Clinical Trials

As of early 2018, Dr. Bernard Guiot is participating in the VAST study, a new regenerative study for lumbar degenerative disc disease.

New Regenerative Therapy Study for Lumbar Degenerative Disc Disease

Beginning in early 2018, South Denver Neurosurgery will be participating with other spine centers around the nation in a study, called VAST. (VAST, in case you’re wondering, stands for Viable Allograft Supplemented Disc Regeneration in the Treatment of Patients with Low Back Pain with or without Intervertebral Disc Herniation. And that’s why we refer to it simply as VAST.) VIA Disc is a tissue therapy that includes the implantation of allograft nucleus pulposus matrix to supplement the patient’s own nucleus, potentially restoring the cushioning support of the intravertebral disc. In this study, we will be exploring whether VIA Disc can bring about disc regeneration, and in turn help relieve pain. If you have lower back pain caused by degenerative disc disease and are interested in participating in the VAST study, make an appointment at South Denver Neurosurgery by calling our offices.


Dr. Bernard Guiot is currently participating in two FDA clinical investigative studies.


The Superion Interspinous Spacer (ISS) is an investigational new device for the treatment of moderate lumbar spinal stenosis. Lumbar spinal stenosis is narrowing of the spinal canal that usually starts gradually and develops over a period of time. As the spinal canal narrows, it can compress and irritate the nerves that branch out from the spinal cord. This can create pain, numbness and weakness in the legs. This FDA clinical investigation is to demonstrate the safety and effectiveness of Superion.

Superion ISS may offer a minimally-invasive alternative to spinal decompression surgery for patients who meet the study criteria and agree to participate in the study. For more information, visit or schedule an appointment with Dr. Guiot.

Alphatec Spine

The OsseoFix implant is an investigational medical device used in treating vertebral compression fractures (VCF). A VCF occurs when the bones of the spine (vertebrae) become broken. A VCF can be caused by osteoporosis, a tumor or trauma to the back. If you are suffering from back, neck and sometimes hip pain related to a vertebral compression fracture (VCF), you are invited to see if you qualify for our clinical study. For more information, visit