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Open AccessArticle

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

1
Materialise NV, 3001 Leuven, Belgium
2
Biomechanics Section, KU Leuven, 3001 Leuven, Belgium
3
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
*
Author to whom correspondence should be addressed.
Mathematics 2020, 8(7), 1113; https://doi.org/10.3390/math8071113
Received: 26 May 2020 / Revised: 29 June 2020 / Accepted: 3 July 2020 / Published: 6 July 2020
(This article belongs to the Special Issue Numerical Simulation in Biomechanics and Biomedical Engineering)
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. View Full-Text
Keywords: finite element analysis; shoulder implant stability; implant design; reverse shoulder arthroplasty; micromotion finite element analysis; shoulder implant stability; implant design; reverse shoulder arthroplasty; micromotion
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MDPI and ACS Style

Pitocchi, J.; Wesseling, M.; van Lenthe, G.H.; Pérez, M.A. Finite Element Analysis of Custom Shoulder Implants Provides Accurate Prediction of Initial Stability. Mathematics 2020, 8, 1113. https://doi.org/10.3390/math8071113

AMA Style

Pitocchi J, Wesseling M, van Lenthe GH, Pérez MA. Finite Element Analysis of Custom Shoulder Implants Provides Accurate Prediction of Initial Stability. Mathematics. 2020; 8(7):1113. https://doi.org/10.3390/math8071113

Chicago/Turabian Style

Pitocchi, Jonathan; Wesseling, Mariska; van Lenthe, Gerrit H.; Pérez, María A. 2020. "Finite Element Analysis of Custom Shoulder Implants Provides Accurate Prediction of Initial Stability" Mathematics 8, no. 7: 1113. https://doi.org/10.3390/math8071113

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