naa a22 4500 510760651 CHVBK 20180411083138.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11420-013-9328-x doi (NATIONALLICENCE)springer-10.1007/s11420-013-9328-x Computer-Assisted Navigation in Patellofemoral Arthroplasty: a New Technique to Improve Rotational Position of the Trochlea [Elektronische Daten] [Philippe Hernigou, Charles Flouzat-Lachaniette, William Delblond, Pascal Duffiet, Didier Julian] Background: Maltracking or subluxation is one of the complications of patellofemoral arthroplasty. Questions/Purposes: We questioned whether the computed navigation system can improve patellar tracking in patients with patellofemoral arthroplasty (PFA). Methods: Between 2007 and 2010 we performed 15 patellofemoral arthroplasties using the Ceraver PFA and navigation assistance. Fifteen other patients underwent surgery without navigation during the same period and acted as a control group. The rotation of the native trochlea as measured using the epicondylar line as a reference before surgery and the rotation of the trochlear component and the trochlear twist angle were assessed with computed tomography (CT) scan after surgery. Results: The mean follow-up was 3years (range, 2-5years). The group with navigation had no patellofemoral complications and better clinical scores. The group without navigation had abnormal patellofemoral tracking in 5 of the 15 patients. CT scan demonstrated excessive internal component rotation, as compared with patients without complications. This excessive internal rotation was proportional to the severity of the patellofemoral maltracking. Conclusions: The short-term results suggest that navigation can lead to better trochlear rotation which, in our hands, is associated with fewer cases of patellar maltracking and better overall clinical scores. Hospital for Special Surgery, 2013 patellofemoral arthroplasty nationallicence computer-assisted navigation nationallicence knee nationallicence patella nationallicence Hernigou Philippe Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut Flouzat-Lachaniette Charles Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut Delblond William Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut Duffiet Pascal Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut Julian Didier Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut HSS Journal ® Springer US; http://www.springer-ny.com 9/2(2013-07-01), 118-122 1556-3316 9:2<118 2013 9 11420 https://doi.org/10.1007/s11420-013-9328-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11420-013-9328-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hernigou Philippe Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut NATIONALLICENCE 700 1- Flouzat-Lachaniette Charles Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut NATIONALLICENCE 700 1- Delblond William Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut NATIONALLICENCE 700 1- Duffiet Pascal Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut NATIONALLICENCE 700 1- Julian Didier Hospital Henri Mondor, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, France aut NATIONALLICENCE 773 0- HSS Journal ® Springer US; http://www.springer-ny.com 9/2(2013-07-01), 118-122 1556-3316 9:2<118 2013 9 11420 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer