Computer modeling of mechanical behavior of the Ilizarov apparatus modified by Bagirov

  • Authors: Lukina Y.S1,2, Bionyshev-Abramov L.L1, Sotin A.V3, Suvarly P.N4, Samborskij D.Y.1, Klokova A.N2, Bagirov A.B1,5,6
  • Affiliations:
    1. Priorov National Research Center of Traumatology and Orthopedics
    2. D. Mendeleev University of Chemical Technology of Russia
    3. Perm National Research Polytechnic University
    4. Scientific Medicine Clinic LLC
    5. Moscow Aviation Institute (State Technical University)
    6. International Medical Association – BRICS Health University
  • Issue: No 4 (2024)
  • Pages: 18–33
  • Section: ARTICLES
  • URL: https://ered.pstu.ru/index.php/amcs/article/view/4569
  • DOI: https://doi.org/10.15593/2499-9873/2024.4.02
  • Cite item

Abstract


The development of computer models of orthopedic products allows adding to the arsenal of a trauma surgeon a digital toolkit that allows to calculate the biomechanical consequences of the chosen tactics of reconstructive and restorative treatment. Thus, when using percutaneous osteosynthesis systems with the help of a digital twin of the external fixation apparatus, the operating specialist at the preoperative stage can assess the influence of the choice of the apparatus layout on the risk of possible separation of bone fragments.Clinical indications for the use of the Ilizarov apparatus of the Bagirov modification are fractures of diaphyses of the tibia bones, which account for up to 45 % of all fractures of long bones of the human skeleton. Fracture healing is accompanied by a large number of complications, so the problem of improving the results of treatment of patients with this injury is still relevant for modern traumatology and orthopedics. The use of external fixation devices makes it possible to ensure stable functional osteosynthesis and eliminate the need for plaster immobilization of the segment or limb in the postoperative period. The use of compression-distraction devices allows us to expand the potential use of external fixation devices to solve the problems of distraction osteogenesis. Biomechanical relationships in the bone-apparatus system are a significant factor that allows objectifying the apparatus layout and the mode of motor rehabilitation in the early postoperative period.Within the framework of this study, a mathematical model of the Ilizarov apparatus of the Bagirov modification was constructed and the stress-strain state of the apparatus components under model loads was calculated using the finite element method. To validate the computer model, a field experiment was conducted on a Walter+Bai AG LFM-5 universal testing machine. The investigated structure was subjected to axial compression with a load up to 1000 N. As a result of the comparative analysis of the resistance of the device to axial compression, it was found that the results of finite element calculations describe the experimental results with sufficient accuracy. Comparison of the calculation results with experimental data allows us to state that the proposed computer model correctly describes the mechanical behavior of the studied medical device and can be used in computational experiments to assess the functionality of various device layouts.

Full Text

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About the authors

Yu. S Lukina

Priorov National Research Center of Traumatology and Orthopedics; D. Mendeleev University of Chemical Technology of Russia

L. L Bionyshev-Abramov

Priorov National Research Center of Traumatology and Orthopedics

A. V Sotin

Perm National Research Polytechnic University

P. N Suvarly

Scientific Medicine Clinic LLC

D. Ya Samborskij

Priorov National Research Center of Traumatology and Orthopedics

A. N Klokova

D. Mendeleev University of Chemical Technology of Russia

A. B Bagirov

Priorov National Research Center of Traumatology and Orthopedics; Moscow Aviation Institute (State Technical University); International Medical Association – BRICS Health University

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