Curved spacer and inserter
View Patent ↗The present teachings provide one or more surgical implements for repairing damaged tissue, such as in the case of a spinal fixation procedure. A cross connector system for use during a spinal fixation procedure is provided. The system includes at least one bridge defining a coupling bore and having a pair of downwardly extending arms for coupling to a first fastener. The system includes a contoured bar having a first end offset from a second end, and a bore having a central axis. The system includes an expansion ring received within the bore, and a locking device received through the expansion ring and the coupling bore. The locking device is operable in a first state in which the contoured bar is movable about the central axis of the bore and in a second state in which the contoured bar fixed relative to the central axis of the bore.
1. An instrument for inserting an intervertebral spacer, the instrument comprising:
an elongated body comprising a proximal end, a distal end and a first passage extending from the proximal end to the distal end;
a handle coupled to the proximal end of the elongated body, the handle comprising a proximal end, a distal end, and a second passage extending from the proximal end to the distal end;
a rod receivable through the first passage and the second passage, the rod movable relative to the elongated body and the handle, the rod having a distal end that is removably coupleable to the intervertebral spacer;
a first arm at least partially disposed in the second passage and movable relative to the elongated body, the first arm comprising a distal end with a first curved surface for engaging the intervertebral spacer and a proximal end with an engagement feature and a first link feature;
a second arm at least partially disposed in the second passage and movable relative to the elongated body, the second arm comprising a distal end with a second curved surface for engaging the intervertebral spacer and a proximal end with a second link feature; and
a pivoting link disposed within the second passage of the housing, the pivoting link operably coupled to the first link feature and the second link feature such that movement of the first arm in a first direction causes reciprocal movement of the second arm in a second direction opposite the first direction;
wherein, when a driver engages the engagement feature of the first arm to actuate the first arm, and the first curved surface and the second curved surface are engaged with the intervertebral spacer, the reciprocal movement of the first arm and the second arm cooperate to selectively pivot the intervertebral spacer with respect to the instrument.
2. The instrument of claim 1 , wherein the driver comprises a cannulated shaft and wherein the rod extends through the cannulated shaft of the driver.
3. The instrument of claim 1 , further comprising an activation device operably coupled to the driver such that actuation of the activation device moves the first arm in the first direction and the second arm in the second direction.
4. The instrument of claim 3 , wherein the activation device is further coupled to the distal end of the handle.
5. The instrument of claim 1 , wherein the first curved surface and the second curved surface each include a plurality of teeth disposed therein for engaging the intervertebral spacer.
6. The instrument of claim 1 , wherein the first curved surface and the second curved surface each include an anti-rotation nub that restricts movement of the intervertebral spacer relative to the elongate body.
7. The instrument of claim 1 , further comprising a guide positioned within a proximal portion of the first passage of the elongated body.
8. The instrument of claim 7 , wherein the guide includes a first arm slot that slidably receives the first arm and a second arm slot that slidably receives the second arm.
9. The instrument of claim 7 , wherein the guide includes a bore disposed therein that slidably receives the rod therethrough.
10. An instrument for inserting an intervertebral spacer, the instrument comprising:
an elongated body comprising a first passage extending from a proximal end to a distal end thereof;
a handle coupled to the proximal end of the elongated body, the handle comprising a a second passage extending from a proximal end to a distal end thereof;
a rod receivable through the first passage and the second passage, the rod movable relative to the elongated body and the handle, the rod having a distal end that is removably threadably coupleable to the intervertebral spacer;
a drive arm at least partially disposed in the second passage and movable relative to the elongated body, the drive arm comprising a distal end with a first curved surface for engaging the intervertebral spacer and a proximal end with an engagement feature and a first link feature;
a passive arm at least partially disposed in the second passage and movable relative to the elongated body, the passive arm comprising a distal end with a second curved surface for engaging the intervertebral spacer and a proximal end with a second link feature; and
a pivoting link disposed within the second passage of the housing, the pivoting link operably coupled to the first link feature and the second link feature such that movement of the drive arm in a first direction causes reciprocal movement of the passive arm in a second direction opposite the first direction;
wherein, when a driver engages the engagement feature of the drive arm to a actuate the drive arm, and the first curved surface and the second curved surface are engaged with the intervertebral spacer, the reciprocal movement of the drive arm and the passive arm cooperate to selectively pivot the intervertebral spacer with respect to the instrument.
11. The instrument of claim 10 , wherein the driver comprises a cannulated shaft and wherein the rod extends through the cannulated shaft of the driver.
12. The instrument of claim 10 , further comprising an activation device operably coupled to the driver such that actuation of the activation device moves the drive arm in the first direction and the passive arm in the second direction.
13. The instrument of claim 12 , wherein the activation device is further coupled to the distal end of the handle.
14. The instrument of claim 10 , wherein the first curved surface and the second curved surface each include a plurality of teeth disposed therein for engaging the intervertebral spacer.
15. The instrument of claim 10 , wherein the first curved surface and the second curved surface each include an anti-rotation nub that restricts movement of the intervertebral spacer relative to the elongate body.
16. The instrument of claim 10 , further comprising a guide positioned within a proximal portion of the first passage of the elongated body.
17. The instrument of claim 16 , wherein the guide includes a drive arm slot that slidably receives the drive arm and a passive arm slot that slidably receives the passive arm.
18. The instrument of claim 16 , wherein the guide includes a bore disposed therein that slidably receives the rod therethrough.