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The Influence of Implant Positioning and Design on Biomechanical Properties of the Replaced Ankle
| Third-party funded project |
| Project title |
The Influence of Implant Positioning and Design on Biomechanical Properties of the Replaced Ankle |
| Principal Investigator(s) |
Hintermann, Beat
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| Organisation / Research unit |
Bereich Operative Fächer (Klinik) / Bewegungsapparat und Integument |
| Project start |
01.01.2010 |
| Probable end |
30.06.2011 |
| Status |
Completed |
| Abstract |
In recent decades, total ankle replacement (TAR) has become a valuable treatment option for end-stage ankle osteoarthritis. Although TAR continues to gain a greater clinical acceptance, postoperative complications such as prosthesis loosening and persistent pain remains much more prevalent than arthroplasties of other joints such as the hip or knee. One possible factor responsible for higher failure rates is the difficulty in obtaining the correct placement of the talar component such that the joint center of rotation is maintained. It is possible that differences in the pre- and postoperative joint center leads to abnormal articulation, increased joint contact and shear stresses, and the onset/advancement of osteoarthritis. Adding of a second interface between the polyethylene (PE) insert ant the tibial prosthesis component of the three-component TAR may permit the prosthesis components to adapt more physiological articulation. This may prevent deleterious loading of ankle soft tissues and reduce PE wear. Therefore, it is generally believed that a three-component TAR is superior to a two-component design. However, there are no data in literature to directly support this notion. To address the aforementioned issues, the proposed research project will answer the following questions: 1) To which extent does the PE inlay move with regard to the tibial component; 2) How and to what extent do changes in the position of the talar/tibial component influence biomechanics; 3) How and to what extent does supra- and inframalleolar misalignement influence biomechanics; 4) How and to what extent do the biomechanics of the hindfoot change if the PE inlay is fixed to the tibial component. |
| Financed by |
Foundations and Associations
Foundations and Associations
Foundations and Associations
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08/05/2024
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