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Finite Element Predictions of Joint Contact Mechanics and Acetabular Curvature in Dysplastic Human Hips

[+] Author Affiliations
Corinne R. Henak, Christine L. Abraham, Andrew E. Anderson, Christopher L. Peters, Steve A. Maas, Benjamin J. Ellis, Jeffrey A. Weiss

University of Utah, Salt Lake City, UT

Paper No. SBC2013-14126, pp. V01AT16A001; 2 pages
doi:10.1115/SBC2013-14126
From:
  • ASME 2013 Summer Bioengineering Conference
  • Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments
  • Sunriver, Oregon, USA, June 26–29, 2013
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-5560-7
  • Copyright © 2013 by ASME

abstract

Acetabular dysplasia is characterized by a shallow acetabulum and is believed to cause accelerated hip osteoarthritis (OA) via altered mechanics (Fig. 1 A, B) [1]. Dysplastic acetabula are also described as more flat and less congruent than normal acetabula [2]. However, the relative contributions of altered labrum and cartilage contact mechanics, as well as quantitative differences in curvature are poorly understood in the dysplastic hip compared to the normal hip. Clinical observations of hypertrophied and damaged labra indicate altered labrum mechanics in dysplastic hips [3]. Finite element (FE) studies demonstrate abnormal cartilage mechanics in dysplastic hips, but are limited to models that omit the labrum or utilize idealized joint geometry (e.g., [4]). Therefore, the objectives of this study were to compare contact mechanics and curvature between normal and dysplastic hips using subject-specific FE models.

Copyright © 2013 by ASME

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