A balloon catheter tube assembly having an outer catheter tube and a concentric inner catheter onto which a generally wedge shaped balloon is attached. The catheter assembly is inserted into a damaged and compressed vertebra. Upon entry, the generally wedge shaped balloon is inflated to create a generally wedge shaped cavity. To create an optimum cavity, the inner catheter is connected to the generally wedge shaped balloon at a favorable position on either the toe or heel of the generally wedge shaped balloon. After the generally wedge shaped cavity is created, the generally wedge shaped balloon is removed and the generally wedge shaped cavity is filled with bone cement.
