“…Posterolateral intertransverse process fusion is a commonly performed procedure in the lumbar spine; however, the incidence of failure to achieve fusion has ranged from 5% to 45% in large series because of inadequate new bone mass caused by the limited mass of graft bone or poor surgical technique 5,10,41,46) . Although autogenous bone graft is the gold Standard for spinal fusion, there is a limit to its mass and complications are associated with bone harvest in as many as 20% of the patients, even in the hands of experienced surgeons 8,19,20,37,38) . In recent years, a variety of materials have been developed as alternatives to autogenous bone graft to avoid their disadvantages.…”