Hydraulically actuated expanding spine cage with extendable locking anchor
First Claim
1. A spinal implant with hydraulically actuatable, locking bone engaging surfaces, comprising:
- a housing defining at least two laterally spaced circular openings;
a hydraulic piston disposed in each said opening, each said piston having an outer end movable from a contracted position within said housing to an extended position out of said housing;
a bone engaging surface disposed at each piston outer end;
a locking mechanism cooperating with said pistons to lock the pistons in the extended position; and
bone engaging anchors extendable from more than one side of the implant.
3 Assignments
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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. Angular deformities can also be corrected, and natural curvatures restored. Preferably, 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 preferably having a plurality of locking elements to lock the implant in an extended configuration. Bone engaging anchors also may be provided to ensure secure positioning.
253 Citations
14 Claims
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1. A spinal implant with hydraulically actuatable, locking bone engaging surfaces, comprising:
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a housing defining at least two laterally spaced circular openings; a hydraulic piston disposed in each said opening, each said piston having an outer end movable from a contracted position within said housing to an extended position out of said housing; a bone engaging surface disposed at each piston outer end; a locking mechanism cooperating with said pistons to lock the pistons in the extended position; and bone engaging anchors extendable from more than one side of the implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification