Patent ID: 8668743

Claim:
An ankle prosthesis comprising: a talar component; a tibial component; and a dual bearing component situated between the talar component and the tibial component, the dual bearing component having an inferior bearing and a superior bearing, the inferior bearing having an inferior contoured surface and a rounded arch from a medial to lateral side thereof, the superior bearing having a smooth superior surface; the talar component having an inferior surface configured for fixation to one of a talus bone or a calcaneal bone, and a superior, contoured surface configured complimentary to the inferior contoured surface of the inferior bearing so as to articulate with the inferior bearing, the superior surface of the talar component curved from an anterior side to a posterior side, and the curved and contoured superior surface of the talar component includes first and second sagital longitudinal concave grooves extending from the anterior side to the posterior side and a first sagital longitudinal convex ridge situated between the first and second sagital longitudinal concave grooves, a radius of the first and second sagital longitudinal concave grooves and of the first sagital longitudinal convex ridge varying with a minor arc existing laterally and becoming greater medially for anatomic-like tracking of the talar component relative to the inferior bearing the tibial component having an superior surface configured for fixation to a tibia bone or a fibula bone, and a smooth inferior surface that allows the smooth superior surface of the superior bearing to glide thereon to allow for rotational and translational movement relative thereto.