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- Title
Finite Element Analysis and Comparative Study on Stresses Induced on UHMWPE Acetabular Cup Surface of the Artificial Hip Implant During Free Walking and Walking While Carrying Weights.
- Authors
Atreya, Vibhor; Agarwal, Pradyumn
- Abstract
Osteoarthritis of the hip joint is a common problem for many people after middle age. Factors that may contribute include genetic defects in cartilage, increasing age, being overweight or being involved in intensive weight bearing activities which cause excessive wear and tear of the hip joint. A common solution to this problem is Total Hip Replacement (THR). Loosening of THR is caused by removal of implant material in the form of volume wear over a period of implant usage. Artificial UHMWPE acetabular cup surface fatigue results in volume wear and the fatigue process is influenced by surface stress levels. Present study compares the contact stresses induced on UHMWPE cup surface in a patient having THR for two different cases, first is free walking and second is walking with 10 Kg weights in both hands. A 3D finite element modelling and subsequent analysis has been performed to compare maximum Von Mises stresses in both the cases. There is 30% increase in maximum stress from first case to the second case. Similar analysis can be carried out for other routine activities. Such studies will help in classification of activities as high/low impact and also in preparing better action plans for patients. Better customised prosthesis can be made by similar comparative studies and by knowing patient's working patterns.
- Publication
Trends in Biomaterials & Artificial Organs, 2013, Vol 27, Issue 2, p62
- ISSN
0971-1198
- Publication type
Academic Journal