The Deformation of a SLM Porous Titanium printed Acetabular Implant

This study involved the suggestion of a SLM printed CP-Ti grade 1 mesh to be implemented in a Paprosky 3A defect during a revision THA surgery. In pursuing this design goal, BCC- and diamond lattices were included in mesh designs and analysed in their material response to uniaxial impact and uniaxial static compression. The potential of osseointegration was described also. The different designs varied in the appliance of lattice structure and length/thickness strut ratio. During all executions of experiments no disengaged struts were identified. Moreover, BCC based meshes showed promise in offering surgeons more flexibility during impactation of material. Furthermore, diamond designs with a ratio of 5 displayed significant lateral expansion through uniaxial static compression. However, other diamond based designs failed in establishing considerable lateral expansion due to low yield stresses establishing a fast collapse of material. BCC designed meshes containing a ratio of 10 and 15 provided considerate lateral expansion as well. Considering the potential of osseointegration, BCC derived meshes with a ratio of 15 and diamond derived meshes with a ratio of 10 and 15 provided elastic moduli and yield stresses comparable to surrounding bone tissue present in a Paprosky 3A defect. Resulting pore sizes after imapct and static compression were in accordance with the set requirements. However, diamond based designs showed most promise due to the resulting pore morphology and stochastic structure.