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Life Prediction of Modular Hip Implants : Mechanistic Insights and Avenues for Enhancement| old_uid | 7540 |
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| title | Life Prediction of Modular Hip Implants : Mechanistic Insights and Avenues for Enhancement |
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| start_date | 2009/11/05 |
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| schedule | 13h45 |
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| online | no |
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| summary | Fretting corrosion of orthopedic implants is an insidious problem and has been limiting the useful life of the implants. This investigation examines the stress effects on nano-scale surface damage and dissolution of wrought titanium and cobalt chromium alloys in passivating and corrosive environments. Experimental results indicate that dissolution rate increases with increase in contact loads. Dissolution rates displayed a complex dependence on residual stresses and environment. In the ambient environment, surface damage rates are independent of surface stress states. In an acidic aqueous environment, dissolution rates demonstrate a quadratic dependence on the surface stress state.
Mechanistic modeling is utilized to make life predictions of modular hip-implant assemblies, and avenues for life enhancement will be discussed. |
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| responsibles | Fenouil |
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