Finite Element Approach Towards Selection of Appropriate Materials to Redistribute Peak Plantar Pressure in Diabetic Foot with Neuropathy

Selecting Appropriate Materials for Diabetic Foot

Authors

  • Muhammad Nouman Department of Biomedical Science and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University
  • Desmond Y.R. Chong Engineering Cluster, Singapore Institute of Technology, Singapore
  • Surapong Chatpun Department of Biomedical Science and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University

DOI:

https://doi.org/10.31584/psumj.2021247166

Keywords:

custom made insole, diabetic foot, finite element analysis, insole materials, peak plantar pressure

Abstract

Objective: The aim of this study was to assess the effect of customized insole (CMI) variations on plantar pressure in diabetic foot with neuropathy, using finite element analysis (FEA).
Material and Methods: A three-dimensional foot model was constructed using FEA to study the peak contact pressure between the foot and the CMI. Nora® Lunalastike, Ethylene Vinyl Acetate (EVA), Amfit® and TPU were chosen for insole materials; and from these eight CMI models were created. The top surface of the tibia and fibula were fixed, and a displacement of 3 mm was exerted from the ground along with upwards Achilles tendon force.
Results: The peak contact pressure contour showed that a softer material, CMI-A (E = 1.04 MPa), resulted in a better reduction of peak contact pressure compared to a stiffer material; CMI-D (E = 11 MPa). In addition, it was shown that the use of a single material to fabricate the CMI resulted in higher peak contact pressure; with the exception of CMI-A, in comparison to a dual-layer material of CMI-E and CMI-F. Using FEA, can effectively enhance the insole material selection process, without need of a trial and error practice in a clinical setting.
Conclusion: The use of dual materials to fabricate CMIs, with the softer material as a top layer, is beneficial compared to a stiffer top layer material in the reduction of peak plantar pressure for diabetic foot with neuropathy.

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Author Biographies

Muhammad Nouman, Department of Biomedical Science and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University

Muhammad Nouman received his Bachelor degree in 2014 from Sirindhorn School of Prosthetics and Orthotics, Siriraj Hospital, Mahidol University and a Master’s degree from the Institute of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, where is currently working towards the Ph.D. degree. His current research interests include finite element analysis and its clinical application towards diabetic foot with neuropathy.

Desmond Y.R. Chong, Engineering Cluster, Singapore Institute of Technology, Singapore

Dr. Desmond Y.R. Chong received his Bachelor of Engineering (Mechanical Engineering) and Master of Engineering (Mechanical Engineering), both from the Nanyang Technological University, Singapore, and a PhD in Orthopaedic Biomechanics from Imperial College London, UK. He is currently an Associate Professor in Singapore Institute of Technology, Singapore. His research interests are in biomechanics, computational modelling and experimentation, design and biomechanical characterization for orthopaedic applications, gait analysis and human motion, and bone mechanics.

Surapong Chatpun, Department of Biomedical Science and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University

Dr. Surapong Chatpun received his Bachelor of Engineering (Mechanical Engineering) from Chulalongkorn University, Thailand and his Master of Engineering (Mechanical Engineering) from The University of Tokyo, Japan. He obtained his Ph.D. (Bioengineering) in 2010 from The University of California, San Diego, US. He is currently an Assistant Professor at the Institute of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Hatyai, Songkhla, Thailand. His research interests are Cardiovascular Engineering, Computational modeling, Biomechanics and Medical devices.

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Published

2021-07-01

How to Cite

1.
Nouman M, Chong DY, Chatpun S. Finite Element Approach Towards Selection of Appropriate Materials to Redistribute Peak Plantar Pressure in Diabetic Foot with Neuropathy: Selecting Appropriate Materials for Diabetic Foot. PSU Med J [Internet]. 2021 Jul. 1 [cited 2022 Aug. 20];1(2):43-54. Available from: https://he01.tci-thaijo.org/index.php/PSUMJ/article/view/247166

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