Assembly force and taper angle difference influence the relative motion at the stem-neck interface of bi-modular hip prostheses

Henning Haschke, Sabrina Y. Jauch-Matt, Kay Sellenschloh, Gerd Huber & Michael Morlock
Bi-modular hip arthroplasty prostheses allow adaptation to the individual patient anatomy and the combination of different materials but introduce an additional interface, which was related lately to current clinical issues. Relative motion at the additional taper interface might increase the overall risk of fretting, corrosion, metallic debris and early failure. The aim of this study was to investigate whether the assembly force influences the relative motion and seating behaviour at the stem-neck interface of a...
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