Parameter establishment for the design of interference fit tibial component of total knee replacement
Abstract
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Over 4.7 million Americans are living with total knee replacements with an additional one million receiving the surgery each year. With these numbers predicted to grow each year, there is a need for a more robust and effective prosthetic to improve patient results and reduce surgery costs. One aspect with potential for improvement is the fixture method; most prosthetics are cemented to the bone. This method is non-ideal because of the common failure mode of cement degradation as well as the increase in surgery time for cement curing. A novel interference fit implant is evaluated using finite-element processes to minimize micromotion. Bone anisotropy and patient geometry is incorporated into simulations using computed tomography (CT) data taken directly from patients. Design parameters, including interference degree, implantation depth, and prosthetic material, are established and examined using an orthogonal array for design of simulations. It is concluded that the most important design factor by far is the degree of interference, eclipsing the other design factors in the optimization criterion, micromotion.
Degree
M.S.
Thesis Department
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