Intra-articular Contact Stress Distributions at the Ankle throughout Stance Phase – Patient-Specific Finite Element Analysis as a Metric of Degeneration Propensity

Donald D Anderson; Jane K Goldsworthy; Kiran Shivanna; Nicole M Grosland; Douglas R Pedersen; Thaddeus P Thomas; Yuki Tochigi; J.Lawrence Marsh; Thomas D Brown

doi:10.1007/s10237-006-0025-2

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Intra-articular Contact Stress Distributions at the Ankle throughout Stance Phase – Patient-Specific Finite Element Analysis as a Metric of Degeneration Propensity

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Intra-articular Contact Stress Distributions at the Ankle throughout Stance Phase – Patient-Specific Finite Element Analysis as a Metric of Degeneration Propensity

Donald D Anderson, Jane K Goldsworthy, Kiran Shivanna, Nicole M Grosland, Douglas R Pedersen, Thaddeus P Thomas, Yuki Tochigi, J.Lawrence Marsh and Thomas D Brown

Biomechanics and modeling in mechanobiology, Vol.5(2-3), pp.82-89

06/2006

DOI: 10.1007/s10237-006-0025-2

PMCID: PMC2194754

PMID: 16520960

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https://www.ncbi.nlm.nih.gov/pmc/articles/2194754View

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Abstract

A contact finite element (FE) formulation is introduced, amenable to patient-specific analysis of cumulative cartilage mechano-stimulus attributable to habitual functional activity. CT scans of individual human ankles are segmented to delineate bony margins. Each bone surface is projected outward to create a second surface, and the intervening volume is then meshed with continuum hexahedral elements. The tibia is positioned relative to the talus into a weight-bearing apposition. The articular members are first engaged under light preload, then plantar-/dorsi-flexion kinematics and resultant loadings are input for serial FE solutions at 13 instants of the stance phase of level walking gait. Cartilage stress histories are post-processed to recover distributions of cumulative stress-time mechano-stimulus, a metric of degeneration propensity. Consistency in computed contact stress exposures presented for seven intact ankles stood in contrast to the higher magnitude and more focal exposures in an incongruously reduced tibial plafond fracture. This analytical procedure provides patient-specific estimates of degeneration propensity due to various mechanical abnormalities, and it provides a platform from which the mechanical efficacy of alternative surgical interventions can be estimated.

Details

Title: Subtitle: Intra-articular Contact Stress Distributions at the Ankle throughout Stance Phase – Patient-Specific Finite Element Analysis as a Metric of Degeneration Propensity
Creators: Donald D Anderson - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Jane K Goldsworthy - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Kiran Shivanna - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Nicole M Grosland - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Douglas R Pedersen - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Thaddeus P Thomas - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Yuki Tochigi - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
J.Lawrence Marsh - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Thomas D Brown - Department of Orthopaedics & Rehablilitation, University of Iowa, Iowa City IA
Resource Type: Journal article
Publication Details: Biomechanics and modeling in mechanobiology, Vol.5(2-3), pp.82-89
DOI: 10.1007/s10237-006-0025-2
PMID: 16520960
PMCID: PMC2194754
NLM abbreviation: Biomech Model Mechanobiol
ISSN: 1617-7959
eISSN: 1617-7940
Language: English
Date published: 06/2006
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation; Industrial and Systems Engineering; Injury Prevention Research Center
Record Identifier: 9984040265202771

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