Surgical instrumentation assembly for positioning an ankle prosthesis

Patent metadata

Field	Value
Publication number	US-11285023-B2
Application number	US-202016734876-A
Country	US
Kind code	B2
Filing date	Jan 6, 2020
Priority date	Nov 4, 2011
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

In order to position an ankle prosthesis including a tibial implant and a talus implant provided with a talo-calcaneal anchoring keel, the invention proposes a surgical instrumentation assembly including: a tibial phantom (60) of the tibial implant, adapted so as to be attached to the tibia (T) of a patient, and an aiming guide (80) adapted for setting into place an instrumentation element (90) through the talus (A) and the calcaneus (C) of the patient, along an axis (Z-Z) for implanting the talo-calcaneal anchoring keel, the tibial phantom and the aiming guide mechanically cooperating with each other to restrict movement of the tibial phantom and the aiming guide relative to each other along vertical and medio-lateral directions, wherein the aiming guide is configured to guide placement of the instrumentation element.

First claim

What is claimed is:

1. A surgical method comprising:
attaching a tibial phantom to a tibia of a patient;
placing an aiming guide between said tibial phantom and a talus of a patient, wherein said aiming guide comprises a slot;
placing at least one instrumentation element through said slot of said aiming guide and into a talus and a calcaneus of the patient; and
removing said aiming guide from said tibial phantom while said aiming guide clears said at least one instrumentation element at said slot without removing said at least one instrumentation element from the talus and the calcaneus.

2. The surgical method of claim 1 , wherein removing said aiming guide from said tibial phantom includes sliding said aiming guide away from said tibial phantom.

3. The surgical method of claim 1 , wherein placing said aiming guide between said tibial phantom and the talus of the patient includes mechanically attaching said aiming guide to said tibial phantom.

4. The surgical method of claim 3 , further comprising adjusting an antero-posterior position of said aiming guide with respect to said tibial phantom, movement of said aiming guide with respect to said tibial phantom being substantially restricted along vertical and medio-lateral directions.

5. The surgical method of claim 4 , wherein mechanically attaching said aiming guide to said tibial phantom comprises attaching said aiming guide to said tibial phantom in a manner permitting sliding of said aiming guide with respect to said tibial phantom, and wherein adjusting said antero-posterior position of said aiming guide with respect to said tibial phantom comprises sliding said aiming guide along said antero-posterior direction with respect to said tibial phantom.

6. The surgical method of claim 1 , further comprising inserting a talus phantom onto the talus, wherein said talus phantom comprises a hole, and wherein inserting said talus phantom onto the talus comprises inserting said at least one instrumentation element through said hole, such that said talus phantom is inserted onto the talus without removal of said at least one instrumentation element from the talus and the calcaneus.

7. The surgical method of claim 6 , further comprising inserting a centering device over said at least one instrumentation element and into engagement with said talus phantom.

8. The surgical method of claim 1 , wherein said aiming guide further comprises a piercing barrel which at least partially opens into said slot, and wherein placing said at least one instrumentation element through said slot further comprises placing said at least one instrumentation element through said piercing barrel.

9. A surgical kit comprising:
an ankle prosthesis including a tibia implant and a talus implant provided with a talo- calcaneal anchoring keel;
a tibial phantom adapted for attachment to a tibia of a patient;
an aiming guide, adapted for setting into place an instrumentation element through a talus and a calcaneus of the patient along an axis for implanting the talo-calcaneal anchoring keel;
wherein said tibial phantom and said aiming guide mechanically engage with each other to allow movement of said aiming guide with respect to said tibial phantom along an antero-posterior direction and restrict movement of said tibial phantom and said aiming guide relative to each other along vertical and medio-lateral directions, wherein said aiming guide is configured to guide placement of said instrumentation element, wherein said aiming guide defines a through-passage for receiving said instrumentation element, said through-passage positioned to clear said aiming guide with respect to said tibial phantom attached to the tibia while leaving said instrumentation element in place through the talus and the calcaneus, and wherein said aiming guide includes a main body, which defines said through-passage; and
a piercing barrel removably attached to said main body while opening into said through- passage, said piercing barrel adapted for guiding said instrumentation element along said axis for implanting the talo-calcaneal anchoring keel.

10. The surgical kit of claim 9 , wherein said ankle prosthesis further comprises a prosthetic shoe.

11. The surgical kit of claim 9 , wherein said through-passage is a slot which opens onto two opposing faces of said main body along a longitudinal direction of said instrumentation element and onto at least one other face of said main body, so as to permit disengagement of said aiming guide from said tibial phantom while leaving said instrumentation element in place.

12. The surgical kit of claim 9 , further comprising a talus phantom.

13. A surgical kit comprising:
an instrumentation element;
an aiming guide, adapted for setting into place the instrumentation element through a talus and a calcaneus of a patient along an axis for implanting a talo-calcaneal anchoring keel of a talus implant, wherein said aiming guide defines a through-passage for receiving the instrumentation element, said through-passage positioned to disengage said aiming guide from the instrumentation element while leaving the instrumentation element in place through the talus and the calcaneus, wherein said aiming guide comprises a main body which defines said through-passage, wherein said through-passage is a slot which opens onto two opposing faces of said main body and onto at least one other face of said main body; and
a piercing barrel removably attached to said main body while opening into said through-passage, said piercing barrel adapted for guiding the instrumentation element.

14. The surgical kit of claim 13 , wherein said piercing barrel is received within a portion of said slot.

15. The surgical kit of claim 13 , further comprising a tibia implant and the talus implant with the talo-calcaneal anchoring keel.

16. The surgical kit of claim 13 , wherein said aiming guide further comprises a visual indicator configured to facilitate positioning of said aiming guide relative to a specific anatomic location of the talus.

17. The surgical kit of claim 16 , wherein said specific anatomic location of the talus is the talonavicular joint.

18. The surgical kit of claim 13 , wherein said slot includes a first width and a second width, wherein said first width is larger than said second width.

19. The surgical kit of claim 13 , wherein the instrumentation element is positionable within said slot and wherein said instrumentation element has a width smaller than said slot.

20. The surgical kit of claim 13 , further comprising at least one of a tibial phantom, a talus phantom, a prosthetic shoe, and a centering device.

Assignees

• Smith & Nephew Inc
• Smith & Nephew Orthopaedics Ag
• Smith & Nephew Asia Pacific Pte Ltd

Inventors

• Coulange Vincent
• Genna Sophie
• Brunnarius Yann
• Lizee Emmanuel
• Perineau Christophe
• Bonnin Michel
• Coetzee Christiaan
• Colombier Jean-Alain
• Judet Thierry
• Myerson Mark

Classifications

• A61F2/4684 Primary

  Trial or dummy prostheses · CPC title

• A61B17/1739

  specially adapted for particular parts of the body · CPC title

• A61B17/15

  Guides therefor · CPC title

• A61F2002/4205

  Tibial components · CPC title

• A61F2/4202

  for ankles · CPC title