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

Jonathan Pitocchi, Mariska Wesseling, Gerrit Harry van Lenthe and María Angeles Pérez
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Jonathan Pitocchi: Materialise NV, 3001 Leuven, Belgium
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

Mathematics, 2020, vol. 8, issue 7, 1-13

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.

Keywords: finite element analysis; shoulder implant stability; implant design; reverse shoulder arthroplasty; micromotion (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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