Vertebral body prosthetic implant with slidably positionable stabilizing member

Abstract

A spinal stabilization device positionable between neighboring vertebral bodies to provide rigid internal fixation thereof and thus stabilize a spinal column which has been rendered unstable by disease or injury. The device includes a vertebral body prosthesis dimensioned to act as a replacement for a damaged vertebral body and associated discs which have been removed. Once implanted, the prosthesis provides direct mechanical stability and preserves the original spacing between the neighboring vertebral bodies, thereby preventing nerve damage and ensuring proper tensioning of the soft tissue surrounding the implantation site. To facilitate long-lasting bony fixation, the prosthetic implant is fabricated from a rigid, tantalum foam material. The open surface porosity at the interface between the adjacent vertebral bodies and the prosthesis enhances the opportunity for axial bone growth to take place, and ultimately, for fusion of the adjacent vertebral bodies to occur. External axial grooves may also be provided to further accommodate bone ingrowth or adjunct stabilizing members.

Dependencies are inferred from the claim text.