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US 2016/0106550 A1Published application
Zero profile spinal fusion cage
AssigneeDePuy Synthes Products, Inc.
InventorsMichael A. Slivka, Alexander Grinberg, John Riley Hawkins
Life of this patent
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Abstract
An interbody fusion cage having upper and lower canals for receiving the heads of bone screws that have been pre-installed in opposing vertebral body endplates. The proximal wall of the cage preferably has a vertical slot that communicates with each canal and is adapted to allow access by a screwdriver and tightening of the screws.
Claims30
An intervertebral fusion device comprising:
- a first component having i) a proximal endface, ii) a distal endface, iii) a first outer surface that extends between the proximal and distal endfaces and positioned and configured to contact a vertebral endplate, iv) a through hole that extends through the first outer surface and adapted to promote vertebral fusion through the first component, and v) a first translation surface extending along a proximal-distal direction and oriented at an angle to the first outer surface;
- a rail component having i) a proximal end, ii) a distal end, iii) a second outer surface that extends between the proximal and distal ends, iv) a hole extending distally from an opening in the proximal end, and v) a second translation surface extending along the proximal-distal direction and oriented at an angle to the second outer surface;
- and
- a threaded screw disposed within the hole of the rail component,
- wherein the first and second translation surfaces are translatable upon each other along the proximal-distal direction, and
- wherein the first and second outer surfaces are substantially coplanar.
3 more elements
An intervertebral fusion device comprising:
- a first component having i) a proximal endface, ii) a distal endface disposed such that the proximal and distal endfaces are opposite each other along a proximal-distal direction, iii) a first outer surface that extends between the proximal and distal endfaces, iv) a through hole extending through the first outer surface, and v) a first translation surface extending in a proximal-distal direction and oriented oblique to the first outer surface;
- a rail component having i) a proximal end, ii) a distal end disposed such that the proximal and distal ends of the rail component are opposite each other along the proximal-distal direction, iii) a second outer surface that extends between the proximal and distal ends, wherein the second outer surface is parallel to the first outer surface, iv) a hole extending into the proximal end, and v) a second translation surface extending in a proximal-distal direction and oriented oblique to the second outer surface;
- and
- a screw having a threaded shaft that that extends into the hole of the rail component,
- wherein the first and second translation surfaces are translatable upon each other along the proximal-distal direction.
2 more elements
An intervertebral fusion device comprising:
- a first component having i) a proximal end, ii) a distal end disposed such that the proximal and distal ends are opposite each other along a proximal-distal direction, iii) a first outer surface disposed between the two ends and oriented along a first plane, iv) a hole extending through the first outer surface, and v) a first translation surface extending along the proximal-distal direction and oriented, wherein the first translation surface is non-parallel to the first plane;
- a rail component having i) a proximal endface, ii) a distal end, iii) a second outer surface disposed between the proximal end and the distal end, wherein the second outer surface is oriented along a second plane, iv) a through hole that extends into the proximal endface, and v) a second translation surface extending in the proximal-distal direction, wherein the second translation surface is non-parallel to the second plane;
- and
- a bone screw having a threaded shaft, the bone screw extending through the through hole of the rail component such that the shaft of the bone screw is oriented at an oblique angle with respect to the second plane,
- wherein the first and second translation surfaces are translatable upon each other along the proximal-distal direction.
2 more elements
Dependencies are inferred from the claim text.