of hydroxyapatite using a pin-on-disk tribometer. Hydroxyapatite was used as a model material to simulate tooth enamel. The wear tests were conducted in distilled water at room temperature using a constant sliding speed and three loads to model the normal occlusal contact conditions. The wear volume of polished hydroxyapatite pins increased by more than 20-fold as the average roughness of the alumina disks increased from 14 to 649 nm Ra. No measurable wear was detected on the alumina specimens. The wear surfaces were viewed in a scanning electron microscope (SEM) and were analyzed with X-ray dispersion spectroscopy to determine the extent of surface damage and the wear mechanisms. It is suggested that polished ceramic restorations will cause relatively low enamel wear, while increased roughness could severely abrade and damage the tooth enamel. |
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