Patient-Individual Hip Cups: Simulation-Based Design and Sheet Metal Forming Manufacturing

Abstract

The revision of an hip prosthesis can have diffrent reasons. One frequent cause, especialley after implantation of a conventional cup, is the so called stress-shielding ef- fect which can lead to a migration or loosening. Patient- specific hip cups can be used to counteract this. However, individual hip cups are only implanted for the treatment of great deformations or tumours because of the cost-intensive manufacturing. Within this project a patient-specific hip cup prosthesis has to be developed and manufactured. Be- sides the numerical design by means of a coupling between multi-body simulation (MBS) and finite element method (FEM), an inovative concept for the production of patient- individual hip prosthesis out of titanium sheets is introduced in this study. Patient-individual hip cups, bone remodelling, reverse en- gineering, process planning, sheet metal forming