Gait Patterns After Total Hip Arthroplasty and Surface Replacement Arthroplasty  Julie Nantel, MSc, Nicolas Termoz, PhD, Pascal-André Vendittoli, MD, MSc, Martin Lavigne, MD, François Prince, PhD  Archives of Physical Medicine and Rehabilitation  Volume 90, Issue 3, Pages 463-469 (March 2009) DOI: 10.1016/j.apmr.2008.08.215 Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

Fig 1 Hip moment and power curves in the sagittal and frontal planes for control, surface hip arthroplasty, and THA groups. The dash-dot lines delimit the phases corresponding to the H2S power burst in the sagittal plane and the H3F in the frontal plane. A positive power value indicates an energy generation (concentric contraction), and a negative power value specifies energy absorption (eccentric contraction). The kinetic data were normalized to body weight and reported in percentage of the gait cycle to facilitate the intersubject comparison. The gait cycle was defined from 0% (first heel contact) to 100% (the subsequent ipsilateral heel contact), with the toe-off occurring at 60%. *THA is significantly different from the control and surface hip arthroplasty. †THA and surface hip arthroplasty groups are significantly different from the control group. Archives of Physical Medicine and Rehabilitation 2009 90, 463-469DOI: (10.1016/j.apmr.2008.08.215) Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions