These are performed in cases of spinal fractures. When a vertebra fractures, it can put pressure on surrounding nerves which can cause intense pain and disability. The bones may be repaired with these procedures. In vertebroplasty, an acrylic cement is injected into a fractured and collapsed vertebra (spinal bone). The cement strengthens the bone and decreases pain from the fracture. In kyphoplasty, a balloon is used to create a cavity to inject the cement into. This procedure is designed to relieve pain and can also improve spinal deformities from the fractures.