Abstract
Ordered tubular structures with open porosity were created by microextrusion freeforming of tubular latticework. The extrudate was a suspension of fine hydroxyapatite powder in isopropyl alcohol with a polyvinyl butyral binder. The extruder consisted of a stepper driven syringe fitted with a miniature tube extrusion die. The lattices were sintered at 1250°C to produce a ceramic which has potential as a bone scaffold that could accommodate growth promoters for slow release.
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