Finite Element Analysis of Stress and Wear Characterization in Total Ankle Replacements

Bradley Jay Elliot; Dinesh Gundapaneni; Tarun Goswami

doi:10.1016/j.jmbbm.2014.01.020

Finite Element Analysis of Stress and Wear Characterization in Total Ankle Replacements

Bradley Jay Elliot, Dinesh Gundapaneni, Tarun Goswami

Wright State University

Research output: Contribution to journal › Article › peer-review

Abstract

Total Ankle <a href="https://www.sciencedirect.com/topics/engineering/arthroplasty" title="Learn more about Arthroplasty from ScienceDirect's AI-generated Topic Pages"> Arthroplasty </a> is performed in order to reduce the pain and loss of ambulation in patients with various forms of arthritis and trauma. Although replacement devices fail by a number of mechanisms, wear in the <a href="https://www.sciencedirect.com/topics/materials-science/polyethylene" title="Learn more about polyethylene from ScienceDirect's AI-generated Topic Pages"> polyethylene </a> liner constitutes one of the dominating failure modes. This leads to instability and loosening of the implant. Mechanisms that contribute to wear in the liners are high contact and subsurface stresses that break down the material over time. Therefore, it is important to understand the gait that generates these stresses. Methods to characterize and decrease wear in Ohio Total Ankle Replacements (TARs) have been performed in this research. This research utilizes <a href="https://www.sciencedirect.com/topics/engineering/finite-element-analysis" title="Learn more about finite element analysis from ScienceDirect's AI-generated Topic Pages"> finite element analysis </a> of Wright State University (WSU) patented TAR models. From the Finite element analysis (FEA) results, mathematical models of contact conditions and wear mechanics were developed. The maximum wear rate values obtained in the study (at 25.598 MPa, 3.74 mm 3 /year) and maximum surface Mises stress obtained with new optimization model (11.52 MPa) seem to be comparable with the maximum wear values obtained in other similar studies. These models were used to determine the best methods for wear characterization and reduction. Furthermore, optimization models were developed based on geometry of the implants. These equations optimize geometry, thus <a href="https://www.sciencedirect.com/topics/engineering/congruency" title="Learn more about congruency from ScienceDirect's AI-generated Topic Pages"> congruency </a> and anatomical simulations for total ankle implants.

Original language	American English
Journal	Journal of the Mechanical Behavior of Biomedical Materials
Volume	34
DOIs	https://doi.org/10.1016/j.jmbbm.2014.01.020
State	Published - Jun 1 2014

Disciplines

Biomedical Engineering and Bioengineering
Engineering
Industrial Engineering
Operations Research, Systems Engineering and Industrial Engineering

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title = "Finite Element Analysis of Stress and Wear Characterization in Total Ankle Replacements",

abstract = " Total Ankle Arthroplasty is performed in order to reduce the pain and loss of ambulation in patients with various forms of arthritis and trauma. Although replacement devices fail by a number of mechanisms, wear in the polyethylene liner constitutes one of the dominating failure modes. This leads to instability and loosening of the implant. Mechanisms that contribute to wear in the liners are high contact and subsurface stresses that break down the material over time. Therefore, it is important to understand the gait that generates these stresses. Methods to characterize and decrease wear in Ohio Total Ankle Replacements (TARs) have been performed in this research. This research utilizes finite element analysis of Wright State University (WSU) patented TAR models. From the Finite element analysis (FEA) results, mathematical models of contact conditions and wear mechanics were developed. The maximum wear rate values obtained in the study (at 25.598 MPa, 3.74 mm 3 /year) and maximum surface Mises stress obtained with new optimization model (11.52 MPa) seem to be comparable with the maximum wear values obtained in other similar studies. These models were used to determine the best methods for wear characterization and reduction. Furthermore, optimization models were developed based on geometry of the implants. These equations optimize geometry, thus congruency and anatomical simulations for total ankle implants. ",

author = "Elliot, {Bradley Jay} and Dinesh Gundapaneni and Tarun Goswami",

year = "2014",

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doi = "10.1016/j.jmbbm.2014.01.020",

language = "American English",

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AU - Gundapaneni, Dinesh

AU - Goswami, Tarun

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Y1 - 2014/6/1

N2 - Total Ankle Arthroplasty is performed in order to reduce the pain and loss of ambulation in patients with various forms of arthritis and trauma. Although replacement devices fail by a number of mechanisms, wear in the polyethylene liner constitutes one of the dominating failure modes. This leads to instability and loosening of the implant. Mechanisms that contribute to wear in the liners are high contact and subsurface stresses that break down the material over time. Therefore, it is important to understand the gait that generates these stresses. Methods to characterize and decrease wear in Ohio Total Ankle Replacements (TARs) have been performed in this research. This research utilizes finite element analysis of Wright State University (WSU) patented TAR models. From the Finite element analysis (FEA) results, mathematical models of contact conditions and wear mechanics were developed. The maximum wear rate values obtained in the study (at 25.598 MPa, 3.74 mm 3 /year) and maximum surface Mises stress obtained with new optimization model (11.52 MPa) seem to be comparable with the maximum wear values obtained in other similar studies. These models were used to determine the best methods for wear characterization and reduction. Furthermore, optimization models were developed based on geometry of the implants. These equations optimize geometry, thus congruency and anatomical simulations for total ankle implants.

AB - Total Ankle Arthroplasty is performed in order to reduce the pain and loss of ambulation in patients with various forms of arthritis and trauma. Although replacement devices fail by a number of mechanisms, wear in the polyethylene liner constitutes one of the dominating failure modes. This leads to instability and loosening of the implant. Mechanisms that contribute to wear in the liners are high contact and subsurface stresses that break down the material over time. Therefore, it is important to understand the gait that generates these stresses. Methods to characterize and decrease wear in Ohio Total Ankle Replacements (TARs) have been performed in this research. This research utilizes finite element analysis of Wright State University (WSU) patented TAR models. From the Finite element analysis (FEA) results, mathematical models of contact conditions and wear mechanics were developed. The maximum wear rate values obtained in the study (at 25.598 MPa, 3.74 mm 3 /year) and maximum surface Mises stress obtained with new optimization model (11.52 MPa) seem to be comparable with the maximum wear values obtained in other similar studies. These models were used to determine the best methods for wear characterization and reduction. Furthermore, optimization models were developed based on geometry of the implants. These equations optimize geometry, thus congruency and anatomical simulations for total ankle implants.

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DO - 10.1016/j.jmbbm.2014.01.020

M3 - Article

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JO - Journal of the Mechanical Behavior of Biomedical Materials

JF - Journal of the Mechanical Behavior of Biomedical Materials

ER -

Finite Element Analysis of Stress and Wear Characterization in Total Ankle Replacements

Abstract

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