Intersomatic implants in two parts
AssigneeStryker France
InventorYves Crozet
Life of this patent
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Abstract
A spinal implant includes a hollow body having a distal end, a proximal end, and a pair of lateral walls extending from the distal end to the proximal end, the lateral walls having a concave-shaped cross-section and having concave, non-threaded interior surfaces for defining an at least partially cylindrical internal space between the lateral walls. The spinal implant also includes an anchoring member having bone anchoring projections including a screw thread on an exterior surface thereof, wherein at least one of the lateral walls adjacent the proximal end of the hollow body includes a reentrant thread adapted to cooperate with the screw thread of the anchoring member when the anchoring element is rotated for enabling the anchoring member to be screwed into the internal space of the hollow body.
Claims25
A spinal implant comprising:
- a hollow body having a distal end, a proximal end, and a pair of lateral walls extending from said distal end to said proximal end, said lateral walls having a concave-shaped cross-section and having concave, non-threaded interior surfaces for defining an at least partially cylindrical internal space between said lateral walls;
- and
- an anchoring member having bone anchoring projections including a screw thread on an exterior surface thereof, wherein at least one of said lateral walls adjacent the proximal end of said hollow body includes a reentrant thread adapted to cooperate with the screw thread of said anchoring member when said anchoring element is rotated for enabling said anchoring member to be screwed into the internal space of said hollow body.
A method for positioning an implant in an intervertebral space of a vertebral column, said implant comprising a hollow body having a pair of lateral walls having a concave-shaped cross-section and having concave, non-threaded interior surfaces defining an at least partially cylindrical internal space, and an anchoring member threadable into the internal space of said hollow body, said anchoring member having projections on an exterior surface thereof having a diameter greater than an overall height of said hollow body, the method comprising:
- filling said hollow body with a bone growth promoting substance;
- inserting said hollow body into an intervertebral space so that the internal space of said hollow body is in communication with opposing vertebrae over and under said hollow body;
- and
- screwing said bone anchoring member into said hollow body so that said projections cut into said opposing vertebrae for anchoring said hollow body in said intervertebral space.
Dependencies are inferred from the claim text.