Patent ID: 9114011
Filing Date: 2015-08-25
Classification: A61F,A61L,C04B

Abstract:
1. A method for fabricating an artificial bone by multi-pass extrusion, comprising: preparing a calcium phosphate shell, a calcium phosphate-(t-ZrO2) shell, and a t-ZrO2 shell by a warm pressing process; extruding the calcium phosphate/calcium phosphate-(t-ZrO2)/t-ZrO2 shells forming roll-shaped filaments as first extruded filaments, wherein each shell of the first extruded filaments is arranged in the order of calcium phosphate, calcium phosphate-(t-ZrO arranging the first extruded filaments circularly surrounding carbon filaments; extruding the roll-shaped and the carbon filaments as second extruded filaments; arranging an external shell of hydroxyapatite (HAp) surround the second extruded filaments and extruding the same as third extruded filaments, wherein the external shell of hydroxyapatite (HAp) is prepared by the warm pressing process; removing binder from the third extruded filaments by burning the third extruded filaments at 600-800° C.; removing carbon from the carbon filaments by burning the third extruded filaments at 900-1100° C.; and increasing a density of the third extruded filaments by sintering the third extruded filaments at 1350-1600° C.