The present invention broadly comprises an assembly for performing a gradual lateral spinal alignment of a spine. The assembly includes an inflatable bone anchor that includes an inflatable balloon, a hollow tube attached to the balloon and attached to an external support, such as a brace. The inflatable balloon extends into or through a vertebra of the misaligned spine and deployed. The inflatable balloon is pulled using the vertebra and attached to the brace to pull the spine into alignment. The device allows the spine to be gradually placed into alignment helping to avoid trauma on the spine and surrounding tissue.