Modeling and simulation of a porous mobility total ankle arthroplasty implant: enhancing bone-in growth and reducing micromotion for improved fixation

Porosity enhanced mechanical stimulus to the surrounding cancellous bone and may support improved long-term osseointegration by reducing stress shielding; however, it also produced substantially higher micromotion and contact pressure, indicating compromised primary stability. The localized stress peaks around pore regions highlight the need for balanced implant stiffness and optimized pore architecture to prevent early instability while still promoting bone ingrowth.