title: [Patella navigation in computer-assisted TKA : Intraoperative measurement of patellar kinematics. Video article].
abstract: BACKGROUND
  Patellofemoral maltracking is a relevant problem after total knee arthroplasty (TKA). Patella navigation is a tool that allows real time monitoring of patella tracking.
  
  
  METHODS
  This video contribution demonstrates the technique of patellofemoral navigation and a possible consequence of intraoperative monitoring. A higher postoperative lateral tilt is addressed with a widening of the lateral retinaculum in a particular manner.
  
  
  CONCLUSIONS
  In selected cases of patellofemoral problems, patella navigation is a helpful tool to evaluate patellofemoral tracking intraoperatively. Modifications of implant position and soft tissue measurements can then prevent postoperative patellofemoral maltracking.
authors.affiliation: Orthopädische Universitätsklinik Regensburg, Asklepios Klinikum Bad Abbach, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Deutschland. hrspringorum@web.de.
authors.forename: H-R
authors.initials: HR
authors.lastname: Springorum
authors.affiliation: Orthopädische Universitätsklinik Regensburg, Asklepios Klinikum Bad Abbach, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Deutschland.
authors.forename: C
authors.initials: C
authors.lastname: Baier
authors.affiliation: Orthopädische Universitätsklinik Regensburg, Asklepios Klinikum Bad Abbach, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Deutschland.
authors.forename: B
authors.initials: B
authors.lastname: Craiovan
authors.affiliation: Orthopädische Universitätsklinik Regensburg, Asklepios Klinikum Bad Abbach, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Deutschland.
authors.forename: G
authors.initials: G
authors.lastname: Maderbacher
authors.affiliation: Orthopädische Universitätsklinik Regensburg, Asklepios Klinikum Bad Abbach, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Deutschland.
authors.forename: T
authors.initials: T
authors.lastname: Renkawitz
authors.affiliation: Orthopädische Universitätsklinik Regensburg, Asklepios Klinikum Bad Abbach, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Deutschland.
authors.forename: J
authors.initials: J
authors.lastname: Grifka
authors.affiliation: Orthopädische Universitätsklinik Regensburg, Asklepios Klinikum Bad Abbach, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Deutschland.
authors.forename: A
authors.initials: A
authors.lastname: Keshmiri
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D006801:Humans; D010329:Patella / Q000000981:diagnostic imaging* / Q000601:surgery*; D057071:Patellofemoral Joint / Q000000981:diagnostic imaging* / Q000601:surgery*; D017755:Prosthesis Fitting / Q000379:methods; D016059:Range of Motion, Articular; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome; D014584:User-Computer Interface
keywords: Intraoperative monitoring; Knee arthroplasty, total; Navigation; Orthopedic surgical procedures; Pain; Patellanavigation