title: Navigation-assisted versus conventional total knee replacement: no difference in patient-reported outcome measures (PROMs) at 1 and 2 years.
abstract: BACKGROUND
  Navigation technique for total knee replacement has been shown to improve accuracy of prosthesis alignment in several studies. The purpose was to compare the patient-reported outcome measures in primary total knee replacement (TKR) using navigation versus conventional surgical technique at 1- and 2-year follow-up.
  
  
  METHODS
  A retrospective review of prospectively collected patient-reported outcome data for 351 consecutively performed primary TKR was included in the study. The study group (N = 113) included patients who had Triathlon TKR using articular surface mounted (ASM Stryker) navigation technique and control group (N = 238) included patients who had Triathlon TKR using conventional jig. In addition to the WOMAC (Western Ontario and McMaster University Osteoarthritis Index) and SF-36 (Medical Outcomes Trust Short Form-36), a short self-report questionnaire evaluating the level of satisfaction, quality of life and whether patients would undergo knee replacement again.
  
  
  RESULTS
  WOMAC: no significant difference between the groups was noted in mean WOMAC pain, function and stiffness scores at 1- and 2-year follow-up. SF-36: no significant difference between the groups was seen except in the physical function component of score at 1 year (p = 0.019). Navigation group mean 56.78 (CI 51.06-62.5) versus conventional group mean 48.34 (44.68-52.01) but this difference was not observed at 2-year follow-up.
  
  
  CONCLUSIONS
  The overall patient-reported outcome scores improved after total knee replacement but appear to be comparable in both groups at 1- and 2-year follow-up.
authors: University Hospital of North Durham, Durham, DH1 5TW, UK. kiransingisetti@gmail.com.
authors: Kiran
authors: K
authors: Singisetti
authors: School of Sports and Exercise Sciences, University of Kent, Kent, UK. k.muthumayandi@kent.ac.uk.
authors: Karthikeyan
authors: K
authors: Muthumayandi
authors: Royal Victoria Infirmary, Newcastle upon Tyne, NE1 4LP, UK. Zaid_aburub@yahoo.com.|Department of Trauma and Orthopaedics, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne, NE4 1LP, UK. Zaid_aburub@yahoo.com.
authors: Zaid
authors: Z
authors: Abual-Rub
authors: Freeman Hospital, Freeman Road, Newcastle upon Tyne, UK. david.weir@nuth.nhs.uk.
authors: David
authors: D
authors: Weir
mesh_terms: D000328:Adult; D019645:Arthroplasty, Replacement, Knee / Q000379:methods / Q000706:statistics & numerical data; D006801:Humans; D008875:Middle Aged; D063868:Patient Outcome Assessment; D011788:Quality of Life; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000379:methods / Q000706:statistics & numerical data; D016896:Treatment Outcome
keywords: Conventional; Functional outcome; Navigation; Patient-reported outcomes; Total knee replacement