title: Walking pattern in 9 women with hip dysplasia 18 months after periacetabular osteotomy.
abstract: BACKGROUND
  Periacetabular osteotomy improves radiographic predictors of osteoarthrosis and diminishes pain and functional impairment. No changes in function quantified by gait analysis have yet been documented. We evaluated the functional outcome of periacetabular osteotomy in relation to gait.
  
  
  METHODS
  The gait pattern of 9 women (median age 39 years) with hip dysplasia who were treated with unilateral periacetabular osteotomy was analyzed before periacetabular osteotomy and an average of 1.5 years afterwards. Data were collected using 5 video cameras and 2 force plates. An inverse dynamics approach was used to calculate sagittal joint angles and moments in the stance phase.
  
  
  RESULTS
  Postoperatively, all subjects walked with an increased extension of the knee joint during the entire stance phase compared to the preoperative movement pattern.
  
  
  CONCLUSIONS
  The subjects achieved a more upright walking pattern but continued to relieve the hip joint by maintaining a reduced flexor moment.
authors.affiliation: The Medical Research Unit, Ringkøbing, Denmark. feengp@ringamt.dk
authors.forename: Eva N G
authors.initials: EN
authors.lastname: Pedersen
authors.forename: Tine
authors.initials: T
authors.lastname: Alkjaer
authors.forename: Kjeld
authors.initials: K
authors.lastname: Søballe
authors.forename: Erik B
authors.initials: EB
authors.lastname: Simonsen
mesh_terms: D000077:Acetabulum / Q000601:surgery; D000328:Adult; D000843:Ankle Joint / Q000503:physiopathology; D005260:Female; D005500:Follow-Up Studies; D005684:Gait / Q000502:physiology; D006618:Hip Dislocation, Congenital / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D006621:Hip Joint / Q000503:physiopathology; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000209:etiology / Q000517:prevention & control; D010027:Osteotomy / Q000379:methods* / Q000534:rehabilitation; D020127:Recovery of Function; D016896:Treatment Outcome; D016138:Walking / Q000502:physiology