A talus component (1) for a multicomponent ankle prosthesis has an underside (3) which faces towards the talus bone on implantation. Independent claims are also included for a tibia component-inlay combination for a multicomponent ankle prosthesis in which the tibia component (6) includes a plate (7) and a bone-anchoring device and the inlay (12) has a planar tibial surface where (A) the side of plate (7) turned towards the inlay (12) has a central protuberation (8) and a cutout (14) for protuberance (8) in the tibial surface of inlay (12), cutout (14) being such that inlay (12) can rotate with respect to tibia component (6) as well as making an AP surface while hindering sideways movement of inlay (12)； or (B) as in (a) but in which the plate (7) has a cutout (8a) and a protuberance (14a), cutout (8a) being such that inlay (12) can rotate with respect to tibia component (6) as well as making an AP surface while hindering sideways movement of inlay (12).본 발명은 다편 발목 관절 인공보철물을 위한 거골 요소에 관한 것으로, 거골 요소는 이식후 골성 거골(osseous talus)과 마주하는 바닥면을 가지며, 상기 골성 거골과 마주하는 상기 바닥면은 오목한 구형 세그먼트로 구성되는 것을 특징으로 한다.
