Expandable spinal interbody and intravertebral body devices
AssigneeLife Spine, Inc.
InventorsMichael S. Butler, Daniel Predick
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.
Claims20
An implant for insertion into a spinal space, the implant comprising:
- a body assembly, the body assembly comprising a first portion moveably coupled to a second portion by a control member along a longitudinal axis;
- and
- a plurality of support members disposed at least partially between the first portion and the second portion, the plurality of support members including four support members;
- wherein movement of the second portion relative to the first portion along the longitudinal axis causes the plurality of support members to move radially relative to the longitudinal axis;
- wherein the plurality of support members slidably engage the first and second portions of the body as the support members move radially relative to the longitudinal axis;
- and
- wherein the control member includes a first generally cylindrical end received within the first portion, a second generally cylindrical end received within the second portion, and a rectangular shaped portion defining a bone graft cavity disposed between the first end and the second end.
An implant comprising:
- a front portion;
- a rear portion;
- an intermediate portion coupled to the front portion and the rear portion and defining a longitudinal axis, wherein the intermediate portion includes a first generally cylindrical end received within the front portion, a second generally cylindrical end received within the rear portion, and a rectangular shaped portion defining a bone graft cavity disposed between the first and the second end;
- and
- a plurality of support members configured to move radially outward relative to the longitudinal axis in a linear fashion as the rear portion moves toward the front forward portion to increase a height and a width of the implant.
An implant for insertion into a spinal space, the implant comprising:
- a body portion;
- and
- a plurality of support portions coupled to the body portion and moveable relative to the body portion in a linear radial direction to increase a height and a width of the implant;
- wherein adjacent ones of the plurality of support portions move relative to one another at non-straight angles;
- wherein the plurality of support portions include four support portions that define first and second coplanar upper surfaces configured to engage vertebral bodies and first and second coplanar lower surfaces configured to engage vertebral bodies;
- and
- wherein the plurality of support portions slidably engage the body portion as the plurality of support portions move relative to the body portion in the linear radial direction.
Dependencies are inferred from the claim text.