Force-controlled dynamic wear testing of total ankle replacements
Currently, our knowledge of wear performance in total ankle replacements is limited. The aim of this study is to develop a scenario for force-controlled testing and wear testing of total ankle replacements. A force-controlled wear test was developed: based on cadaver measurements, the passive stabil...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
15 January 2015
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| In: |
Acta biomaterialia
Year: 2015, Volume: 12, Pages: 332-340 |
| ISSN: | 1878-7568 |
| DOI: | 10.1016/j.actbio.2014.10.036 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1016/j.actbio.2014.10.036 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S1742706114004875 
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| Author Notes: | Jörn Reinders, Falko von Stillfried, Emel Altan, Robert Sonntag, Daniel W.W. Heitzmann, Jan Philippe Kretzer |
| Summary: | Currently, our knowledge of wear performance in total ankle replacements is limited. The aim of this study is to develop a scenario for force-controlled testing and wear testing of total ankle replacements. A force-controlled wear test was developed: based on cadaver measurements, the passive stabilization (ligaments and soft tissue) of the ankle joint was characterized and a restraint model for ankle stabilization was developed. Kinematics and kinetics acting at the replaced ankle joint were defined based on literature data and gait analysis. Afterwards, force-controlled wear testing was carried out on a mobile, three-component, total ankle replacement design. Wear was assessed gravimetrically and wear particles were analyzed. Wear testing resulted in a mean wear rate of 18.2 ± 1.4 mm3/106 cycles. Wear particles showed a mean size of 0.23 μm with an aspect ratio of 1.61 ± 0.96 and a roundness of 0.62 ± 0.14. Wear testing of total ankle replacement shows that a relevant wear mass is generated with wear particles in a biologically relevant size range. The developed wear test provides a basis for future wear testing of total ankle replacements. |
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| Item Description: | Gesehen am 23.02.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1878-7568 |
| DOI: | 10.1016/j.actbio.2014.10.036 |