This presentation discusses the different biomaterials used in spinal fusion surgery, including autograft, allograft, bioactive glass, bone morphogenetic protein, demineralized bone matrix, hydroxyapatite, and calcium phosphate. It explores the advantages, disadvantages, and costs of each biomaterial and compares their cost-effectiveness. The presentation also includes information on the market value of tricalcium phosphate and the cost of bone morphogenetic protein.