title: The sit-to-stand movement: differences in performance between patients after primary total hip arthroplasty and revision total hip arthroplasty with acetabular bone impaction grafting.
abstract: BACKGROUND
  Little is known about the functional performance of patients after revision total hip arthroplasty with major acetabular bone impaction grafting. In general, these patients are assumed to perform worse due to a more advanced stage of periarticular tissue degeneration and multiple surgeries compared with patients with primary total hip arthroplasty (THA).
  
  
  OBJECTIVE
  The main purpose of this study was to quantify the differences in performance of the sit-to-stand (STS) movement between patients with primary THA and patients with revision THA.
  
  
  METHODS
  In this study, the STS movement was analyzed kinematically (knee and hip angular extension velocity) and kinetically (loading symmetry ratio). Ten patients after primary THA and 10 patients after revision THA with acetabular bone impaction grafting were compared using these 3 rising parameters.
  
  
  RESULTS
  The patients with revision THA performed the STS movement comparably to the patients with primary THA; there were no differences in knee and hip velocity or leg asymmetry during rising.
  
  
  CONCLUSIONS
  The study focused only on kinetic and kinematic aspects, and only patients who were satisfied with their THA were involved.
  
  
  CONCLUSIONS
  This study showed that patients after a revision THA with acetabular bone impaction grafting and cement did not perform the STS movement differently, either kinematically or kinetically, compared with patients with a primary THA.
authors.affiliation: Orthopaedic Research Laboratory, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.
authors.forename: Miranda C
authors.initials: MC
authors.lastname: Boonstra
authors.forename: B Wim
authors.initials: BW
authors.lastname: Schreurs
authors.forename: Nico
authors.initials: N
authors.lastname: Verdonschot
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D002484:Cementation; D005260:Female; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement / Q000502:physiology*; D011446:Prospective Studies; D020127:Recovery of Function / Q000502:physiology; D012086:Reoperation; D016896:Treatment Outcome