 On the internal-facing side of the spine, ligaments (which can be too short, pulling the spine into its abnormal shape) must be surgically cut or released, not only stopping part of the cause of the kyphosis, but also allowing the titanium rods to pull the spine into a more natural position.The damaged discs between the troubled vertebrae (wedged vertebrae) are normally removed and replaced with bone grafting from the hip or other parts of the vertebrae, which once healed or "fused" will solidify.The titanium instrumentation holds everything in place during healing.