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The comparison of stress and strain between custom-designed bone plates (CDBP) and locking compression plate (LCP) for distal femur fracture

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European Journal of Orthopaedic Surgery & Traumatology Aims and scope Submit manuscript

Abstract

Background

Distal femur fracture is considered one of the most common fractures due to high-energy traumas such as car accidents or low-energy traumas such as osteoporosis. Locking plates are orthopedic implants used for stabilized femur fracture. Thus, designing a bone plate fitted exactly with the patient’s bone and correctly fixing bone segments are required for better fracture healing.

Objectives

This study aims to design a bone plate based on anthropometric characteristics of patients’ femurs and compare performing custom-designed bone plates (CDBP) with the locking compression plate (LCP) by finite element method.

Materials and methods

In this analytical study, a 3D model of four patients' femur and CDBP were firstly designed in MIMICS 19.0 based on the patient’s femur anatomy. After designing the bone plate, the CDBPs and LCP were fixed on the bone and analyzed by finite element method (FEM) in ANSYS, and stress and strain of bone plates were also compared.

Results

The maximum principal stress for all 3D models of patients’ fracture femur by CDBPs was stabilized better than LCP with a decrease by 39.79, 12.54, 9.49, and 20.29% in 4 models, respectively. Also, in all models, the strain of CDBPs is less than LCP. Among the different thicknesses considered, the bone plate with 5 mm thickness showed better stress and strain distribution than other thicknesses.

Conclusion

Customized bone plate designed based on patient’s femur anatomical morphology shows better bone-matching plate, resulting in increasing the quality of the fracture healing and fails to any need for additional shaping.

Trial registration number

Design and analysis of an implant were investigated in this study. There was no intervention in the diagnosis and treatment of patients and the study was not a clinical trial.

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Acknowledgements

This paper has been extracted from S.F. Shams’s MSc thesis supported by the Research Council of Shiraz University of Medical Sciences (21051).

Author information

Authors and Affiliations

  1. Department of Medical Physics and Biomedical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran

    Seyedeh Fatemeh Shams

  2. Ionizing and Non-Ionizing Radiation Protection Research Center (INIRPRC), School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran

    Alireza Mehdizadeh

  3. Department of Medical Physics and Biomedical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran

    Mohammad Mehdi Movahedi

  4. Trauma Research Center, Shahid Rajaee (Emtiaz) Trauma Hospital, Shiraz University of Medical Sciences, Shiraz, Iran

    Shahram Paydar

  5. Department of Solid Mechanics, School of Mechanical Engineering, Shiraz University, Shiraz, Iran

    Seyyed Arash Haghpanah

Authors
  1. Seyedeh Fatemeh Shams
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  2. Alireza Mehdizadeh
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  3. Mohammad Mehdi Movahedi
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  4. Shahram Paydar
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  5. Seyyed Arash Haghpanah
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Correspondence to Alireza Mehdizadeh.

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The author declares there is no conflict of interest.

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The study was approved by the Communication of the Decision of the Institutional Ethics Committee of Shiraz University of Medical Sciences (Registration No. IR.SUMS.REC.1398.939).

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Shams, S.F., Mehdizadeh, A., Movahedi, M.M. et al. The comparison of stress and strain between custom-designed bone plates (CDBP) and locking compression plate (LCP) for distal femur fracture. Eur J Orthop Surg Traumatol 33, 191–197 (2023). https://doi.org/10.1007/s00590-021-03160-4

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  • DOI: https://doi.org/10.1007/s00590-021-03160-4

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