Sintered Hydroxyapatite Latticework for Bone Substitute

Hydroxyapatite suspensions were extruded through a range of nozzles from 100 to 330 μm diameter from a stepper‐driven syringe. Regular latticework scaffolds were built by fused deposition modeling (FDM), a solid freeforming method, on a three‐axis table using 330 μm diameter filament. The scaffolds were sintered at 1250°C to 97% density retaining the hydroxyapatite crystal structure. The scaffolds were introduced to cultured human osteoblast cells and, after 48 h, the surfaces were thoroughly covered with active cells.