Bone positioning guide
A bone positioning guide may include a main body member, a shaft, and a bone engagement member. The shaft can be movably connected to the main body member and have the bone engagement member rotatably coupled to its distal end. The bone engagement member can have a surface configured to engage a bone. The main body member can also include a tip opposite the bone engagement member for engaging a second bone. In use, the bone engagement member may be positioned in contact with a medial side of a first metatarsal while the tip is positioned in contact with a lateral side of a different metatarsal, such as a second metatarsal. The shaft can then be moved to advance the bone engagement member toward the tip, causing realignment of the first metatarsal.
1. A bone positioning guide for a bunion correction procedure, the bone positioning guide comprising:
a main body member;
a bone engagement member on one side of the main body member, the bone engagement member being configured to contact a first metatarsal of a foot;
a tip on another side of the main body member, the tip being configured to contact a metatarsal other than the first metatarsal;
a depth stop configured to limit a depth of insertion of the tip relative to the metatarsal other than the first metatarsal; and
a mechanism that allows the bone engagement member and the tip to be moved toward each other.
2. The bone positioning guide of claim 1 , wherein
the metatarsal other than the first metatarsal is a second metatarsal, the first metatarsal and the second metatarsal defining an intermetatarsal angle therebetween,
the tip is configured to be inserted into an intermetatarsal space between the second metatarsal and a third metatarsal, and
the depth stop is configured to limit the depth of insertion of the tip into the intermetatarsal space between the second metatarsal and the third metatarsal.
3. The bone positioning guide of claim 1 , wherein
the main body member defines a base, a first leg carrying the bone engagement member, and a second leg defining the tip,
the base is configured to extend in a medial-to-lateral direction across a dorsal surface of the first metatarsal and across a dorsal surface of the metatarsal other than the first metatarsal,
the first leg extends downwardly from the base and is configured to position the bone engagement member on a medial side of the first metatarsal, and
the second leg extends downwardly from the base and is configured to position the tip on a lateral side of the metatarsal other than the first metatarsal.
4. The bone positioning guide of claim 1 , wherein
the tip defines a surface configured to contact a lateral side of the metatarsal other than the first metatarsal, and
the depth stop extends away from the surface of the tip, thereby providing a dorsal contact surface configured to contact a dorsal portion of the metatarsal other than the first metatarsal, when the tip is inserted plantarly relative to the metatarsal other than the first metatarsal.
5. The bone positioning guide of claim 1 , wherein the bone engagement member defines a surface that is configured such that, when the first metatarsal is in contact with the surface, the first metatarsal can rotate with respect to the surface.
6. The bone positioning guide of claim 1 , wherein the bone engagement member is a planar surface.
7. The bone positioning guide of claim 1 , wherein the bone engagement member defines a concave surface.
8. The bone positioning guide of claim 1 , wherein the tip defines an end, and the tip is tapered toward the end.
9. The bone positioning guide of claim 1 , wherein the tip is curved toward the bone engagement member.
10. The bone positioning guide of claim 1 , wherein the bone engagement member defines a cannulation through which a fixation wire is configured to be inserted.
11. The bone positioning guide of claim 10 , wherein the fixation wire is a K-wire.
12. The bone positioning guide of claim 1 , wherein the mechanism comprises a ratchet.
13. The bone positioning guide of claim 1 , wherein the mechanism comprises a threaded shaft.
14. The bone positioning guide of claim 1 , wherein the mechanism comprises a rack and a pinion.
15. The bone positioning guide of claim 1 , wherein the mechanism comprises a sliding connection.
16. The bone positioning guide of claim 1 , further comprising an actuator configured to actuate the mechanism.
17. The bone positioning guide of claim 16 , wherein the actuator comprises a tenaculum or tong structure configured to be squeezed together to actuate the actuator.
18. The bone positioning guide of claim 1 , wherein the bone engagement member is aligned with an axis that intersects the tip.
19. The bone positioning guide of claim 1 , wherein the bone positioning guide is fabricated from two components that are joined together to form the bone positioning guide.
20. The bone positioning guide of claim 1 , wherein the bone positioning guide is fabricated from more than two components that are joined together to form the bone positioning guide.
21. The bone positioning guide of claim 1 , wherein the bone positioning guide is fabricated from a radiolucent material.
22. The bone positioning guide of claim 1 , wherein:
the metatarsal other than the first metatarsal is a second metatarsal, the first metatarsal and the second metatarsal defining an intermetatarsal angle therebetween,
the main body member defines a base, a first leg carrying the bone engagement member, and a second leg defining the tip,
the base is configured to extend in a medial-to-lateral direction across a dorsal surface of the first metatarsal and across a dorsal surface of the second metatarsal of the foot,
the first leg extends downwardly from the base and is configured to position the bone engagement member to contact a medial side of the first metatarsal,
the second leg extends downwardly from the base and is configured to position the tip in an intermetatarsal space between the second metatarsal and a third metatarsal and in contact with a lateral side of the second metatarsal, and
the depth stop is configured to limit the depth of insertion of the tip into the intermetatarsal space between the second metatarsal and the third metatarsal, the depth stop extending away from a surface of the tip configured to contact the lateral side of the second metatarsal and in a direction toward the bone engagement member, thereby providing a dorsal contact surface configured to contact a dorsal portion of the second metatarsal, when the tip is inserted into the intermetatarsal space between the second metatarsal and the third metatarsal.
23. The bone positioning guide of claim 22 , wherein the bone engagement member is a planar surface.
24. The bone positioning guide of claim 23 , wherein the bone engagement member defines a cannulation through which a K-wire is configured to be inserted.
25. The bone positioning guide of claim 24 , wherein the mechanism comprises a ratchet.
26. The bone positioning guide of claim 25 , further comprising an actuator configured to actuate the mechanism.
27. The bone positioning guide of claim 26 , wherein the actuator comprises a tenaculum or tong structure configured to be squeezed together to actuate the actuator.
28. The bone positioning guide of claim 25 , wherein the tip is curved toward the bone engagement member.
29. The bone positioning guide of claim 25 , wherein the bone positioning guide is fabricated from two or more components that are joined together to form the bone positioning guide.
30. The bone positioning guide of claim 25 , wherein the bone positioning guide is fabricated from a radiolucent material.