Patent ID: 7175629

Claim:
An extractable device for inserting a medicinal filling into a vertebral body, said device comprising: a filling member comprising a flexible wall and provided with a holding portion, an injection port at one end of the holding portion, and an opening at another, releasably closable, opening end of the holding portion; one or more thread, each having one end for releasably closing said opening end of said holding portion in such a manner that said opening end is leakproof; and a pasty medicine to be injected into said holding portion via said injection port of said filling member in the wake of a process for inserting said filling member into the vertebral body whereby said pasty medicine solidifies in said holding portion of said filling member; said opening end of said holding portion being reopened at the time when other end of said threads is pulled by an external force, thereby enabling said filling member to be extracted from the vertebral body so as to leave only said medicine in the vertebral body, wherein said holding portion of said filling member is inflatable and is substantially tabular after being inflated, wherein cross sections perpendicular to a longitudinal axis of the holding portion are substantially elliptical and have increasing areas thereof along a direction from the injection port to the opening of the holding portion.