Multilock anterior cervical plating system
First Claim
1. A plate system adapted for application to the anterior human cervical spine and for contacting at least a portion of the anterior aspects of at least two cervical vertebral bodies, said plate system comprising:
- a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, said plate having a lower surface for placement against the vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
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 having a central longitudinal axis and being adapted to receive a bone screw to attach for engaging said plate to the cervical spine; and
a lock adapted to overlie at least a portion of said at least two bone screw receiving holes, said lock having an elongated segment having a width, a length longer than said width, and a surface adapted to bear against said plate, said lock being adapted to engage said plate and being adapted to retain at least two bone screws to said plate when said length of said elongated segment is generally transverse to the longitudinal axis of said plate.
4 Assignments
0 Petitions
Accused Products
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.
152 Citations
40 Claims
-
1. A plate system adapted for application to the anterior human cervical spine and for contacting at least a portion of the anterior aspects of at least two cervical vertebral bodies, said plate system comprising:
-
a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, said plate having a lower surface for placement against the vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
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 having a central longitudinal axis and being adapted to receive a bone screw to attach for engaging said plate to the cervical spine; and
a lock adapted to overlie at least a portion of said at least two bone screw receiving holes, said lock having an elongated segment having a width, a length longer than said width, and a surface adapted to bear against said plate, said lock being adapted to engage said plate and being adapted to retain at least two bone screws to said plate when said length of said elongated segment is generally transverse to the longitudinal axis of said plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A plate system adapted for application to the anterior human cervical spine and for contacting at least a portion of the anterior aspects of at least two cervical vertebral bodies, said plate system comprising:
-
a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, said plate having a lower surface for placement against the vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
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 having a central longitudinal axis and being adapted to receive a bone screw to attach for engaging said plate to the cervical spine; and
a lock for locking at least two bone screws inserted in said at least two bone screw receiving holes, respectively, said lock being at least in part other than a screw, said lock having a central opening. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
Specification