Numerical evaluation of bone remodelling associated with trans-femoral osseointegration implant--A 68 month follow-up study

Journal of Biomechanics
D H XuW Xu

Abstract

Osseointegrated trans-femoral implant is a relatively new orthopaedic anchoring method for connecting a stump with a prosthesis. Through a follow-up study of a patient over six years, significant bone remodelling has been observed. Finite element (FE) simulations were carried out to investigate the relationship between the bone remodelling and the strain re-distribution around the trans-femoral osseointegrated implant system. An initial FE model representing the original status of the femur-implant assembly was created from CT scans of the subject prior to osseointegration. Follow-up X-ray images were acquired at various stages post-surgery, which allowed the changes in bone wall thickness to be measured. By updating the bone thickness in the initial model, a series of follow-up FE models were created. Representative load associated with the subject's body weight was applied to the models, and the strain re-distributions were calculated. The results showed that in order to minimise the adverse effect of bone remodelling, an osseointegration implant made by functionally gradient materials are preferred over homogeneous materials.

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Citations

Mar 8, 2017·JBI Database of Systematic Reviews and Implementation Reports·Sofie VertriestLaurent Frossard
Jan 20, 2018·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Piotr Prochor, Eugeniusz Sajewicz
Jun 13, 2018·JBI Database of Systematic Reviews and Implementation Reports·Shanthan PatherLaurent Frossard
Mar 20, 2021·Journal of the Mechanical Behavior of Biomedical Materials·Armin Omidvar GhazianiSara Kowsar
Nov 11, 2019·ACS Biomaterials Science & Engineering·Qing HanJincheng Wang

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