Patent ID: 8591595

Claim:
An endoprosthesis for replacing an ankle joint, comprising: a lower component which is configured to be connected to an ankle bone and which forms a top slide surface, an upper component comprising a plate having a planar or substantially planar bottom slide surface, a top connection surface, and a projection extending from the top connection surface configured for securing the upper component to a shin bone, the upper component further comprising an angle between 1° and 16° between the bottom slide surface and the top connection surface, wherein the upper component comprises a separable wedge-shaped part having one of a varying number of wedge angles and a non wedge-shaped part having no wedge angle, wherein the wedge-shaped part includes the planar or substantially planar bottom slide surface of the upper component and the non wedge-shaped part includes the top connection surface of the upper component, and an intermediate part configured to be positioned between the lower component and the upper component, the intermediate part comprising a first slide surface configured to interact with the top slide surface of the lower component and a second slide surface configured to interact with the bottom slide surface of the upper component, the second slide surface being planar or substantially planar.