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US 12,491,080 B2Granted
Expandable spinal cage
AssigneeDynamic Implants Inc.
InventorsCarl Michael Nilsson, Yehuda Leib Herschman, Byron Douglas Giddens
Life of this patent
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Abstract
One or more techniques and/or systems are disclosed for an expandable spinal cage device used in a spinal fusion procedure. The device can comprise three major pieces that are combined to expand the device both laterally and vertically in the intervertebral gap. A first piece is a cage support body, and a second piece is a width expander body inserted into the first piece that laterally expands the first piece. A third piece is a vertical expander body inserted into the first or second piece that results in vertical expansion of first piece. In this way, the first piece can be expanded laterally up to two times, and vertically up to two times.
Claims22
An expanding spinal cage device, comprising;
- a first piece comprising a cage support body;
- a second piece unconnected to the first piece prior to insertion, the second piece comprising a width expander body configured and sized for insertion from an area outside of the first piece and into an interior cavity of the first piece resulting in lateral expansion of the first piece from a first width to a second width;
- and
- a third piece unconnected to the first piece and the second piece prior to insertion, the third piece comprising a vertical expander body configured and sized for insertion from an area outside of the first piece or the second piece and into the first or second piece resulting in vertical expansion of the first piece from a first height to a second height;
- wherein the second width is greater than the first width;
- wherein the second height is greater than the first height;
- wherein the first piece comprises a distal end and proximal end, the distal end configured for insertion into an intervertebral space in an unexpanded disposition;
- and
- wherein the second piece comprises a distal end and proximal end, the distal end of the second piece configured for operable insertion into the proximal end of the first piece;
- and the second piece comprising a top section and separable bottom section coupled together at the proximal end thereof in a hinged arrangement.
7 more elements
An expanding spinal cage device, comprising:
- a first piece operable to expand both vertically and laterally;
- a second piece unconnected to the first piece prior to insertion, the second piece comprising a lateral expander body, wherein insertion of the second piece from an area outside of the first piece and into an interior cavity of the first piece results in the lateral expansion of the first piece from a first width to a second width;
- and
- a third piece unconnected to the first piece and the second piece prior to insertion, the third piece comprising a vertical expander body, wherein insertion of the third piece from an area outside of the second piece and into the second piece results in vertical expansion of the first piece from a first height to a second height;
- wherein the second width is greater than the first width;
- and
- wherein the second height is greater than the first height.
4 more elements
An expanding spinal cage device, comprising:
- a first piece comprising two separate, identical pieces operably, selectably coupled together, respective pieces centrally split into two sides hinged together, wherein respective sides comprise teeth that meshedly interlock with the teeth on the other side, wherein respective pieces comprise teeth that meshedly interlock with the teeth on the other piece, and wherein respective pieces comprise top expansion teeth internally each having an angled face;
- a second piece unconnected to the first piece prior to insertion, the second piece comprising a lateral expander body with sides that engage the angled face of the top expansion teeth when inserted into an interior cavity of the first piece, from an area outside of the first piece, resulting in the lateral expansion of the first piece from a first width to a second width, the second piece, comprising a top section and bottom section that are hinged at a proximal end, and the second piece comprising intermeshing teeth disposed on the top and bottom sections;
- and
- a third piece unconnected to the first piece and the second piece prior to insertion, the third piece comprising a vertical expander body, wherein insertion of the third piece into the second piece, from an area outside of the second piece, results in the top section separating from the bottom section of the second piece in a hinged expansion, resulting in a vertical expansion of the first piece from a first height to a second height;
- wherein the second width is greater than the first width;
- and
- wherein the second height is greater than the first height.
4 more elements
Dependencies are inferred from the claim text.