Methods and devices for treating bone after high velocity and/or trauma fracture

1. A method comprising:

inserting an insertion device percutaneously into a vertebral body having an interior volume occupied, at least in part, by cancellous bone;

inserting a cavity-forming device comprising an expandable body through the insertion device wholly into an area of cancellous bone in the vertebral body;

conveying an inflation medium into the expandable body, via a catheter having only a single lumen, to expand the expandable body and displace cancellous bone and create a cavity occupied at least in part by the expandable body and the inflation medium wholly within the vertebral body;

removing the inflation medium from the expandable body;

leaving the expandable body within the cavity wholly within the vertebral body; and

further comprising after removing the inflation medium from the expandable body re-conveying another inflation medium into the expandable body.

2. A method comprising:

inserting an insertion device percutaneously into a vertebral body having an interior volume occupied, at least in part, by cancellous bone;

inserting a cavity-forming device comprising of a single expandable body through the insertion device wholly into an area of cancellous bone in the vertebral body;

conveying an inflation medium into the single expandable body to expand the expandable body and displace cancellous bone and create a cavity occupied at least in part by the expandable body;

conveying the inflation medium into the cavity occupied at least in part by the single expandable body;

removing the inflation medium from the single expandable body;

leaving the single expandable body within the cavity wholly within the vertebral body; and

further comprising after removing the inflation medium from the single expandable body re-conveying another inflation medium into the single expandable body.