title: Retrospective comparative study shows no significant difference in postural stability between cruciate-retaining (CR) and cruciate-substituting (PS) total knee implant systems.
abstract: Modified postural stability after retaining the posterior cruciate ligament (PCL) in total knee arthroplasty is still discussed controversially. The objective of this study was to evaluate whether a PCL-retaining implant design should be preferred over a PCL-substituting implant design regarding postural stability in one-leg stance and clinical outcome.
  
  
  
  Forty patients underwent total knee arthroplasty, 20 of them with a cruciate-retaining (CR) and 20 of them with a cruciate-substituting (PS) implant system. Postural stability was analysed 6 months postoperatively in one-leg stance using the Biodex Balance System. In addition, the Western Ontario and McMaster Universities Arthritis Index (WOMAC) and Knee Society Score were completed.
  
  
  
  This study shows that there is no significant difference in postural stability between CR and PS) implant systems with PS implants showing better results in WOMAC score.
  
  
  
  In case it is necessary to use a PS implant, no negative influence on postural stability is to be expected compared to a CR implant.
authors.affiliation: Asklepios-Klinikum Bad Abbach, Orthopädische Klinik für die Universität Regensburg, Bad Abbach, Germany. Juergen-Goetz@gmx.de.|Asklepios Klinikum Bad Abbach, Medical Centre University of Regensburg, Kaiser-Karl V.-Allee 3, 93077, Bad Abbach, Germany. Juergen-Goetz@gmx.de.
authors.forename: Juergen
authors.initials: J
authors.lastname: Götz
authors.affiliation: Sportklinik Stuttgart GmbH, Stuttgart, Germany.
authors.forename: Johannes
authors.initials: J
authors.lastname: Beckmann
authors.affiliation: Asklepios-Klinikum Bad Abbach, Orthopädische Klinik für die Universität Regensburg, Bad Abbach, Germany.
authors.forename: Ingo
authors.initials: I
authors.lastname: Sperrer
authors.affiliation: Asklepios-Klinikum Bad Abbach, Orthopädische Klinik für die Universität Regensburg, Bad Abbach, Germany.
authors.forename: Clemens
authors.initials: C
authors.lastname: Baier
authors.affiliation: Asklepios-Klinikum Bad Abbach, Orthopädische Klinik für die Universität Regensburg, Bad Abbach, Germany.
authors.forename: Silvia
authors.initials: S
authors.lastname: Dullien
authors.affiliation: Asklepios-Klinikum Bad Abbach, Orthopädische Klinik für die Universität Regensburg, Bad Abbach, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Grifka
authors.affiliation: MedArtes, Neutraubling, Germany.
authors.forename: Franz
authors.initials: F
authors.lastname: Koeck
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D004856:Postural Balance; D012189:Retrospective Studies
keywords: Biodex Balance System; Cruciate-retaining/cruciate-substituting implant; One-leg stance; Postural stability; Total knee arthroplasty