Effects of the bone-plate material and the presence of a gap between the fractured bone and plate on the predicted stresses at the fractured bone

Medical Engineering & Physics
H Fouad

Abstract

In the present study, 3D finite element models for fractured bones with function-graded (FG) bone-plates and traditional bone-plates made of stainless steel (SS) or titanium (Ti) alloy are generated using the ABAOUS code. The predicted Von Mises stresses at the fracture site and underlying bone-plate are examined at different healing stages. The effects on the predicted Von Mises stresses at the fracture site of the presence of a gap between the plate and fractured bone are also studied. Based on the analytical results, it is found that the stress shielding at the fracture site at the fully healed stages decreases when using FG bone-plates compared to Ti alloy or SS bone-plates. In the initial healing stages, the Von Mises stresses at the fracture site increase (stress shielding decreases) by 17% and 11% when using FG bone-plates as compared to SS bone-plates for contacted and non-contacted bone-plate system, respectively. The significant effects of using an FG bone-plate with a gap on the resultant Von Mises stresses on the bone underneath the plate and on the bone stress shielding should be taken into consideration during fractured bone fixation.

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Citations

Sep 16, 2011·Journal of Materials Science. Materials in Medicine·Erkin AydinVasif Hasirci
Jan 3, 2013·International Journal for Numerical Methods in Biomedical Engineering·Pankaj Pankaj
Jun 27, 2014·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Sung Yoon ChoiYoung Bin Choy
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Dec 9, 2017·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Xunjian FanYinghu Peng
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Mar 12, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hisao Taira, Hiroyuki Shima
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Jun 3, 2018·Biomechanics and Modeling in Mechanobiology·Marzieh OvesyPhilippe Zysset
Nov 10, 2020·Computer Methods in Biomechanics and Biomedical Engineering·Moeinoddin Mahmoudi, Hossein Mahbadi
Jan 12, 2021·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Yousof MohandesMohammad Tahami
Nov 17, 2020·Journal of Clinical Orthopaedics and Trauma·Ramesh K SenNeha Raman

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