Comparative Analysis of the Stresses in the «Bone — Implant» System during Radial Head Arthroplasty with Different Implants

S.S. Strafun, I.V. Boiko, V.B. Makarov, D.Ye. Scherbakov, O.S. Radzhabov, A.S. Strafun

Abstract


In order to determine the characteristics of the stress distribution in the «bone — implant» system, as well as the of the contact of the articular surfaces in the elbow joint after radial head replacement using implant with «floating» head, there was created a geometric model of the elbow joint and various models of radial head prosthesis. Based on the finite element model, a quantitative experiment has been carried out. It was found that the nature of the movements of head endoprosthesis developed by authors in all cases shows a tendency to decrease in the distance between the contact joint surfaces. The absence of torques that put the system out of ba­lance has been detected. The maximum stress in the contact areas doesn’t exceed 3 MPa, indicating a decrease of load when using the developed endoprosthesis.


Keywords


radial head; radial head prosthesis; «floating» head; stress-strain state; finite-element mesh

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DOI: https://doi.org/10.22141/1608-1706.3.16.2015.80203

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