Subjects who are scheduled for an elective spinal fusion and are enrolled in the study will be assigned to receive either BMP or BMAC. Subjects will be asked to complete questionnaires relating to quality of life, use of pain killers, and overall health, as well as have standard radiographic studies to examine the spine pre- and post-surgically. Subjects will attend 7 visits, which happen at the same time as the standard of care visits they would normally attend for their condition. Subjects will be followed in the study for 2 years in total.