In this prosthesis (1 ), - a first component (2) delimits a central housing (5)i.e. comprises a bottom (6) forming a first articular surface (11 ), a peripheralwall (7) and an edge (8) extending inwards, forming a supporting surface (12)and, a second articular surface (13),• - a second component (3) comprisesa plate (20) and a single central pin (21 ) with a widened head (22), this head (22)forming a third articular surface (23) able to cooperate with said first articularsurface (11 ), and a fourth articular surface (24) able to cooperate with saidsecond articular surface (13)； - the prosthesis (1 ) comprises an component (4)in an elastically deformable material, interposed between supporting surface(12) and plate (20).
