title: Gait analysis after total hip replacement with hip resurfacing implant or Mallory-head Exeter prosthesis: a randomised controlled trial.
abstract: A key to the analysis of function after total hip replacement (THR) is the ability to identify gait adaptations specific to design features and surgical procedures. In a randomised controlled design, we evaluated the mechanics of gait after THR with a hip resurfacing system or conventional prosthesis. We also investigated whether gait adaptations returned to normal postoperatively. Similar improvements in mechanics of gait were found, except for peak abductor moments, which improved more in the conventional group. Gait speed increased significantly, but with no differences between groups. The increase in walking speed was reflected as significant improvement within groups in most kinematic and kinetic variables. Significant differences between the operated and non-operated hip were seen in all patients, but with no difference between groups. Mean curves of joint angle profiles and moments in all anatomical planes during a gait cycle revealed that gait impairment persisted with no differences between the conventional prosthesis and the resurfacing system.
authors.affiliation: Department of Orthopaedics, Aarhus Sygehus, Aarhus University Hospital, Aarhus C, Denmark. mekp@mail.dk
authors.forename: Mette K
authors.initials: MK
authors.lastname: Petersen
authors.forename: Niels T
authors.initials: NT
authors.lastname: Andersen
authors.forename: Poul
authors.initials: P
authors.lastname: Mogensen
authors.forename: Michael
authors.initials: M
authors.lastname: Voight
authors.forename: Kjeld
authors.initials: K
authors.lastname: Søballe
mesh_terms: D000222:Adaptation, Physiological; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D004185:Disability Evaluation; D005260:Female; D005684:Gait / Q000502:physiology*; D006621:Hip Joint / Q000503:physiopathology / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery; D010146:Pain; D011446:Prospective Studies; D011474:Prosthesis Design; D012720:Severity of Illness Index; D013499:Surface Properties; D016896:Treatment Outcome; D016138:Walking
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