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Finite Element Analysis of Custom Shoulder Implants Provides Accurate Prediction of Initial Stability

Author

Listed:
  • Jonathan Pitocchi

    (Materialise NV, 3001 Leuven, Belgium
    Biomechanics Section, KU Leuven, 3001 Leuven, Belgium
    Multiscale in Mechanical and Biological Engineering, Instituto de Investigación en Ingeniería de Aragón (I3A), Instituto de Investigación Sanitaria Aragón (IIS Aragón), University of Zaragoza, 50018 Zaragoza, Spain)

  • Mariska Wesseling

    (Materialise NV, 3001 Leuven, Belgium)

  • Gerrit Harry van Lenthe

    (Biomechanics Section, KU Leuven, 3001 Leuven, Belgium)

  • María Angeles Pérez

    (Multiscale in Mechanical and Biological Engineering, Instituto de Investigación en Ingeniería de Aragón (I3A), Instituto de Investigación Sanitaria Aragón (IIS Aragón), University of Zaragoza, 50018 Zaragoza, Spain)

Abstract

Custom reverse shoulder implants represent a valuable solution for patients with large bone defects. Since each implant has unique patient-specific features, finite element (FE) analysis has the potential to guide the design process by virtually comparing the stability of multiple configurations without the need of a mechanical test. The aim of this study was to develop an automated virtual bench test to evaluate the initial stability of custom shoulder implants during the design phase, by simulating a fixation experiment as defined by ASTM F2028-14. Three-dimensional (3D) FE models were generated to simulate the stability test and the predictions were compared to experimental measurements. Good agreement was found between the baseplate displacement measured experimentally and determined from the FE analysis (Spearman’s rank test, p < 0.05, correlation coefficient ρs = 0.81). Interface micromotion analysis predicted good initial fixation (micromotion <150 µm, commonly used as bone ingrowth threshold). In conclusion, the finite element model presented in this study was able to replicate the mechanical condition of a standard test for a custom shoulder implants.

Suggested Citation

  • Jonathan Pitocchi & Mariska Wesseling & Gerrit Harry van Lenthe & María Angeles Pérez, 2020. "Finite Element Analysis of Custom Shoulder Implants Provides Accurate Prediction of Initial Stability," Mathematics, MDPI, vol. 8(7), pages 1-13, July.
    • Handle: RePEc:gam:jmathe:v:8:y:2020:i:7:p:1113-:d:380922
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    References listed on IDEAS

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    1. Jan Wieding & Robert Souffrant & Andreas Fritsche & Wolfram Mittelmeier & Rainer Bader, 2012. "Finite Element Analysis of Osteosynthesis Screw Fixation in the Bone Stock: An Appropriate Method for Automatic Screw Modelling," PLOS ONE, Public Library of Science, vol. 7(3), pages 1-10, March.
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    Cited by:

    1. Muhammad Sohail & Jaehyun Park & Jun Young Kim & Heung Soo Kim & Jaehun Lee, 2022. "Modified Whiteside’s Line-Based Transepicondylar Axis for Imageless Total Knee Arthroplasty," Mathematics, MDPI, vol. 10(19), pages 1-17, October.

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