ABM/P-15 Bone Graft vs Traditional Bone Graft in Adult Spinal Deformity Surgery

RCT (single blinded) where the patients will be randomized into two groups. One group receiving the standard bone graft which is a mix of locally autologous harvested bone and a morselized femoral head (allogenic) and the other group will receive bone graft of anorganic bovine bone mineral coated with a bioactive peptide (ABM/P-15).