Back to results
US 8,728,160 B2Granted
Expandable intervertebral spacer
AssigneeWarsaw Orthopedic, Inc.
InventorsOren Globerman, Ronen Shavit
Life of this patent
Estimating the term…
Abstract
An expandable spacer, comprising: an axial tube having a surface, a proximal end and a distal end and a length, wherein, said surface defines a plurality of slits, said plurality of slits defining at least two axially displaced extensions, such that when said tube is axially compressed, said extensions extend out of said surface and define a geometry of an expanded spacer. Preferably the spacer is adapted to be inserted between two spinal vertebrae of a human.
Claims54
Instrumentation for treatment of the spine, comprising:
- an elongate member extending along a longitudinal axis and including a deformable distal end portion having an expandable length along said longitudinal axis and defining an initial configuration for placement adjacent a spinal structure and a deformed configuration defining a plurality of transverse projections, wherein each of said transverse projections is offset from an adjacent one of said transverse projections along said longitudinal axis, said transverse projections being positioned axially adjacent one another to define an expanded height of said deformable distal end portion along said expandable length for transverse engagement with at least a portion of the spinal structure,
- wherein said deformable distal end portion is at least partially formed of a flexible material and said deformable distal end portion is reformed from said initial configuration toward said deformed configuration in response to the imposition of stress, and is reformed toward said initial configuration upon removal of said stress, and
- wherein between three and eight of said transverse projections define an expanded height of said deformable distal end portion extending entirely over said expandable length.
Instrumentation for treatment of the spine, comprising:
- a first member;
- a second member having a distal end portion engaged with said first member, said distal end portion having an expandable length along a longitudinal axis and defining an initial
- configuration for placement adjacent a spinal structure and an expanded configuration including a plurality of transverse projections, wherein each of said transverse projections is offset from an adjacent one of said transverse projections along said longitudinal axis, said transverse projections being positioned axially adjacent one another to define an expanded height of said distal end portion along said expandable length for transverse engagement with at least a portion of the spinal structure;
- wherein relative displacement between said first and second members causes said distal end portion to reform from said initial configuration toward said expanded configuration and said instrumentation further comprises an actuator mechanism coupled between said first and second members and being operable to impart said relative displacement therebetween, and
- wherein said deformable distal end portion defines a non-expanded height when in said initial configuration and wherein said expanded height is at least two times larger than said non-expanded height.
2 more elements
Dependencies are inferred from the claim text.