A Micromechanical Approach to the Fracture of Femoral Bone during Total Hip Arthroplasty: A Threshold for the Maximum Allowable Press-Fit

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Malekmotiei, Leila | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42682 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Mohammadi Shoja, Hossein
Abstract:
The principle of micromechanics has been used to determine the maximum allowable press-fit for the hip stem during total hip arthroplasty. A 2D parametric solution has been presented. Bone and stem cross sections are modeled parametrically with respect to their geometry and mechanical properties. Surrounding soft tissue is also modeled and all the participating materials are considered as linear isotropic. Drucker-Prager fracture criterion is used to interpret the fracture phenomenon which is considered as both strain- and stress-state fracture. Considering presence of a thin layer of cancellous bone in the model caused a significant increase in results in comparison with previous numerical approaches to allowable press-fit
Keywords:
Refraction ; Artificial Hip Prosthesis ; Press-Fit ; Total Hip Arthroplasty ; Micromotion