Patent ID: 8480678

Claim:
A method of using beads to create a cavity in a bone comprising the following steps: a) introducing beads into a bone by applying a pressure on said beads, wherein said beads are metallic beads able to be attracted by a magnet; and b) withdrawing said beads from said bone by magnetic force, wherein said introduction of beads in step a) comprises inserting one end of a tube into said bone; feeding said beads into said tube; and pushing said beads inside said tube from another end of said tube; and said withdraw of said beads in step b) comprises b1) inserting a magnet into said tube from said another end to approach said beads in said bone; b2) retreating said magnet to which said beads are attached from said bone; and b3) repeating said inserting in step b1) and said retreating in step b2) in sequence until all the beads are withdrawn from said bone.