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US 10,327,911 B2Granted
Enhanced cage insertion assembly
AssigneeDePuy Synthes Products, Inc.
InventorsJohn C Voellmicke, Michael J O'Neil, Derek Shaw, Alexander Grinberg
Life of this patent
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Abstract
An inserter instrument for inserting an intervertebral fusion cage having curved sidewalls, comprising: a) a threaded securement rod that mates with the cage via screw threads; b) a cannulated cage holder to receive the rod and hold the cage in position as the sheath is retracted; and c) a bulleted cannulated sheath, wherein the sheath is curved and comprises a superelastic shape memory material having a curved configuration and a straight configuration.
Claims4
An assembly comprising:
- i) an intervertebral fusion cage having curved, substantially parallel sidewalls, and
- ii) an inserter instrument for inserting the intervertebral fusion cage, comprising:
- a) a threaded securement rod that mates with the cage via screw threads;
- b) a cannulated cage holder to receive the rod and hold the cage in position;
- and
- c) a bulleted cannulated, extensible and retractable sheath extending from the cage holder,
- wherein the sheath is curved and comprises a superelastic shape memory material having a curved configuration and a straight configuration,
- wherein the cannulated cage holder holds the cage in position as the sheath is retracted, wherein the sheath comprises curved sidewalls having a geometry substantially similar to the curved, substantially parallel sidewalls of the cage, thereby providing for shielded placement of the cage in a final location prior to sheath retraction.
5 more elements
An assembly comprising:
- i) an intervertebral fusion cage having curved, substantially parallel sidewalls, and
- ii) an inserter instrument for inserting the intervertebral fusion cage, comprising:
- a) a threaded securement rod that mates with the cage via screw threads;
- b) a cannulated cage holder to receive the rod and hold the cage in position;
- and
- c) a bulleted cannulated, extensible and retractable sheath extending from the cage holder,
- wherein the sheath is curved and comprises a superelastic shape memory material having a curved configuration and a straight configuration,
- wherein the cannulated cage holder holds the cage in position as the sheath is retracted, and
- wherein the inserter is adapted for distal loading of the cage, thereby allowing for minimal diameter of the bulleted sheath and cannulated cage holder.
6 more elements
An assembly comprising:
- i) an intervertebral fusion cage having curved, substantially parallel sidewalls, and
- ii) an inserter instrument for inserting the intervertebral fusion cage, comprising:
- a) a threaded securement rod that mates with the cage via screw threads;
- b) a cannulated cage holder to receive the rod and hold the cage in position;
- and
- c) a bulleted cannulated, extensible and retractable sheath extending from the cage holder
- wherein the sheath is curved and comprises a superelastic shape memory material having a curved configuration and a straight configuration,
- wherein the cannulated cage holder holds the cage in position as the sheath is retracted, and
- wherein the inserter is adapted for proximal cage loading, thereby allowing for an increased diameter of the bulleted sheath and cannulated cage holder.
6 more elements
Dependencies are inferred from the claim text.