Abdul Kadir, Mohammed Rafiq and Hansen, Ulrich N. (2007) The effect of physiological load configuration on interface micromotion in cementless femoral stems. Jurnal Mekanikal (23). pp. 50-61. ISSN 0127-3396
Official URL: http://jurnalmekanikal.fkm.utm.my/?id=Issue&pid=70...
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 stemsâ€™ 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 activitiesâ€“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.
|Uncontrolled Keywords:||hip arthroplasty, cementless stem, finite element, muscle loadings primary stability, interface micromotion|
|Subjects:||T Technology > TJ Mechanical engineering and machinery|
|Deposited By:||Norshiela Buyamin|
|Deposited On:||27 Mar 2009 07:36|
|Last Modified:||07 Dec 2012 08:50|
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