title: [Patella fractures in knee arthroplasty].
abstract: Periprosthetic patella fractures occur both with and without retropatellar joint replacement. A non-operative treatment yields satisfactory results with low morbidity. It can be applied in minimally displaced fractures that have an intact retropatellar component and an intact extensor mechanism, combined with an initial immobilization. The surgical treatment is associated with relatively poor results and with high complication rates. There was only minor improvement of functional results, no matter which surgical technique was used. Surgical intervention is still required in fractures with a loosening of the patellar component, considerable dislocations of fragments, and damage to or rupture of the extensor mechanism. In particular, type II fractures require repair of the extensor mechanism and the fracture or patellectomy. Type III fractures require a revision or resection of the patella, a patelloplasty or total patellectomy. In addition, early or late reconstruction using allograft to restore the extensor mechanism can be taken in consideration.
authors.affiliation: Bereich Endoprothetik/Orthopädie, Klinik und Poliklinik für Orthopädie, Unfallchirurgie und Plastische Chirurgie, Universitätsklinikum Leipzig AöR, Liebigstr. 20, Haus 4, 04103, Leipzig, Deutschland. andreas.roth@medizin.uni-leipzig.de.
authors.forename: A
authors.initials: A
authors.lastname: Roth
authors.affiliation: Bereich Endoprothetik/Orthopädie, Klinik und Poliklinik für Orthopädie, Unfallchirurgie und Plastische Chirurgie, Universitätsklinikum Leipzig AöR, Liebigstr. 20, Haus 4, 04103, Leipzig, Deutschland.
authors.forename: M
authors.initials: M
authors.lastname: Ghanem
authors.affiliation: Bereich Endoprothetik/Orthopädie, Klinik und Poliklinik für Orthopädie, Unfallchirurgie und Plastische Chirurgie, Universitätsklinikum Leipzig AöR, Liebigstr. 20, Haus 4, 04103, Leipzig, Deutschland.
authors.forename: J
authors.initials: J
authors.lastname: Fakler
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D003131:Combined Modality Therapy / Q000379:methods; D019317:Evidence-Based Medicine; D005593:Fracture Fixation, Internal / Q000379:methods*; D050723:Fractures, Bone / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy*; D006801:Humans; D010329:Patella / Q000293:injuries* / Q000601:surgery; D019651:Plastic Surgery Procedures / Q000379:methods*; D016896:Treatment Outcome
keywords: Fracture, periprosthetic; Patella; Risk factors; Surgical revision; Total knee replacement