An Engineering Evaluation of Ankle ProstheticsConference Papers
Document TypeConference Paper
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AbstractThere are a wide range of different types of ankle replacements on the market today each with adifferent mechanical design. Unfortunately the results of ankle replacements are not as good as hipand knee replacements; this is due to the complexity of the ankle joint. In the early days of anklereplacements some of the prosthetics only lasted 4 months. Recent developments have improved thelongevity of the replacements although, there are still many complications and failures of thereplacements, these include; the prosthetic components migrating into the bone, the componentsfailing due to stresses induced by the forces and the surgery itself i.e. the incision site.This paper will analyse the documented medical failures of the replacements from a mechanicalengineering perspective. Three ankle prosthetics are investigated in this paper: the Buechel-Pappas,the Scandinavian Total Ankle Replacement (STAR) and the Hintegra ankle replacement. Medicalpublications are examined to isolate the mechanical failure mechanisms of the replacements and tocategorise and quantify these failures in engineering terms. These failures will include wearcomplications and also dislocations of the prosthetic parts among other failures. The paper will conclude by comparing the mechanical reliability of the four prosthetics examined.
Citation InformationThian, C., Tiernan, S., McEvoy, F., Flavin, R. ''An Engineering Evaluation of Ankle Prosthetics'', 2008, 25th International Manufacturing Conference, September, DIT. Dublin.