Graded-Porosity Lattice Implant & Stress Shielding

3D-printed orthopedic implants aren't printed solid — a porous lattice infill lets engineers tune the part's effective stiffness down toward bone's own, cutting the stress-shielding that drives aseptic loosening, while the open pore network gives bone cells room to grow in and osseointegrate. This simulator renders a titanium lattice rod inside a surrounding bone tube and applies the Gibson-Ashby cellular-solids power law (E*/Es = C·(ρ*/ρs)ⁿ) live: change the relative density, the unit-cell topology (cubic, diamond or octet-truss — each with a different bending-vs-stretch deformation mode and exponent n), the pore size, and the applied axial load, and watch the effective modulus, the fraction of load the surrounding bone actually carries, and the pore's osseointegration suitability score update together — along with the strut geometry and load-color of the 3D lattice itself.