Alignment instruments and methods for use in total ankle replacement
Alignment instruments may include joint-line referencing systems having an alignment arm having a body with first and second portions defining first and second sides. The first portion has at least one first pin tube through-hole extending from the first to the second side. The second portion has a first opening on the first side. A pin tube guide member is receivable in the first through-hole. The pin tube guide member has a passageway therethrough. An angelwing alignment member includes a portion receivable in the first opening of the alignment arm. An alignment foot is secured to the second portion, and the alignment foot has a handle and a shim. The shim is positionable in a joint between a first bone and a second bone, the alignment arm is alignable relative to a first bone, and the pin tube guide is operable for securing a pin into the first bone.
1. A joint-line referencing system comprising:
an alignment arm comprising a body having a first portion and a second portion, said first portion and said second portion defining a first side and a second side, said first portion having at least one first pin tube through-hole extending from said first side to said second side, the second portion having a first opening on said first side;
a first pin tube guide member receivable in said at least one first pin tube through-hole, said first pin tube guide member having a passageway therethrough;
an angelwing alignment member having a portion receivable in said first opening of said alignment arm;
an alignment foot secured to said second portion, said alignment foot having a handle extending away from said first side and a shim extending away from said second side; and
wherein said shim is positionable in a joint between a first bone and a second bone, said alignment arm is alignable relative to a first bone, and said first pin tube guide member is operable for securing a pin into the first bone.
2. The joint-line referencing system of claim 1 , wherein said alignment arm comprises a second pin tube-hole disposed between said at least one first pin tube through-hole and said first opening, and further comprising a second pin tube guide member receivable in said second pin tube through-hole, said second pin tube guide member having a passageway therethrough.
3. The joint-line referencing system of claim 1 , wherein said shim comprises a first flat surface and a second flat surface.
4. The joint-line referencing system of claim 3 , wherein said first flat surface of said shim is angled relative to said second flat surface.
5. The joint-line referencing system of claim 1 , wherein said shim comprises a longitudinal axis disposed parallel to an axis of said at least one first pin tube through-hole.
6. The joint-line referencing system of claim 1 , wherein said shim is disposed in alignment with said first opening so that said shim is disposed in alignment with said angelwing alignment member.
7. The joint-line referencing system of claim 1 , wherein said shim comprises a connector offset from said first surface and said second surface, and said connector is connectable to said second portion of said body of said alignment arm spaced from said first opening.
8. The joint-line referencing system of claim 7 , wherein said handle is connectable to said second portion of said body of said alignment arm spaced from said first opening, and said handle is aligned with said connector of said shim.
9. The joint-line referencing system of claim 1 , wherein said shim and said handle of said alignment foot are fixedly connected to said second portion of said alignment arm.
10. The joint-line referencing system of claim 1 , wherein said portion of said angelwing alignment member comprises a tab, and said first opening of said alignment arm comprises a slot for receiving said tab of said angelwing alignment member.
11. The joint-line referencing system of claim 1 , wherein said second portion comprises a second opening on said first side for receiving a second alignment device, said second opening disposed between said first opening and said at least one first pin tube through-hole.
12. The joint-line referencing system of claim 11 , further comprising said second alignment device comprising a laser alignment system.
13. The joint-line referencing system of claim 12 , wherein said laser alignment system is operable to project a laser line alignable with the first bone.
14. The joint-line referencing system of claim 11 , wherein said first opening comprises a first slot, and said second opening comprises a second slot parallel to said first slot.
15. The joint-line referencing system of claim 1 , wherein said shim comprise a curved shim.
16. The joint-line referencing system of claim 15 , wherein said alignment foot is pivotably attachable to said second portion of said alignment arm.
17. The joint-line referencing system of any of claim 1 , wherein said at least one first pin tube through-hole comprises separate individual side-by-side openings or a plurality of overlapping pin tube openings.
18. The joint-line referencing system of claim 17 , wherein said pin tube holes are oblong or elongated.
19. The joint-line referencing system of claim 1 , wherein said angelwing alignment member comprises a planar L-shaped angelwing alignment member.
20. The joint-line referencing system of claim 1 , wherein a first leg of said L-shaped angelwing alignment member comprises a tab receivable in said first opening, and a second leg of said L-shaped angelwing alignment member comprises an elongated opening, and further comprising an alignment rod extendable through said elongated opening and attachable to said angelwing alignment member.
21. The joint-line referencing system of claim 1 , wherein said first portion of said alignment arm is angled relative to said second portion of said alignment arm.