Abstract
In this study a new generation of total hip pros-thesis is analysed numerically. The finite element method is used to analyze the distribution stresses on the hip pros-thesis components (stem, cement mantle and bone). The static load analysis is used by selecting the peak load dur-ing the normal walking activity. The loading conditions of Bergman et al were implemented in the finite element model to compute the dynamic stresses under normal walking, climbing up stairs and down stairs loading. The obtained results showed that the new models of hip pros-thesis weaker shear stresses in the cement mantle com-pared to the conventional models. In addition, the case of down stairs loading leads to higher shear stresses in the cement mantle. DOI: http://dx.doi.org/10.5755/j01.mech.20.5.5372
Highlights
Lifetime of orthopedic implants is a health issue because of people ageing. 800,000 hip prostheses are implanted in Europe and the same order of magnitude in USA
The objective of this study is the analysis of the mechanical behavior of new generation of hip total arthroplasty (HTA) by the computation of the stress distribution in the cement mantle
This distribution can give a precise idea on the loosening of the prosthesis and the fatigue life of the HTA can be predicted
Summary
Lifetime of orthopedic implants is a health issue because of people ageing. 800,000 hip prostheses are implanted in Europe and the same order of magnitude in USA. Sir John Charnley was the first surgeon who fixed a femoral stem with a bone cement based on polymethylmethacrylate composition [1]. It is an important tool used in the design and analysis of total joint replacements and other orthopedic devices. Finite element modeling and analysis present a non-destructive design approach for bone–implant hip prosthesis. It allows many complex what-if scenarios to be studied in computer environment before the prosthesis is applied on the patient. This will save time for the design and prevent any permanent damage caused by misimplementation of bone–implant hip prosthesis
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