Lumbar spinal fusion has become a standard for spinal stabilization. Various techniques and approaches have evolved, but all are predicated on well-established fusion principles. These principles include, thorough disc removal, proper endplate preparation, and placement of a critical mass of bone graft material in contiguous contact with the vertebral bodies.
A universal challenge surgeons face during many lateral fusion procedures is the lack of graft-to-end plate contact during cage placement. Vertebral endplates are usually concave, while the contact points of the cage are typically flat. This results in a gap in surface area between the bone graft and endplate. This area of non-contact is called the “biologic void”.
In order to overcome this gap, surgeons have traditionally relied on powerful and expensive biologic products to increase the chances for fusion to occur.