US 12,251,315 B2
Total ankle replacement prosthesis
Lance Terrill, Oviedo, FL (US); Shawn Roman, Oviedo, FL (US); Timothy R. Daniels, Toronto (CA); Christopher F. Hyer, Columbus, OH (US); Selene G. Parekh, Cary, NC (US); and David I. Pedowitz, Penn Valley, PA (US)
Assigned to SMITH & NEPHEW, INC., Memphis, TN (US); SMITH & NEPHEW ORTHOPAEDICS AG SMITH, Zug (CH); and NEPHEW ASIA PACIFIC PTE LIMITED, Singapore (SG)
Filed by Smith & Nephew, Inc., Memphis, TN (US); Smith & Nephew Orthopaedics AG, Zug (CH); and Smith & Nephew Asia Pacific Pte. Limited, Singapore (SG)
Filed on May 23, 2022, as Appl. No. 17/751,047.
Application 17/751,047 is a continuation of application No. 16/876,824, filed on May 18, 2020, granted, now 11,369,481.
Application 16/876,824 is a continuation of application No. 16/146,325, filed on Sep. 28, 2018, granted, now 10,653,528, issued on May 19, 2020.
Application 16/146,325 is a continuation of application No. 15/459,935, filed on Mar. 15, 2017, granted, now 10,166,110, issued on Jan. 1, 2019.
Application 15/459,935 is a continuation of application No. 14/710,450, filed on May 12, 2015, granted, now 9,610,168, issued on Apr. 4, 2017.
Claims priority of provisional application 61/991,880, filed on May 12, 2014.
Prior Publication US 2022/0273452 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/42 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/4202 (2013.01) [A61F 2002/30331 (2013.01); A61F 2002/4205 (2013.01); A61F 2002/4207 (2013.01); A61F 2220/0033 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An ankle replacement prosthesis, comprising:
a tibial implant for implanting onto a tibia, the tibial implant including a tibia-facing surface and a lower surface opposed to the tibia-facing surface;
a talar implant for implanting onto a talus, the talar implant including a talus-facing surface and an upper surface opposed to the talus-facing surface;
an intermediate implant configured to fit between the tibial implant and the talar implant, the intermediate implant including a top surface, an opposing articulating surface, an anterior surface, and a posterior surface;
wherein the intermediate implant non-articulatingly attaches to the tibial implant and is capable of articulating with respect to the talar implant;
wherein the lower surface of the tibial implant includes a cutout region that defines a boundary along first, second, and third internal boundary sides, wherein the first, second, and third internal boundary sides define a tibial dovetail configuration, the top surface of the intermediate implant comprises a complementary feature to the tibial dovetail configuration, and wherein the tibial dovetail configuration of the tibial implant is configured to capture the complementary feature of the intermediate implant;
wherein the articulating surface of the intermediate implant has an anterior edge located between the anterior surface of the intermediate implant and the articulating surface and a posterior edge located between the posterior surface of the intermediate implant and the articulating surface;
wherein the anterior edge is at a different elevation than the posterior edge, with elevation being defined with respect to the top surface of the intermediate implant; and
wherein the anterior edge is more distal than the posterior edge.