IP Library › Granted Patent US 12,440,227
Granted Patent B2
US 12,440,227 · App. 18/252,547 · Granted Oct 14, 2025

Preparing a tibia for receiving tibial implant component of a replacement ankle

Inventors: Ramon Luna (Arlington, TN); Kian-Ming Wong (Lakeland, TN)
Assignee: WRIGHT MEDICAL TECHNOLOGY, INC.
A61B17/1682A61B17/1631A61B17/164A61B17/1775
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Quick Facts
Patent No.
US 12,440,227
App. No.
18/252,547
Granted
Oct 14, 2025
Kind
B2
Abstract

Disclosed is a method of preparing a tibial intramedullary canal for receiving a tibial implant such as a stem component of a total ankle replacement prosthesis where an extended cavity is prepared in the tibial intramedullary canal by pulling a tibial reamer bit in the proximal direction from the distal end of a tibia into the tibial intramedullary canal by using a flexible neck tooling introduced through the tibial intramedullary canal from a position proximal to the distal end of the tibia.

Claims (34)

1. A method of ankle replacement, the method comprising:

(a) forming an ankle joint space by resecting a distal end of a tibia;

(b) forming a cavity for a bone interface feature into the distal end of the tibia, wherein the cavity has a proximal end that is closed within the tibia and an opening at the distal end of the tibia;

(c) drilling a hole into the tibia using a flexible reamer fitted with a pilot cutting bit from a proximal tibia location until the flexible reamer exits into the cavity at a location that is at the proximal end of the cavity;

(d) slipping a stem reamer guide over the pilot cutting bit and inserting the stem reamer guide into the cavity's opening at the distal end of the tibia;

(e) replacing the pilot cutting bit with a tibial reamer bit that is configured for reaming in a proximal direction; and

(f) forming an extended cavity by pulling the tibial reamer bit through the stem reamer guide in the proximal direction and reaming the proximal end of the cavity by pulling the flexible reamer in the proximal direction.

2. The method of claim 1 , wherein the ankle joint space is anteriorly accessible.

3. The method of claim 1 , wherein the step (a) further comprises resecting a superior portion of the talus associated with the tibia to provide more space in the ankle joint space.

4. The method of claim 1 , further comprising:

(g) attaching a first reaming guide extender to a distal end of the tibial reamer bit; and

(h) continuing reaming the proximal end of the cavity further by pulling the flexible reamer in the proximal direction.

5. The method of claim 4 , further comprising:

attaching a second reaming guide extender to a distal end of the first reaming guide extender; and

continuing reaming the proximal end of the cavity further by pulling the flexible reamer in the proximal direction.

6. The method of claim 1 , wherein forming the cavity into the distal end of the tibia comprises using an angled neck reamer.

7. The method of claim 6 , wherein a neck of the angled neck reamer has an angle between 0°-180°.

8. A method of ankle replacement, the method comprising:

(a′) forming an ankle joint space by resecting the distal end of a tibia;

(b′) forming a cavity for a bone interface feature into the distal end of the tibia, wherein the cavity has a proximal end that is closed within the tibia and an opening at the distal end of the tibia;

(c′) inserting a stem reamer guide into the cavity's opening at the distal end of the tibia;

(d′) drilling a hole into the tibia using a flexible reamer fitted with a pilot cutting bit from a proximal tibia location;

(e′) replacing the pilot cutting bit with a tibial reamer bit that is configured for reaming in a proximal direction; and

(f′) forming an extended cavity by pulling the tibial reamer bit through the stem reamer guide in the proximal direction and reaming the proximal end of the cavity by pulling the flexible reamer in the proximal direction.

9. The method of claim 8 , wherein the ankle joint space is anteriorly accessible.

10. The method of claim 8 , wherein the step (a) further comprises resecting a superior portion of the talus associated with the tibia to provide more space in the ankle joint space.

11. The method of claim 8 , further comprising:

(g) attaching a first reaming guide extender to a distal end of the tibial reamer bit; and

(h) continuing reaming the proximal end of the cavity further by pulling the flexible reamer in the proximal direction.

12. The method of claim 11 , further comprising:

attaching a second reaming guide extender to a distal end of the first reaming guide extender; and

continuing reaming the proximal end of the cavity further by pulling the flexible reamer in the proximal direction.

13. The method of claim 8 , wherein forming the cavity into the distal end of the tibia comprises using an angled neck reamer.

14. The method of claim 13 , wherein a neck of the angled neck reamer has an angle between 0°-180°.

Assignments (1)
NUNC PRO TUNC ASSIGNMENT Recorded May 11, 2023
From: LUNA, RAMON; WONG, KIAN-MING (KEVIN)
To: WRIGHT MEDICAL TECHNOLOGY, INC.
Reel/Frame 063609/0973 →
Continuity (2)
Provisional Application 63152996 · Feb 24, 2021
Related Publication 20240016504A1 · Jan 18, 2024
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