Targeting device for use with systems, methods, and apparatuses for fusion, stabilization, and/or fixation of bones

1. A targeting device comprising:

a targeting arm including a targeting portion having one or more apertures for targeting reamer apertures, a hub having a bore, and a radial portion reaching radially between the hub and the targeting portion;

a target lock configured to rotate within the bore relative to the targeting arm between rotational orientations that are spaced apart about the hub at angles corresponding to predetermined locations of reamer apertures; and

a rotation arrestor having an arresting engagement portion configured to move into blocking engagement with the target lock to block rotation of the target lock within the bore relative to the targeting arm, and further configured to move into blocking engagement with the targeting arm only when the targeting arm and the target lock are located in one of the spaced apart rotational orientations.

2. The targeting device of claim 1 , wherein the target lock is configured to rotate within the bore relative to the targeting arm in opposite directions about the hub, and the arresting engagement portion of the rotation arrestor is configured to block rotation of the target lock within the bore relative to the targeting arm in both of the opposite directions simultaneously.

3. The targeting device of claim 1 , wherein the angles include an angle of about 90 degrees or more about the hub.

4. The targeting device of claim 1 , wherein the rotation arrestor is configured to encircle the target lock within the bore, the rotation arrestor has an inner periphery at which the arresting engagement portion projects radially inward, and the target lock has an outer periphery with indentations configured to receive the arresting engagement portion at selected locations about the outer periphery.

5. The targeting device of claim 4 , wherein the inner periphery of the rotation arrestor is configured to enable radial movement of the arresting engagement portion into engagement with an indentation on the target lock upon movement of the rotation arrestor laterally within the bore.

6. The targeting device of claim 4 , wherein the indentations include two indentations that are spaced apart about the outer periphery of the target lock at an angle of about 90 degrees or more, and the target lock is free of indentations configured to receive the arresting engagement portion of the rotation arrestor at peripheral locations between the two indentations.

7. The targeting device of claim 4 , wherein the indentations are openings at the outer periphery of the target lock, and the arresting engagement portion is configured for movement radially into and out of a selected opening.

8. The targeting device of claim 7 , wherein the arresting engagement portion of the rotation arrestor is configured as a radially projecting pin.

9. A targeting device comprising:

a targeting arm including a targeting portion having one or more apertures for targeting reamer apertures, a hub having a bore, and a radial portion reaching radially between the hub and the targeting portion;

a target lock configured to rotate within the bore relative to the targeting arm between rotational orientations that are spaced apart about the hub at angles corresponding to predetermined locations of reamer apertures; and

a rotation arrestor having an arresting engagement portion configured to move into blocking engagement with the target lock to block rotation of the target lock within the bore relative to the targeting arm;

wherein the rotation arrestor is configured to encircle the target lock within the bore, the rotation arrestor has an inner periphery at which the arresting engagement portion projects radially inward, and the target lock has an outer periphery with openings configured to receive the arresting engagement portion at selected locations about the outer periphery.

10. The targeting device of claim 9 , wherein the arresting engagement portion of the rotation arrestor is configured as a radially projecting pin.

11. The targeting device of claim 9 , wherein the inner periphery of the rotation arrestor is configured to enable radial movement of the arresting engagement portion into and out of a selected opening on the target lock upon movement of the rotation arrestor laterally within the bore.

12. The targeting device of claim 9 , wherein the openings include two openings that are spaced apart about the outer periphery of the target lock at an angle of about 90 degrees or more, and the target lock is free of openings configured to receive the arresting engagement portion of the rotation arrestor at peripheral locations between the two openings.

13. The targeting device of claim 9 , wherein the target lock is configured to rotate within the bore relative to the targeting arm in opposite directions about the hub, and the arresting engagement portion of the rotation arrestor is configured to block rotation of the target lock within the bore relative to the targeting arm in both of the opposite directions simultaneously.

14. The targeting device of claim 9 , wherein the angles include an angle of about 90 degrees or more about the hub.

15. A targeting device comprising:

a targeting arm including a targeting portion having one or more apertures for targeting reamer apertures, a hub having a bore, and a radial portion reaching radially between the hub and the targeting portion;

a target lock configured to rotate in opposite directions within the bore relative to the targeting arm between rotational orientations that are spaced apart about the hub at angles corresponding to predetermined locations of reamer apertures; and

a rotation arrestor having an arresting engagement portion configured to move into blocking engagement with the target lock to block rotation of the target lock within the bore relative to the targeting arm, and further configured to block rotation of the target lock within the bore relative to the targeting arm in both of the opposite directions simultaneously;

wherein the rotation arrestor is configured to encircle the target lock within the bore, the rotation arrestor has an inner periphery at which the arresting engagement portion projects radially inward, and the target lock has an outer periphery with openings configured to receive the arresting engagement portion at selected locations about the outer periphery; and

wherein the arresting engagement portion of the rotation arrestor is configured as a radially projecting pin.

16. The targeting device of claim 15 , wherein the inner periphery of the rotation arrestor is configured to enable radial movement of the arresting engagement portion into and out of a selected opening on the target lock upon movement of the rotation arrestor laterally within the bore.

17. The targeting device of claim 15 , wherein the openings include two openings that are spaced apart about the outer periphery of the target lock at an angle of about 90 degrees or more, and the target lock is free of openings configured to receive the arresting engagement portion of the rotation arrestor at peripheral locations between the two openings.

18. The targeting device of claim 15 , wherein the target lock is further configured to move into blocking engagement with the targeting arm only when the targeting arm and the target lock are located in one of the spaced apart rotational orientations.

19. The targeting device of claim 15 , wherein the angles include an angle of about 90 degrees or more about the hub.

20. The targeting device of claim 15 , wherein the openings include two openings that are spaced apart about the outer periphery of the target lock at an angle of about 90 degrees or more, and the target lock is free of openings configured to receive the arresting engagement portion of the rotation arrestor at peripheral locations between the two openings.