Cortical Concepts

Johns Hopkins University, 2009 - $20,000

The human spine is composed of vertically stacked vertebrae that form a protective canal for the spinal cord. Instability of the spine caused by vertebral fractures, deformities and other spinal disorders often requires surgical intervention, in which two metal screws are placed into parts of the vertebrae called pedicles and joined at adjacent vertebral levels with metal rods. However, patients with osteoporosis (and thus poor bone quality) are susceptible to screw pullout during the procedure. At the same time, osteoporotic patients stand to gain the most from the procedure.

Rather than reinvent the effective and well-established procedure of pedicle screw fixation, this E-Team is aiming to rebuild the strength of screw fixation in the pedicles by shifting the forces experienced by weak inner bone to strong outer bone. They call this method Corticoplasty™, and the device used in this approach will act as an intermediary between the bone-screw interface and provide a strong interference fit for existing screws in osteoporotic patients.