Unerkannte Dissoziation des bipolaren Avantage®-Hüftprothesensystems (Biomet®) nach geschlossener Reposition einer Hüftluxation: eine seltene Komplikation

Zusammenfassung

Eine 84-jährige Patientin wurde mit einer periprothetischen Femurfraktur bei einliegender Hüftprothese (Avantage-Pfannensystem, Biomet®) in unserer Notfallambulanz vorstellig. Die konventionellen Röntgenaufnahmen von Becken und linkem Hüftgelenk zeigten neben der periprothetischen Fraktur Typ Vancouver B2 eine Dezentrierung des Prothesenschafts. Die weiterführende CT-Diagnostik zeigte eine Dissoziation des Polyethyleninlays vom Prothesenkopf, die sich im Rahmen einer bereits 3 Jahre zurückliegenden geschlossenen Reposition nach erfolgter postoperativer Luxation ereignete. Dieser Fall zeigt die Relevanz einer genauen Analyse von Röntgenkontrollaufnahmen post repositionem bez. der exakten Artikulation der Prothesenelemente.

Abstract

An 84-year-old female patient was admitted to our emergency department with a periprosthetic fracture of the left femur with an implanted Avantage prosthesis (Biomet®). Conventional X-ray images revealed besides the fracture a lateralisation of the prosthesis stem. An additional CT scan showed a dissociation of the polyethylene inlay from the head of the prosthesis which took place 3 years ago in the course of a closed reposition of a postoperative luxation. This event shows the relevance of a precise analysis of X-ray images after reposition regarding the exact articulation of the different prosthesis components.

Schlüsselwörter

Hüftluxation - Avantage - Biomet - Komplikation

Key words

hip dislocation - Avantage - Biomet - complication

• Literatur

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