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Incorporation of interference fit and cyclic loading in simulation algorithm for better prediction of micromotion of femoral stems

Abdul-Kadir, Mohammed Rafiq and Hansen, Ulrich N. (2007) Incorporation of interference fit and cyclic loading in simulation algorithm for better prediction of micromotion of femoral stems. Jurnal Teknologi, 47 (A). pp. 19-34. ISSN 0127-9696

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Abstract

Aseptic loosening is one of the major causes for revision surgery in hip arthroplasty. This has been attributed to failure in achieving strong primary fixation. Interface micromotion beyond a certain threshold limit inhibits bone ingrowth and favours the formation of fibrous tissue. In this study, an algorithm was constructed to predict micromotion and therefore instability of femoral stems. Based on common physiological loading, micromotion is calculated throughout the bone-implant interface. Press fit stem insertion was modelled using interference fit and cyclic loading was used to better simulate actual loading configuration. An in-vitro micromotion experiment was carried out on four human cadaveric femurs to validate the micromotion algorithm. A good correlation was obtained between finite element predictions and the in-vitro micromotion experiment.

Item Type:Article
Additional Information:A (Pembuatan, Bahan Termaju, Tenaga & Pengangkutan)
Uncontrolled Keywords:hip arthroplasty, primary stability, micromotion algorithm, experimental validation, finite element
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:5718
Deposited By: Pn Norhayati Abu Ruddin
Deposited On:23 Jun 2008 00:31
Last Modified:29 Nov 2013 03:23

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