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US 8,556,974 B2Granted
Device for stabilizing a vertebral joint and method for anterior insertion thereof
AssigneeGlobus Medical, Inc.
InventorsSean Suh, Jon Suh, Vipin Kunjachan, David C. Paul
Life of this patent
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Abstract
A prosthetic device can be used as a prosthesis following a discectomy or a corpectomy. The prosthetic device includes two endplates with staggered motion limiting members. The device can be configured to allow six degrees of motion when comparing one endplate relative to the other. The endplates can be configured to fix the joint by changing the body held within the device and by adding a locking plate and fasteners. A method teaches how to insert a device to an intervertebral space via an anterior incision.
Claims16
A device for stabilizing a first vertebra relative to a second vertebra, the device comprising:
- a superior endplate having an inferior surface and a motion limiting member, said motion limiting member extending downward below said inferior surface;
- an inferior endplate having a superior surface and a motion limiting member, said motion limiting member extending upward above said superior surface, wherein said motion limiting member extending from said superior surface is staggered from said motion limiting member of said inferior endplate;
- a compressible and flexible body having a superior surface and an inferior surface, said superior surface of said body facing said inferior surface of said superior endplate, said inferior surface of said body facing said superior surface of said inferior endplate, said body being held in contact with and laterally between said superior endplate and said inferior endplate by said motion limiting members, wherein the body is formed of at a first layer and a second layer, wherein the first layer is formed of a first material and the second layer is formed of a second material different from the first material;
- and
- wherein when said superior endplate and inferior endplate move too far laterally from each other, said motion limiting member extending from said superior surface contacts said motion limiting member extending from said inferior surface to limit how far the superior endplate and inferior endplate can shift relative to each other
- wherein as the body compresses and flexes, the motion limiting member of the superior endplate intermeshes with the motion limiting member of the inferior endplate
- wherein the device further comprises a locking plate having a superior screw anchoring member configured to connect to a first vertebra and an inferior screw anchoring member configured to connect to a second vertebra, wherein said superior screw anchoring member and said inferior screw anchoring member are laterally offset, said locking plate overlying said superior endplate and said inferior endplate,
- wherein the superior screw anchoring member is vertically aligned above the motion limiting member of the inferior implant.
5 more elements
A device for stabilizing a first vertebra relative to a second vertebra following a discectomy or a corpectomy, the device comprising:
- a substantially trapezoid shaped superior endplate having an anterior edge, a posterior edge, a right edge, a left edge, an inferior surface, a textured superior surface, and four motion limiting members extending inferiorly from said inferior surface, said substantially trapezoid shaped superior endplate having a bone growth bore formed therein;
- a substantially trapezoid shaped inferior endplate having an anterior edge, a posterior edge, a right edge, a left edge, a superior surface, a textured inferior surface, and four motion limiting members, one of said four motion limiting members extending superiorly from each of said four edges, said substantially trapezoid shaped inferior endplate having a bone growth bore formed therein;
- a compressible and flexible body having a superior surface, an inferior surface, and a height defined between said superior surface and said inferior surface, said superior surface of said body facing said inferior surface of said superior endplate, said inferior surface of said body facing said superior surface of said inferior endplate, said body being held in contact and laterally between said superior endplate and said inferior endplate by said motion limiting members;
- said motion limiting members being staggered and alternating by one of said motion limiting members of said superior endplate and one of said motion limiting members of said inferior endplate, said motion limiting member having a height shorter than said height of said body;
- wherein as the body compresses and flexes, the motion limiting member of the superior endplate intermeshes with the motion limiting member of the inferior endplate;
- a superior screw anchoring member extending superiorly from said anterior edge of said superior endplate, said superior screw anchoring member being configured to connect to a superior vertebra;
- and
- an inferior screw anchoring member extending inferiorly from said anterior face of said inferior endplate, said inferior screw anchoring member being staggered from said superior screw anchor and configured to connect to an inferior vertebra;
- and
- wherein when said superior endplate and inferior endplate move too far laterally from each other, said motion limiting members extending from said superior surface contact adjacent motion limiting members extending from said inferior surface to limit how far the superior endplate and inferior endplate can shift relative to each other
- wherein the device further comprises a locking plate having a superior screw anchoring member configured to connect to a first vertebra and an inferior screw anchoring member configured to connect to a second vertebra, wherein said superior screw anchoring member and said inferior screw anchoring member are laterally offset, said locking plate overlying said superior endplate and said inferior endplate,
- wherein the superior screw anchoring member is vertically aligned above one of the motion limiting members of the inferior implant.
9 more elements
Dependencies are inferred from the claim text.