Universiti Teknologi Malaysia Institutional Repository

Interface Micromotion Failure Simulation of Cementless Hip Prosthesis

Abdul Kadir, Mohammed Rafiq and Kamsah, Nazri and Tamin, Mohd. Nasir and Lee, Faisal Abidin (2007) Interface Micromotion Failure Simulation of Cementless Hip Prosthesis. Project Report. Faculty of Mechanical Engineering, Skudai, Johor. (Unpublished)

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Abstract

The most commonly reported failure modes of cementless hip stems are loosening and thigh pain; both are attributed to the relative motion at the bone-implant interface due to failure to achieve sufficient primary fixation. Accurate predictions of hip stems’ stability are therefore crucial to the pre-clinical analyses of hip arthroplasty. This study uses finite element technique to analyse the effect of muscle forces on the predicted micromotion and therefore stability of cementless femoral components. An in-house experimentally validated micromotion algorithm was used in analyses simulating two of the most common physiological activities – walking and stair-climbing. The results showed that models where muscle loads were included had ten times larger micromotion than those modelled without muscle loads. Ignoring muscle forces in any pre-clinical evaluation of femoral stems are therefore not advisable as it will overestimate the stability of the stem.

Item Type:Monograph (Project Report)
Uncontrolled Keywords:Hip arthroplasty, Cementless stem, Finite element, Muscle loadings, Primary stability Interface micromotion
Subjects:T Technology > T Technology (General)
Divisions:Mechanical Engineering
ID Code:5854
Deposited By: Noor Aklima Harun
Deposited On:03 Jul 2008 09:05
Last Modified:01 Jun 2010 15:35

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