Published Paper Details:

The prediction of the hip joint force is a fundamental factor for the prevention of edge loading in total hip arthroplasty. Naturally, the loading of the liner of the acetabular component depends on the HIP JOINT FORCE acting on the artificial joint. In contrast to dynamic musculoskeletal models, static models for HIP JOINT FORCE prediction do not require motion analysis of the patient. However,static models have to be scrutinized for patient-specific adaptability and validity . In this study, a modular framework for HIP JOINT FORCE prediction using static models is introduced to compare the results of different cadaver templates that are the basis of most static and dynamic models, and their different scaling laws for the patient specific adaptation one-leg stance and level walking. Using MATLAB and Three cadaver templates with varying levels of detail were integrated into the framework. A modular framework for HIP JOINT FORCE prediction using static models is introduced to compare the results of different cadaver templates that are the basis of most static and dynamic models, and different scaling laws for the patient-specific adaptation with in vivo HIP JOINT FORCE of ten patients for one-leg stance and level walking. The results revealed the significant effect of the underlying cadaver template used for the prediction of the HIP JOINT FORCE. Using the hypothesis that a more detailed patient-specific adaptation of the osseous morphology improves the prediction significantly could only be confirmed partially for one of the cadaver templates. There are Three cadaver templates with varying levels of detail were integrated into the framework. The Fick1850 cadaver template contains 19 hip muscles represented by 44 fascicles modeled as straight lines (Fick, 1850). The Dostal1981 cadaver template contains 27 hip muscles represented by 27 fascicles modeled as straight lines (Dostal and Andrews, 1981). The Fick1850 and Dostal1981 cadaver templates were considered in this study