Pedicle replacement device
AssigneeChap-Med, Inc.
InventorJames L. CHAPPUIS
Life of this patent
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Abstract
A pedicle replacement device is designed to both replace the pedicle through osseointegration and protect the nerves and surrounding tissue from injury by pedicle screws or other surgical devices and instruments. The implant is configured to shield a fixture, reduce nerve root irritation, and diminish loosening of the fixture, when the fixture is implanted into the void of a target site. The implant includes features for stabilizing and securing the implant within the void at the target site. For example, in one embodiment, the implant includes counterclockwise threads that stabilize the implant against rotational and extractive forces that could disturb the implant.
Claims20
An implant for replacing a pedicle comprising:
- a semi-cylindrical elongate body formed about an axis of revolution,
- wherein the elongate body further comprises
- a proximal end;
- a distal end comprising a tapered tip surface;
- an interior channel surface extending an entire distance between the proximal and distal ends;
- and
- an external surface comprising counterclockwise threads extending from the proximal end to a proximal end of the tapered tip.
A system for stabilizing a surgical fixture comprising:
- a pedicle replacement device comprising:
- a semi-cylindrical elongate body formed about an axis of revolution,
- wherein the elongate body further comprises
- a proximal end;
- a distal end comprising a tapered tip surface;
- an interior channel surface extending an entire distance between the proximal and distal ends;
- an external surface comprising counterclockwise threads extending from the proximal end to a proximal end of the tapered tip;
- and
- a pedicle screw comprising clockwise threads,
- wherein the pedicle replacement device has a length less than a length of the pedicle screw.
An implant for replacing a pedicle comprising:
- a semi-cylindrical elongate body formed about an axis of revolution,
- wherein the elongate body further comprises
- a proximal end;
- a distal end comprising a tapered tip surface;
- an interior channel extending an entire distance between the proximal and distal ends, wherein the interior channel is configured to receive a pedicle screw;
- and
- an external surface comprising counterclockwise threads extending from the proximal end to a proximal end of the tapered tip, wherein the external surface comprises a porous osseointegrative surface;
- wherein the length of the pedicle replacement implant is between about 20 mm and 25 mm;
- and
- wherein the pedicle replacement implant comprises titanium, PEEK, a modified PEEK, or a combination thereof.
Dependencies are inferred from the claim text.