Surgical instrument for moving vertebrae

• US 7,341,594 B2
• Filed: 04/23/2004
• Issued: 03/11/2008
• Est. Priority Date: 06/24/2002
• Status: Expired due to Term

• Current Assignee: Zimmer Biomet Spine, Inc. (Zimvie Incorporated)
• Original Assignee: Endius Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Anderson, Stephen J., Shluzas, Alan E., Unger, John D., Pagliuca, James J.
• Primary Examiner(s): Ramana; Anuradha
• Application Number:
  US10/830,937
• Publication Number:
  US 20040199170A1
• Time in Patent Office: 1,418 Days
• Field of Search: 606/53, 606/86, 606/90, 606/99, 606/105, 606205-208, 294/104, 814/51, 814/56
• US Class Current: 606/105
• CPC Class Codes: A61B 17/0206 with antagonistic arms as supports for retractor elements
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/7007 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
• CPC Class Codes: A61B 17/701 Longitudinal elements with a non-circular, e.g. rectangular, cross-section A61B17/7005, A61B17/7007 take precedence
• CPC Class Codes: A61B 17/7037 wherein pivoting is blocked when the rod is clamped
• CPC Class Codes: A61B 17/7079 Tools requiring anchors to be already mounted on an implanted longitudinal or transverse element, e.g. where said element guides the anchor motion
• CPC Class Codes: A61B 17/7091 for applying, tightening or removing longitudinal element-to-bone anchor locking elements, e.g. caps, set screws, nuts or wedges
• CPC Class Codes: A61B 17/8019 where the means are a separate tool rather than being part of the plate
• CPC Class Codes: A61B 17/8894 holding the implant into or through which the screw is to be inserted A61B17/7082, A61B17/7091 take precedence
• CPC Class Codes: A61B 2017/0256 for the spine

Abstract

A surgical instrument extendable through a cannula for moving a first bone portion relative to a second bone portion includes a first portion having a longitudinal axis engageable with a first member connected with to the first bone portion. A second portion is engageable with a second member connected with the second bone portion. The second portion is movable relative to the first portion from a first position toward a second position to move the first and second bone portions away from each other. An actuator connected with the second portion moves the second portion relative to the first portion in a direction extending transverse to the longitudinal axis.

Claims

1. A surgical instrument for moving a first bone portion relative to a second bone portion, said surgical instrument comprising:

a first portion having a longitudinal axis engageable with a first member connected with the first bone portion;

a second portion engageable with a second member connected with the second bone portion, said second portion being movable relative to said first portion; and

an actuator connected with said second portion for moving said second portion relative to said first portion in a direction extending transverse to said longitudinal axis to move the first and second bone portions relative to each other;

wherein said first portion has an end engageable with a clamping member threadably engaging a fastener connected to the first bone portion which clamps a longitudinal member extending between the first and second bone portions to the fastener, said first portion being rotatable about said longitudinal axis relative to the second portion to rotate the clamping member relative to the fastener.

2. A surgical instrument as set forth in claim 1 wherein said second portion is pivotally connected to said actuator.

3. A surgical instrument as set forth in claim 2 wherein said second portion is pivotally connected to a third portion, said actuator being movable relative to said third portion to move said second portion relative to said first portion.

4. A surgical instrument as set forth in claim 3 further including a control lever pivotally connected to said actuator for moving said actuator in a direction extending parallel to said longitudinal axis to move said second portion relative to said first portion.

5. A surgical instrument as set forth in claim 4 wherein said control lever is pivotally connected to said third portion, said control lever pivoting relative to said actuator and said third portion to move said second portion relative to said first portion.

6. A surgical instrument as set forth in claim 2 wherein said second portion engages a third portion, said actuator being movable relative to said third portion to move said second portion into engagement with said third portion and relative to said first portion.

7. A surgical instrument as set forth in claim 6 wherein said third portion includes a cavity into which a lobe on said second portion extends, said lobe engaging said third portion to pivot said second portion relative to said actuator.

8. A surgical instrument as set forth in claim 1 wherein said actuator is movable in a direction extending parallel to said longitudinal axis to move said second portion relative to said first portion.

9. A surgical instrument as set forth in claim 1 wherein said actuator at least partially defines a passage through which said first portion extends.

10. A surgical instrument as set forth in claim 9 further including a third portion at least partially defining said passage through which said first portion extends, said actuator being movable relative to said third portion to move said second portion relative to said first portion.

11. A surgical instrument as set forth in claim 10 wherein said first portion is axially movable relative to said third portion.

12. A surgical instrument as set forth in claim 1 wherein said first portion includes a ratcheting handle for rotating said first portion about said longitudinal axis.

13. A surgical instrument as set forth in claim 1 further including a controller for moving said actuator relative to said first portion to move said second portion relative to said first portion, said controller being rotatable about said longitudinal axis.

14. A surgical instrument as set forth in claim 13 wherein said controller engages said actuator and is axially movable relative to said first portion, said controller moving said actuator in a direction extending parallel to said longitudinal axis.

15. A surgical instrument as set forth in claim 14 wherein said controller threadably engages a third portion, said controller and said actuator being movable relative to said third portion.

16. A surgical instrument as set forth in claim 1 wherein said second portion is movable away from said first portion to move the first and second bone portions away from each other, said second portion being movable toward said first portion to move the first and second bone portions toward each other.

17. A surgical instrument as set forth in claim 1 wherein said second portion includes a cavity for engaging the second member connected to the second bone portion.

18. A surgical instrument as set forth in claim 1 wherein said second portion includes a recess for receiving a longitudinal member extending between the first and second bone portions and connected to one of the first and second bone portions.

19. A surgical instrument as set forth in claim 18 wherein said second portion includes a rounded portion engageable with the second member connected to the second bone portion to maintain a single point of contact with the second member connected to the second bone portion as said bone portion moves relative to said first portion.

20. The surgical instrument of claim 1, wherein the surgical instrument is configured to prevent rotation of the fastener and the longitudinal member while the clamping member is being rotated by the first portion.

21. The surgical instrument of claim 20, wherein the second portion includes a recess configured to receive the longitudinal member extending between the first and second bone portions.

22. A surgical instrument for moving a first bone portion away from a second bone portion comprising:

a first portion engageable with a first member connected with the first bone portion;

a second portion engageable with a second member connected with the second bone portion, said second portion being movable relative to said first portion from a first position toward a second position to move the first and second bone portions away from each other; and

an actuator for moving said second portion relative to said first portion to move the first and second bone portions toward or away from each other;

wherein said first portion is rotatable about a longitudinal axis of said first portion relative to the second portion, said first portion having an end engageable with a clamping member threadably engaging a fastener connected to the first bone portion which clamps a longitudinal member to the fastener.

23. A surgical instrument as set forth in claim 22 wherein said second portion is pivotally connected to said actuator.

24. A surgical instrument as set forth in claim 23 wherein said second portion is pivotally connected to a third portion, said actuator being movable relative to said third portion to move said second portion relative to said first portion.

25. A surgical instrument as set forth in claim 24 further including a control lever pivotally connected to said actuator and pivotally connected to said third portion for moving said actuator in a direction extending parallel to a longitudinal axis of said first portion.

26. A surgical instrument as set forth in claim 23 wherein said second portion includes a lobe extending into a cavity in a third portion, said actuator being movable relative to said third portion to move said lobe into engagement with said third portion to pivot said second portion relative to said actuator and move said second portion relative to said first portion.

27. A surgical instrument as set forth in claim 22 wherein said actuator is movable in a direction extending parallel to a longitudinal axis of said first portion to move said second portion relative to said first portion.

28. A surgical instrument as set forth in claim 22 wherein said actuator and a third portion define a passage through which said first portion extends, said actuator being movable relative to said third portion to move said second portion relative to said first portion.

29. A surgical instrument as set forth in claim 28 wherein said first portion is axially movable relative to said third portion.

30. A surgical instrument as set forth in claim 22 further including a controller for moving said actuator relative to said first portion to move said second portion relative to said first portion, said controller being rotatable about a longitudinal axis of said first portion.

31. A surgical instrument as set forth in claim 30 wherein said controller engages said actuator and is axially movable relative to said first portion, said controller moving said actuator in a direction extending parallel to a longitudinal axis of said first portion.

32. A surgical instrument as set forth in claim 31 wherein said controller threadably engages a third portion, said controller and said actuator being movable relative to said third portion to move said second portion relative to said first portion.

33. A surgical instrument as set forth in claim 22 wherein said second portion is movable from said second position toward said first position to move the first and second bone portions toward each other.

34. The surgical instrument of claim 22, wherein the surgical instrument is configured to prevent rotation of the fastener and the longitudinal member while the clamping member threadably engages the fastener.

35. The surgical instrument of claim 34, wherein the second portion includes a recess configured to receive the longitudinal member extending between the fastener and the second members.