Physical validation of a patient-specific contact finite element model of the ankle

Donald D Anderson; Jane K Goldsworthy; Wendy Li; M James  Rudert; Yuki Tochigi; Thomas D Brown

doi:10.1016/j.jbiomech.2007.01.024

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Physical validation of a patient-specific contact finite element model of the ankle

Journal article

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Peer reviewed

Physical validation of a patient-specific contact finite element model of the ankle

Donald D Anderson, Jane K Goldsworthy, Wendy Li, M James Rudert, Yuki Tochigi and Thomas D Brown

Journal of biomechanics, Vol.40(8), pp.1662-1669

2007

DOI: 10.1016/j.jbiomech.2007.01.024

PMCID: PMC1945165

PMID: 17433333

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Abstract

A validation study was conducted to determine the extent to which computational ankle contact finite element (FE) results agreed with experimentally measured tibio-talar contact stress. Two cadaver ankles were loaded in separate test sessions, during which ankle contact stresses were measured with a high-resolution (Tekscan) pressure sensor. Corresponding contact FE analyses were subsequently performed for comparison. The agreement was good between FE-computed and experimentally measured mean (3.2% discrepancy for one ankle, 19.3% for the other) and maximum (1.5% and 6.2%) contact stress, as well as for contact area (1.7% and 14.9%). There was also excellent agreement between histograms of fractional areas of cartilage experiencing specific ranges of contact stress. Finally, point-by-point comparisons between the computed and measured contact stress distributions over the articular surface showed substantial agreement, with correlation coefficients of 90% for one ankle and 86% for the other. In the past, general qualitative, but little direct quantitative agreement has been demonstrated with articular joint contact FE models. The methods used for this validation enable formal comparison of computational and experimental results, and open the way for objective statistical measures of regional correlation between FE-computed contact stress distributions from comparison articular joint surfaces (e.g., those from an intact versus those with residual intra-articular fracture incongruity).

Ankle

Validation

Articular joint contact

Finite element

Details

Title: Subtitle: Physical validation of a patient-specific contact finite element model of the ankle
Creators: Donald D Anderson - Departments of Orthopaedics and Rehabilitation, The University of Iowa, Iowa City, IA, USA
Jane K Goldsworthy - Biomedical Engineering, The University of Iowa, Iowa City, IA, USA
Wendy Li - Biomedical Engineering, The University of Iowa, Iowa City, IA, USA
M James Rudert - Departments of Orthopaedics and Rehabilitation, The University of Iowa, Iowa City, IA, USA
Yuki Tochigi - Departments of Orthopaedics and Rehabilitation, The University of Iowa, Iowa City, IA, USA
Thomas D Brown - Departments of Orthopaedics and Rehabilitation, The University of Iowa, Iowa City, IA, USA
Resource Type: Journal article
Publication Details: Journal of biomechanics, Vol.40(8), pp.1662-1669
DOI: 10.1016/j.jbiomech.2007.01.024
PMID: 17433333
PMCID: PMC1945165
NLM abbreviation: J Biomech
ISSN: 0021-9290
eISSN: 1873-2380
Publisher: Elsevier Ltd
Language: English
Date published: 2007
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation; Industrial and Systems Engineering
Record Identifier: 9984040266102771

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