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English Abstract
Journal Article
[Megaimplants of the Proximal Femur: Current Concepts].
Zeitschrift Für Orthopädie und Unfallchirurgie 2018 December
In addition to their outstanding significance in the field of tumor orthopaedics, megaprostheses are becoming increasingly important for revision arthroplasty. Despite their wide application, the reported complication and failure rates remain high. The analysis of failure mechanisms roughly allows a breakdown into mechanical and non-mechanical causes; soft-tissue failure, loosening and periprosthetic infection play outstanding roles. Each type of failure can be associated to a specific prosthetic component: To avoid soft tissue failure, muscular connection to the prosthesis is essential; to avoid loosening, the anchoring technique on the stem is crucial; to prevent infection, the surface condition or possibly the coating of the prosthesis seem to play major roles. Some fully-fledged proximal femoral replacement systems have become established on the market and have similar clinical outcomes. However, there are significant differences in anchoring techniques, modularity or module connections and soft tissue connection. In any case, the high failure rates show that there is great potential for future developments. Innovative suggestions for each component are certainly possible through cross-linking to already functioning systems. Together with new findings from basic research, future systems should be able to significantly reduce the rate of prosthetic failures.
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