Effect of the material's stiffness on stress-shielding in osseointegrated implants for boneanchored prostheses: a numerical analysis and initial benchmark data

Piotr Prochor; Laurent Frossard; Sajewicz Eugeniusz

doi:10.37190/ABB-01543-2020-02

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Effect of the material's stiffness on stress-shielding in osseointegrated implants for boneanchored prostheses: a numerical analysis and initial benchmark data

Journal article

Peer reviewed

Effect of the material's stiffness on stress-shielding in osseointegrated implants for boneanchored prostheses: a numerical analysis and initial benchmark data

Piotr Prochor, Laurent Frossard and Sajewicz Eugeniusz

Acta of Bioengineering & Biomechanics, Vol.22(2), pp.1-24

2020

DOI: https://doi.org/10.37190/ABB-01543-2020-02

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Abstract

Biomedical Engineering

Clinical Sciences

Human Movement and Sports Science

bone mass

bone remodelling

boneanchored prosthesis

osseointegration

Young's modulus

Purpose: This study attempted to establish the link between design of implants for boneanchored prostheses and stress-shielding, affecting the stability of the bone-implant coupling using numerical approach. The objectives were to share a numerical model capable to evaluate the long-term stability of implants and to use this model to extract datasets showing how shape and material stiffness of threaded, press-fit and modular press-fit implants affect stress-shielding intensity. Methods: We considered three designs: threaded, press-fit and modular press-fit. The effect of shape and material stiffness of each design on stress-shielding intensity was assessed using Young's modulus (10 GPa to 210 GPa). Furthermore, the impact of the diameter of percutaneous part (10 mm to 18 mm) and thickness of medullar part (5 mm to 1 mm) was investigated for the modular press-fit implant. Results: The threaded design generated 4% more bone mass loss at the distal femur but an overall loss of bone mass 5% lower to press-fit design. The influence of Young's modulus on bone mass changes was noticeable for modular press-fit implant, depending on diameter of percutaneous or medullary part. A 20 GPa change of stiffness caused a bone mass change from 0.65% up to 2.45% and 0.07% up to 0.32% for percutaneous parts with 18 mm and 10 mm diameter, respectively. Conclusions: Results suggested that threaded implant provides greater stability despite an increased bone loss at the distal femur. Altogether, this work provided an initial model that could be applied in subsequent studies on the long-term stability of current and upcoming implants.

Details

Title: Effect of the material's stiffness on stress-shielding in osseointegrated implants for boneanchored prostheses: a numerical analysis and initial benchmark data
Authors: Piotr Prochor (Author) - Bialystok University of Technology, Poland
Laurent Frossard (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Sajewicz Eugeniusz (Author) - Bialystok University of Technology, Poland
Publication details: Acta of Bioengineering & Biomechanics, Vol.22(2), pp.1-24
Publisher: Politechnika Wroclawska - Oficyna Wydawnicza
Date published: 2020
DOI: 10.37190/ABB-01543-2020-02
ISSN: 1509-409X
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy
Language: English
Record Identifier: 99450835302621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Biophysics; Engineering, Biomedical

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