Adjustable distraction cage with linked locking mechanisms
First Claim
1. A spinal implant for placement between first and second vertebral bodies, comprising:
- at least two separate first members having a surface for engaging a first vertebral body and a side surface;
a second member cooperating with the at least two first members and having a surface for engaging a second vertebral body;
a housing; and
at least two independently extendable support elements at least partially within the housing, each having a contracted configuration to facilitate deployment of the implant between the first and second vertebral bodies and at least one extended configuration to extend said at least two first members away from the second member so that the surface thereof engages the first vertebral body,wherein the at least two first members comprises separate members with one of the separate members connected to each of the at least two independently extendable support elements, andwherein the at least two first members accommodates different extended heights of the at least two extendable support elements with respect to each other;
wherein the at least two independently extendable support elements comprise fluid actuatable pistons actuatable by a common actuator to different heights above the second member andwherein the side surfaces of the at least two first members are adjacent to each other when the at least two independently extendable support elements are in the contracted configuration.
2 Assignments
0 Petitions
Accused Products
Abstract
A spinal implant which is configured to be deployed between adjacent vertebral bodies. The implant has at least one extendable support element with a retracted configuration to facilitate deployment of the implant and an extended configuration so as to expand the implant and effectively distract the disc space, stabilize the motion segments and eliminate pathologic spine motion. The implant has a minimal dimension in its unexpanded state that is smaller than the dimensions of the neuroforamen through which it typically passes to be deployed within the intervertebral space. The implant is provided with a locking system having a plurality of linked locking elements that work in unison to lock the implant in an extended configuration. Bone engaging anchors also may be provided to ensure secure positioning.
-
Citations
17 Claims
-
1. A spinal implant for placement between first and second vertebral bodies, comprising:
-
at least two separate first members having a surface for engaging a first vertebral body and a side surface; a second member cooperating with the at least two first members and having a surface for engaging a second vertebral body; a housing; and at least two independently extendable support elements at least partially within the housing, each having a contracted configuration to facilitate deployment of the implant between the first and second vertebral bodies and at least one extended configuration to extend said at least two first members away from the second member so that the surface thereof engages the first vertebral body, wherein the at least two first members comprises separate members with one of the separate members connected to each of the at least two independently extendable support elements, and wherein the at least two first members accommodates different extended heights of the at least two extendable support elements with respect to each other; wherein the at least two independently extendable support elements comprise fluid actuatable pistons actuatable by a common actuator to different heights above the second member and wherein the side surfaces of the at least two first members are adjacent to each other when the at least two independently extendable support elements are in the contracted configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. The spinal implant for placement between first and second vertebral bodies, comprising:
-
at least two separate first members each having a top surface for engaging a first vertebral body, a side surface, and a bottom surface; a second member cooperating with the at least two first members and having a surface for engaging a second vertebral body; a housing; and at least two independently extendable support elements, each having a contracted configuration to facilitate deployment of the implant between the first and second vertebral bodies and at least one extended configuration to extend the at least two first members away form the second member so that the surface thereof engages the first vertebral body while accommodating different extended heights of said at least two extendable support members with respect to each other, wherein the at least two independently extendable support elements comprise fluid actuatable pistons; and wherein the bottom surfaces of the at least two first members abut the housing and the side surfaces of the at least two first members are adjacent to each other when the at least two independently extendable support elements are in the contracted configuration. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
Specification