Optimizing bio-implant design: Reducing material waste with topology optimization techniques

In recent years, there has been a growing interest in the topology optimization of functionally graded microstructures and patient-specific orthopedic implants, with a focus on material efficiency and waste reduction. Functionally graded microstructures, characterized by varying volume fractions, often face challenges in connectivity and limited configurations when optimized traditionally. To address this, we introduce differentiable microstructures with continuous variations in geometry and mechanical properties, optimized using a novel topology optimization formulation that maximizes bulk modulus through non-uniform transformations, significantly enhancing performance while reducing material waste by 25%. Similarly, patient-specific orthopedic plates, crucial for bone fixation post-osteotomy, benefit from topology optimization (TO) over conventional CAD methods. Our study on 3D-printed plates exhibits higher ultimate load, better stress distribution, and improved durability, as validated by experimental and finite element analyses. These findings demonstrate TO’s superiority in creating durable, anatomically conforming implants, reducing screw and plate failure risks, and potentially enhancing surgical outcomes and recovery times by minimizing plate and incision sizes. This research highlights the dual application of TO in developing advanced materials and biomedical devices, offering significant improvements in both structural integrity and patient-specific medical solutions while effectively controlling material wastage.