Geometric parameterisation of pelvic bone and cartilage in contact analysis of the natural hip: An initial study

In this study, a simple set of parameters to describe the geometries of acetabulum and cartilage in the hip were extracted from two segmentation-based models, which were then used to generate the parameterised finite element models for the two subjects. The contact pressure and contact area at the articular surface predicted from the parameterised finite element models were compared with the results from the segmentation-based models. The differences in the predicted results between the parameterised models and segmentation-based models were found to be within 11% across seven activities simulated. In addition, the parameterised models were able to replicate features of the contact pressure/area fluctuations over the loading cycle that differed between the two subjects. These results provide confidence that the parameterised approach could be used to generate representative finite element models of the human hip for contact analysis. Such a method has the potential to be used to systematically evaluate geometric features that can be captured from simple clinical measurements and provide a cost- and time-effective approach for stratification of the acetabular geometries in the patient population.

Source: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine - August 3, 2015 Category: Biomedical Engineering Authors: Hua, X., Li, J., Wilcox, R. K., Fisher, J., Jones, A. C. Tags: Original Articles Source Type: research