Patent ID: 7875035

Claim:
A system for treating bone comprising a first tool establishing a percutaneous access path to a bone structure having cortical bone enclosing a cancellous bone volume, a second tool comprising a structure having a distal end and being sized and configured to be inserted into the bone structure through the percutaneous access path, a mechanism coupled to the structure operable (i) to move the structure to a wrapped condition prior to passage and withdrawal of the structure through the percutaneous access path, and (ii) to expand the structure to an expanded condition to form a cavity in the cancellous bone volume, the mechanism comprising a catheter member extending through the structure and having a distal end anchored to the distal end of the structure, and a stylet extending through the catheter member and having a distal end fixedly and nonremovably secured to the distal end of the catheter member, the stylet being twistable to selectively wrap the structure onto, and unwrap the structure from, the catheter member, and a third tool to convey a filler material into the cavity.