Expandable motion preservation spacer
AssigneeGlobus Medical, Inc.
InventorWenhai Wang
Life of this patent
Estimating the term…
Abstract
Embodiments are directed to an expandable spacer for insertion between two adjacent bony structures or two adjacent joint surfaces, and more particularly relate to an expandable spacer for insertion into the void remaining in the intervertebral space. Embodiments may include an expandable spacer comprising a first endplate; a second endplate spaced from the first endplate; and one or more bags disposed between the first endplate and the second endplate that couple the first endplate to the second endplate. The one or more bags may be configured to receive a filler material to expand the expandable spacer from an initial position having a first height to an expanded position having a second height, wherein the second height is greater than the first height.
Claims16
An expandable spacer comprising:
- a first endplate;
- a first base plate that is received in the first endplate;
- a second endplate spaced from the first endplate;
- a second base plate that is received in the second endplate;
- and
- one or more bags disposed between the first endplate and the second endplate that couple the first endplate to the second endplate;
- wherein the one or more bags are configured to expand the expandable spacer from an initial position having a first height to an expanded position having second height, wherein the second height is greater than the first height, and
- wherein the first base plate comprises an extension from an interior side of the first base plate, and wherein the second base plate comprises a housing that extends from an interior side of the second plate and that slidably receives the extension from the first base plate.
An expandable spacer comprising:
- a first endplate having an exterior side and an interior side;
- a first main plate seated in the interior side of the first endplate;
- a second endplate having an exterior side and an interior side;
- a second main plate seated in the interior side of the second endplate;
- a plurality of bags disposed between the first main plate and the second main plate that couple the first main plate and the second main plate to one another, wherein the plurality of bags defines a perimeter that forms a hole;
- and
- an injection port fixedly attached to the second main plate and configured to expand the plurality of bags to place the expanded spacer in an expanded position,
- wherein the plurality of bags each comprise an inner layer and an outer layer that extend through grooves formed in the first main plate, the inner layer and the outer layer being secured to one another by stitches disposed between the first base plate and the first endplate.
Dependencies are inferred from the claim text.