title: No difference in ROM and knee function between mobile and floating platforms in TKA.
abstract: OBJECTIVE
  The purpose of this study was to determine whether the floating platforms (FP) were superior to rotating platforms (RP) in computer-navigated total knee arthroplasty (TKA) comparing the range of motion (ROM) as well as clinical and subjective function of the knee.
  
  
  METHODS
  This retrospective non-randomized single-centre cohort study includes 255 patients with a primary implanted computer-navigated e.motion™ (Aesculap B. Braun) TKA system, implanted because of clinical and radiological verified gonarthrosis. In 129 patients, the FP platform was implanted, and in 126 patients, the RP platform. As statistical procedures for differences between inlay type RP/FP in ROM and Knee Society Score (KSS) after 3- and 24-month follow-up, an analysis of covariance (with risk factors gender, age, BMI, preoperative ROM and preoperative KSS) was performed.
  
  
  RESULTS
  Although preoperative ROM and knee society function score (KSS part II) were significantly higher in the FP group before surgery, there was no significant difference between RP and FP in ROM and KSS at 3- and 24-month follow-up.
  
  
  CONCLUSIONS
  The FP platform design did not have an advantage in ROM as well as in clinical and subjective knee function compared with the RP platform in computer-navigated TKA neither in early follow-up examinations at 3 months postoperatively nor at long-time follow-up at 24 months postoperatively.
authors: Department of Orthopaedic Surgery, Vienna General Hospita Austria, Medical University of Vienna, Waehringer Gürtel 18-20, 1090, Vienna, Austria, johannes.holinka@meduniwien.ac.at.
authors: Johannes
authors: J
authors: Holinka
authors: Navid
authors: N
authors: Bahrami
authors: Richard
authors: R
authors: Lass
authors: Sophie
authors: S
authors: Frantal
authors: Reinhard
authors: R
authors: Windhager
authors: Hugo Axel
authors: HA
authors: Wanivenhaus
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D020370:Osteoarthritis, Knee / Q000503:physiopathology / Q000601:surgery; D016059:Range of Motion, Articular / Q000502:physiology*; D012189:Retrospective Studies; D012307:Risk Factors; D025321:Surgery, Computer-Assisted; D016896:Treatment Outcome