<qa>  How many groups will you be assigned to?If you are one of the next 60 patients to be enrolled, you will be enrolled in Phase 2. You will be randomly assigned as in the toss of dice to 1 of 4 groups. Phase 2 Group 1 will receive vertebroplasty, and Phase 2 Group 2 will receive vertebroplasty with the Cavity SpineWand. Phase 2 Group 3 will receive kyphoplasty, and Phase 2 Group 4 will receive kyphoplasty with the Cavity SpineWand. 