Bone morphogenetic protein 2 is shown to stimulate the production of bone.Recombinant human protein (rhBMP-2) is currently available for orthopaedic usage in the United States. Implantation of BMP-2 is performed using a variety of biomaterial carriers ("metals, ceramics, polymers, and composites") and delivery systems ("hydrogel, microsphere, nanoparticles, and fibers"). While used primarily in orthopedic procedures such as spinal fusion, BMP-2 has also found its way into the field of dentistry.
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. 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.
A study published in 2011 noted "reports of frequent and occasionally catastrophic complications associated with use of [BMP-2] in spinal fusion surgeries", with a level of risk far in excess of estimates reported in earlier studies. 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."
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^ abcAgrawal, V; Sinha, M. (2016). "A review on carrier systems for bone morphogenetic protein-2". Journal of Biomedical Materials Research Part B: Applied Biomaterials. Early View. doi:10.1002/jbm.b.33599. PMID26728994.
^ abBurkus JK, Gornet MF, Schuler TC, Kleeman TJ, Zdeblick TA (May 2009). "Six-year outcomes of anterior lumbar interbody arthrodesis with use of interbody fusion cages and recombinant human bone morphogenetic protein-2". J Bone Joint Surg Am91 (5): 1181–9. doi:10.2106/JBJS.G.01485. PMID19411467.
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^Schlegel KA, Thorwarth M, Plesinac A, Wiltfang J, Rupprecht S (December 2006). "Expression of bone matrix proteins during the osseus healing of topical conditioned implants: an experimental study". Clin Oral Implants Res17 (6): 666–72. doi:10.1111/j.1600-0501.2006.01214.x. PMID17092225.
^Schliephake H, Aref A, Scharnweber D, Bierbaum S, Roessler S, Sewing A (October 2005). "Effect of immobilized bone morphogenic protein 2 coating of titanium implants on peri-implant bone formation". Clin Oral Implants Res16 (5): 563–9. doi:10.1111/j.1600-0501.2005.01143.x. PMID16164462.
Nickel J, Dreyer MK, Kirsch T, Sebald W (2001). "The crystal structure of the BMP-2:BMPR-IA complex and the generation of BMP-2 antagonists". J Bone Joint Surg Am. 83-A Suppl 1 (Pt 1): S7–14. PMID11263668.