Expandable spinal interbody and intravertebral body devices
AssigneeLife Spine, Inc.
InventorsMichael S. Butler, Michael J. Milella, JR.
Life of this patent
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Abstract
A device for insertion into a spinal (intervertebral or intravertebral) space is expandable from a first circumference to a second circumference through axial compression of segments of the device, particularly once the device has been properly situated within a vertebral space. The interbody/intravertebral body device is characterized by a plurality of axially stacked, individual segments that are provided on a central insertion and deployment rod. Each segment includes a central plate or body to which are pivotally attached plate or leaf structures. Pivoting of the structures provides a collapsed or unexpanded position of the first circumference and an open or expanded position of the second circumference.
Claims32
An implant for insertion into a spinal space, the implant comprising:
- a deployment component;
- and
- a plurality of segments disposed on the deployment component, each one of the plurality of segments expandable from a first diameter to a second diameter that is greater than the first diameter upon axial compression of the plurality of segments relative to the deployment component.
A spinal body for intravertebral/intervertebral implantation, the spinal body comprising:
- a deployment component;
- and
- a plurality of expansion structures carried on the deployment component and axially nested into one another, the plurality of expansion structures defining a first axial length and a first radial dimension when the expansion structures are in a collapsed position and defining a second axial length that is less than the first axial length and a second radial dimension that is greater than the first radial dimension when the expansion structures are in an expanded position due to axial compression of the plurality of expansion members.
A method of introducing a spinal body into an intervertebral or intravertebral space, the method comprising the steps of:
- providing an implant comprising a deployment component and a plurality of segments disposed on the deployment component wherein each one of the plurality of segments is expandable from a first diameter to a second diameter that is greater than the first diameter upon axial compression of the plurality of segments relative to the deployment component, the implant initially having the first diameter;
- inserting the implant of the first diameter into a cannula;
- positioning an opening of the cannula adjacent the vertebral space;
- extending the implant of the first diameter out of the cannula and into the vertebral space;
- and
- providing axial compression to the implant to put the implant into the second diameter.
Dependencies are inferred from the claim text.