Inflatable device for use in surgical protocol relating to fixation of bone

A method comprising

• providing a system comprising a void creation device capable of being inserted through a percutaneous access path into a bone having cortical walls which enclose a cancellous bone volume, the void creation device including an expandable structure and including a first expandable region capable of expanding in the cancellous bone volume to compact a first region of the cancellous bone volume to form a first void, and a second expandable region spaced from the first expandable region and capable of expanding in the cancellous bone volume substantially independently of the first expandable region to compact a second region of the cancellous bone volume different than the first region of the cancellous bone volume to form a second void, and an expansion controller coupled to the expandable structure being capable of selective operation in a first condition to expand the first expandable region without substantially expanding the second expandable region and in a second condition to expand the second expandable region without substantially expanding the first expandable region,
• inserting the void creation device into a bone through a percutaneous access path, and
• operating the expansion controller to form at least one void in cancellous bone within the bone.