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Case Report

A Simulation Case Study of Knee Joint Compressive Stress during the Stance Phase in Severe Knee Osteoarthritis Using Finite Element Method

1
Department of Physical Therapy, Faculty of Health Sciences, Tsukuba International University, 6-8-33 Manabe, Tsuchiura 300-0051, Japan
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Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami-machi, Inashiki 300-0394, Japan
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Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Inashiki 300-0394, Japan
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Department of Radiology, Shin-Oyama City Hospital, 2251-1 Hitotonoya, Oyama, Tochigi 323-0827, Japan
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Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami-machi, Inashiki 300-0394, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Ali Mobasheri
Medicina 2021, 57(6), 550; https://doi.org/10.3390/medicina57060550
Received: 10 May 2021 / Revised: 23 May 2021 / Accepted: 28 May 2021 / Published: 30 May 2021
Background and Objectives: Medial knee osteoarthritis is known to increase the mechanical load on the medial compartment of the knee joint during walking; however, it is not visually understood how much the mechanical load increases nor where in the medial compartment of the knee joint that load is focused. Therefore, we conducted a simulation study to determine the location and amount of the mechanical load in the medial compartment of the knee joint during the stance phase. Materials and Methods: Subject was a patient with right medial knee osteoarthritis. Computed tomography imaging and gait analysis were performed on subject. The CT image of the right knee was calculated using finite element analysis software. Since this software can set the flexion angle arbitrarily while maintaining the nonuniform material properties of the bone region, the model is constructed by matching the knee joint extension image obtained by CT to the loading response phase of gait analysis. The data of muscle exertion tension and vertical ground reaction force were inserted into the knee joint model created from the computed tomography-based finite element method, and the knee joint compressive stress was calculated. Results: With regard to compressive stress, the tibia showed high stress at 4.10 to 5.36 N/mm2. The femur showed high stress at 4.00 to 6.48 N/mm2. The joint compressive stress on the medial compartment of the knee joint was found to concentrate on the edge of the medial tibial condyle in the medial knee osteoarthritis subject. Conclusions: The measurement method of knee joint compressive stress by computed tomography-based finite element method can visually be a reliable method of measuring joint compressive stress in the medial knee osteoarthritis. This reflects the clinical findings because concentration of stress on the medial knee joint was observed at the medial osteophyte. View Full-Text
Keywords: knee osteoarthritis; finite element method; musculoskeletal model; compressive stress distribution; ground reaction force knee osteoarthritis; finite element method; musculoskeletal model; compressive stress distribution; ground reaction force
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MDPI and ACS Style

Fukaya, T.; Mutsuzaki, H.; Aoyama, T.; Watanabe, K.; Mori, K. A Simulation Case Study of Knee Joint Compressive Stress during the Stance Phase in Severe Knee Osteoarthritis Using Finite Element Method. Medicina 2021, 57, 550. https://doi.org/10.3390/medicina57060550

AMA Style

Fukaya T, Mutsuzaki H, Aoyama T, Watanabe K, Mori K. A Simulation Case Study of Knee Joint Compressive Stress during the Stance Phase in Severe Knee Osteoarthritis Using Finite Element Method. Medicina. 2021; 57(6):550. https://doi.org/10.3390/medicina57060550

Chicago/Turabian Style

Fukaya, Takashi, Hirotaka Mutsuzaki, Toshiyuki Aoyama, Kunihiro Watanabe, and Koichi Mori. 2021. "A Simulation Case Study of Knee Joint Compressive Stress during the Stance Phase in Severe Knee Osteoarthritis Using Finite Element Method" Medicina 57, no. 6: 550. https://doi.org/10.3390/medicina57060550

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