Bone growth stimulation (BGS) is a therapy your surgeon may prescribe following a spinal fusion procedure. A bone growth stimulator is a supplemental device worn following cervical (neck) or lumbar (low back) spine surgery. BGS may be utilized to help spinal bone fuse after a fusion procedure or as a treatment for failed fusion. Naturally, you have questions about this technology.
Gerard J. Girasole, MD, explained, “Bone growth stimulation for use in both the cervical and lumbar spine has shown to significantly benefit fusion results. Having been a study center for this technology, I have used bone growth stimulation in the majority of my post-operative cervical and lumbar patient cases. Not every patient is a candidate for bone growth stimulation. The patient evaluation criteria I use includes:
Spinal fusion is performed to stop movement of the spine and help prevent neurologic deficit. During the procedure, 2 or more vertebral bodies are joined together using instrumentation and bone graft. Spinal instrumentation includes rods, screws, plates, and/or interbody devices (implants). Bone graft may include your own bone (autograft), donor bone (allograft), or other types of graft.
Bone graft helps stimulate new bone to grow through 3 stages:
Some patients are at-risk for spinal fusion to not heal properly or fail. A failed fusion is also called pseudarthrosis or non-union. Pseudarthrosis and non-union are medical terms your surgeon may use to define a fusion problem.
Cervical (neck) / Lumbar (low back)
A BGS sends low level electrical signals to the fusion site. The electrical signals activate the body's natural bone healing process, which may be impaired in at-risk patients.
Over 50 years ago, scientists discovered that low-level electrical fields stimulate the body's bone-healing process. Other advances that include finding different types of energy that stimulate bone growth, electromagnetic coil technology and simply better devices— supported by scientific and clinical research—have improved bone healing in patients who undergo spinal fusion.
All bone growth stimulators are different. Certain types are designed to be surgically implanted (internal BGS) and other stimulators are worn outside the body (external BGS). Other differences include the type of electrical current or magnetic field generated by the device and how stimulation is transmitted to the spine.
The types of bone growth stimulation devices approved by the U.S. Food and Drug Administration (FDA) use direct current1, capacitive coupling2, combined magnetic fields3, or pulsed electromagnetic fields.4-6 Overall, it has been proven that fusion success can be increased in a patient treated with BGS compared to surgery without the use of BGS.