A novel tribological study on DLC-coated micro-dimpled orthopedics implant interface
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
25704181
DOI
10.1016/j.jmbbm.2014.11.028
PII: S1751-6161(15)00033-8
Knihovny.cz E-zdroje
- Klíčová slova
- Diamond like carbon, Friction coefficient, Hip joint prosthesis, Micro dimple, Wear debris,
- MeSH
- diamant * MeSH
- kyčelní kloub MeSH
- mechanické jevy * MeSH
- ortopedie * MeSH
- povrchové vlastnosti MeSH
- protézy a implantáty * MeSH
- testování materiálů * MeSH
- tření MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- diamant * MeSH
This study investigates a tribological performance of diamond like carbon (DLC) coated micro dimpled prosthesis heads against ceramic cups in a novel pendulum hip joint simulator. The simulator enables determining friction coefficient and viscous effects of a concave shaped specimen interface (conformal contact). Two types of DLC such as hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (Ta-C) and one set of micro dimple (diameter of 300µm, depth of 70µm, and pitch of 900µm) were fabricated on metallic prosthesis heads. The experiment results reveal a significant friction coefficient reduction to the 'dimpled a-C:H/ceramic' prosthesis compared to a 'Metal (CoCr)/ceramic' prosthesis because of their improved material and surface properties and viscous effect. The post-experiment surface analysis displays that the dimpled a-C:H yielded a minor change in the surface roughness, and generated a larger sizes of wear debris (40-200nm sized, equivalent diameter), a size which could be certainly stored in the dimple, thus likely to reducing their possible third body abrasive wear rate. Thus, dimpled a:C-H can be used as a 'metal on ceramic hip joint interface', whereas the simulator can be utilized as an advanced bio-tribometer.
Citace poskytuje Crossref.org
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