Acetabular fractures present a clinical challenge due to the complicated anatomy and difficulty of exposure, reduction, and fixation. There are several indications for surgery including any fracture which is displaced more than 2mm, failure to maintain reduction by closed means, or, for transverse fractures, a roof-arc angle less than 45 degrees (1,2). The last indication was determined by a cadaver model that only evaluated hip stability in the single leg stance phase of the gait cycle (3). Kinesiological models have well established that the magnitude and direction of the joint contact force can deviate substantially from the mechanics of gait loading, particularly for such activities of daily living as sit-to-stand maneuvers and climbing stairs (4,5). Thus, the criteria for fracture stability established using gait-only loading conditions may be inadequate for other activities of daily living. Basic engineering principles would dictate that the most conservative estimate of dislocation potential be used in managing these cases clinically; and it is therefore important to re-evaluate fracture management criteria in alternative loading conditions that have a high potential for dislocation.
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ASME 2010 Summer Bioengineering Conference
June 16–19, 2010
Naples, Florida, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
978-0-7918-4403-8
PROCEEDINGS PAPER
Propensity for Hip Dislocation in Gait Loading Versus Sit-to-Stand Maneuvers: Implications for Surgical Management of Acetabular Fractures Available to Purchase
Erik McDonald,
Erik McDonald
University of California at San Francisco, San Francisco, CA
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Meir Marmor,
Meir Marmor
University of California at San Francisco, San Francisco, CA
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Jenni M. Buckley,
Jenni M. Buckley
University of California at San Francisco, San Francisco, CA
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Amir Matityahu
Amir Matityahu
University of California at San Francisco, San Francisco, CA
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Erik McDonald
University of California at San Francisco, San Francisco, CA
Meir Marmor
University of California at San Francisco, San Francisco, CA
Jenni M. Buckley
University of California at San Francisco, San Francisco, CA
Amir Matityahu
University of California at San Francisco, San Francisco, CA
Paper No:
SBC2010-19202, pp. 17-18; 2 pages
Published Online:
July 15, 2013
Citation
McDonald, E, Marmor, M, Buckley, JM, & Matityahu, A. "Propensity for Hip Dislocation in Gait Loading Versus Sit-to-Stand Maneuvers: Implications for Surgical Management of Acetabular Fractures." Proceedings of the ASME 2010 Summer Bioengineering Conference. ASME 2010 Summer Bioengineering Conference, Parts A and B. Naples, Florida, USA. June 16–19, 2010. pp. 17-18. ASME. https://doi.org/10.1115/SBC2010-19202
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