| 摘要 |
An ankle prosthesis comprising a tibial plate interacting with an intermediary element in order to constitute the articular surface of said prosthesis, while the intermediary element interacts with an astragalar plate secured to the astragalus, characterized by the fact that it comprises an articular surface (5) that is constituted on the intermediary element (3) by a cylindrical section (35) whose generant (36) is concave on the frontal plane and on the tibial plate (4), having a radius (r) whose center is located at the tibia, following a shape complementing that of the intermediary element (3) in order to achieve a precise interaction.
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