Growth Factor (BMP)

Bone morphogenetic proteins are naturally occurring growth factors that stimulate bone formation, and synthetic versions are used in some orthopaedic and spinal surgeries to help promote bone healing and fusion. They are typically applied directly at the surgical site during procedures such as spinal fusion or complex fracture repair. Their use is generally reserved for specific situations where extra support for bone healing is needed.

BMP works by stimulating specialised cells to differentiate into bone-forming cells, effectively kick-starting and accelerating the natural bone healing and fusion process. It is often used on a carrier material that holds it in place at the surgical site. This targeted local action is different from a systemic medication taken by mouth or injection elsewhere in the body.

BMP may be recommended for spinal fusion surgery, particularly in cases where bone healing is expected to be more challenging, such as in smokers, people with osteoporosis, or complex revision surgery. It is also sometimes used in certain fracture repairs where bone healing is delayed or at higher risk of failure. Your surgeon will discuss whether it is appropriate for your specific procedure.

BMP is generally considered safe and effective for its approved uses, but like any surgical adjunct, it carries some specific risks, including excessive bone formation, swelling, or, rarely, an increased risk of certain complications depending on the surgical site. Your surgeon will weigh these risks against the potential benefit of improved bone healing for your particular situation. It is not used in every case, precisely because of these specific considerations.

BMP can reduce the need for taking a bone graft from another part of your own body (such as the hip), which avoids the additional pain and complications associated with a graft harvest site. It can also improve fusion rates in certain higher-risk surgical situations. Not every surgery benefits from BMP, so your surgeon will advise if a graft, BMP, or a combination is most appropriate.

Bone healing and fusion still generally takes several months, similar to standard bone grafting, though BMP may improve the likelihood of successful fusion in certain higher-risk cases. Your surgeon will use imaging at follow-up appointments to check how healing is progressing. The overall recovery timeline for the surgery itself depends more on the specific procedure than on the use of BMP alone.

Traditional bone grafting uses bone taken from elsewhere in your body or from a donor to provide a scaffold and biological material for new bone to grow, while BMP is a growth factor that stimulates your own cells to form new bone without necessarily needing a separate graft harvest. BMP avoids the extra surgical site and associated pain of harvesting your own bone, but it comes with its own specific set of considerations and is not suitable for every situation. Your surgeon will recommend the most appropriate option based on your specific surgery and risk factors.

This is usually discussed as part of your pre-operative planning for spinal or complex fracture surgery, particularly if you have risk factors for delayed bone healing such as smoking or osteoporosis. A private consultation with a spinal or orthopaedic surgeon allows a detailed discussion of whether BMP is appropriate for you, usually available within about two weeks. Make sure to ask about the specific risks and benefits relevant to your own health and the type of surgery planned.