Ankle prosthesis with neutral position adjustment

摘要

An ankle prosthesis (1) having a talar implant (2) designed to be implanted in or on the talus (3), a tibial implant (4) designed to be implanted in or on the tibia (5), and an intermediate implant (6) designed to be interposed between the tibial implant and the talar implant. The intermediate implant (6) is designed to be mounted to move relative to the talar implant (2) at a contact interface (7) in order to allow the ankle to move. The ankle prosthesis (1) has configurable coupling means (10) designed to enable the intermediate implant (6) to be arranged relative to the tibial implant (4) in a specific configuration chosen from among a plurality of possible configurations.

主权项

1. An ankle prosthesis for use with an ankle, comprising:
a) a talar implant designed to be implanted in or on the talus; b) a tibial implant designed to be implanted in or on the tibia; and c) an intermediate implant designed to be interposed between the tibial implant and the talar implant, wherein the intermediate implant is designed to be mounted to move relative to the talar implant at a contact interface in order to allow the ankle to move, wherein the ankle prosthesis is provided with configurable coupling means including a base, a first portion of the base being connected to the intermediate implant, said configurable coupling means adapted for adjusting a position of said base relative to the tibial implant angularly about a medullary axis (ZZ′) of the tibia and linearly along an axis which is substantially normal to said medullary axis so as to position the base in an angularly and linearly chosen position relative to the tibial implant and for fastening the base to the tibial implant in the chosen position, wherein the configurable coupling means include engagement means for engaging the intermediate implant into the tibial implant.