Anterior cervical plate system
AssigneeSDGI Holdings, Inc.
InventorGary K. Michelson
Life of this patent
Estimating the term…
Abstract
Anatomically contoured anterior cervical plates with bone ingrowth surfaces, providing for intersegmental compressive preloading, and a rigid and locked interface to all of the bone screws, with those engaging the vertebrae deployed in highly convergent pairs. The bone screws have a tapered self-tapping leading end, an increasing root diameter with a generally constant outer diameter with a thread that is narrow and sharp throughout and an enlarged head portion capable of an interference fit to the receiving holes of the plate. Instrumentation consists of plate holders, a compression apparatus and a pilot hole forming device that interlocks with the plate. Methods for spinal compression and bone hole preparation are provided.
Claims58
A plate adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two cervical vertebral bodies to be fused together, said plate comprising:
- a longitudinal axis, a lower surface being concave along a substantial portion of the longitudinal axis of said plate and adapted to contact the cervical vertebral bodies, and an upper surface opposite said lower surface, said lower surface of said plate being configured to promote bone growth along and into said lower surface from vertebral body to vertebral body;
- and
- at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, each of said bone screw receiving holes being adapted to receive a screw for engaging said plate to the cervical spine.
A plate adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two cervical vertebral bodies to be fused together, said plate comprising:
- a longitudinal axis, a lower surface being concave along a substantial portion of the longitudinal axis of said plate and adapted to contact the cervical vertebral bodies, and an upper surface opposite said lower surface, said lower surface of said plate being coated with bone morphogenetic protein to promote bone growth along said lower surface from vertebral body to vertebral body;
- and
- at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, each of said bone screw receiving holes being adapted to receive a screw for engaging said plate to the cervical spine.
Dependencies are inferred from the claim text.