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J Arthroplasty. 2015 Nov;30(11):2027-33. doi: 10.1016/j.arth.2015.05.024. Epub 2015 May 19.

Sit-To-Stand Biomechanics Before and After Total Hip Arthroplasty.

Author information

1
Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware; Faculty of Rehabilitation Sciences, The University of Jordan, Amman, Jordan.
2
Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware.
3
Delaware Orthopaedic Specialists, Newark, Delaware.
4
Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware; Department of Physical Therapy, University of Delaware, Newark, Delaware.

Abstract

The purpose of this study was to evaluate changes in movement patterns during a sit-to-stand (STS) task before and after total hip arthroplasty (THA), and to compare biomechanical outcomes after THA to a control group. Forty-five subjects who underwent THA and twenty-three healthy control subjects participated in three-dimensional motion analysis. Pre-operatively, subjects exhibited inter-limb movement asymmetries with lower vertical ground reaction force (VGRF) and smaller moments on the operated limb. Although there were significant improvements in movement symmetry 3 months after THA, patients continued to demonstrate lower VGRF and smaller moments on the operated limb compared to non-operated and to control limbs. Future studies should identify the contributions of physical impairments and the influence of surgical approach on STS biomechanics.

KEYWORDS:

biomechanics; joint moment; lateral trunk angle; sit to stand; total hip arthroplasty

PMID:
26117068
PMCID:
PMC4640963
DOI:
10.1016/j.arth.2015.05.024
[Indexed for MEDLINE]
Free PMC Article

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