title: Do surgical patellar interventions restore patellar kinematics in fixed-bearing, cruciate-retaining total knee arthroplasty?: An in vitro study.
abstract: Despite different surgical patellar interventions, the decision how to treat the patella during TKA remains controversial. The purpose of this study was to quantify the effect of different reconstructive patellar interventions on patellar kinematics during TKA using optical computer navigation. We implanted ten navigated TKAs in full body specimens. During passive motion, the effect of different surgical patellar interventions on patellar kinematics was analysed. A contrarily tilt behaviour was observed in the TKA group without patellar intervention compared to the natural knee. Lateral release led to similar tilt values (P < 0.05). All surgical interventions led to a 3 to 5mm medial shift of the patella (P < 0.05). None of the analysed surgical patellar interventions could restore natural patellar kinematics after TKA.
authors.affiliation: Department of Orthopaedic Surgery, University of Regensburg, Bad Abbach, Germany.
authors.forename: Armin
authors.initials: A
authors.lastname: Keshmiri
authors.affiliation: Department of Orthopaedic Surgery, University of Regensburg, Bad Abbach, Germany.
authors.forename: Günther
authors.initials: G
authors.lastname: Maderbacher
authors.affiliation: Department of Orthopaedic Surgery, University of Regensburg, Bad Abbach, Germany.
authors.forename: Clemens
authors.initials: C
authors.lastname: Baier
authors.affiliation: Department of Orthopaedic Surgery, Cantonal Hospital Bruderholz, Bruderholz, Swiss.
authors.forename: Werner
authors.initials: W
authors.lastname: Müller
authors.affiliation: Department of Orthopaedic Surgery, University of Regensburg, Bad Abbach, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Grifka
authors.affiliation: Department of Orthopaedic Surgery, University of Regensburg, Bad Abbach, Germany.
authors.forename: Hans Robert
authors.initials: HR
authors.lastname: Springorum
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D002102:Cadaver; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D010329:Patella / Q000503:physiopathology / Q000601:surgery*; D016059:Range of Motion, Articular; D025321:Surgery, Computer-Assisted
keywords: computer navigation; patella tracking; patellar kinematics; surgical patellar interventions; total knee arthroplasty