Like many other proteins from the BMP family, BMP-2 has been demonstrated to potently induce osteoblast differentiation in a variety of cell types.
[16] Implantation of BMP-2 is performed using a variety of biomaterial carriers ("metals, ceramics, polymers, and composites"[17]) and delivery systems ("hydrogel, microsphere, nanoparticles, and fibers"[17]).
[20][21][22] The use of dual tapered threaded fusion cages and recombinant human bone morphogenetic protein-2 on an absorbable collagen sponge obtained and maintained intervertebral spinal fusion, improved clinical outcomes, and reduced pain after anterior lumbar interbody arthrodesis in patients with degenerative lumbar disc disease.
[18] As an adjuvant to allograft bone or as a replacement for harvested autograft, bone morphogenetic proteins (BMPs) appear to improve fusion rates after spinal arthrodesis in both animal models and humans, while reducing the donor-site morbidity previously associated with such procedures.
[23][24] An additional review by Agrawal and Sinha of BMP-2 and its common delivery systems in early 2016 showed how "problems like ectopic growth, lesser protein delivery, [and] inactivation of the protein" reveal a further need "to modify the available carrier systems as well as explore other biomaterials with desired properties.