The present invention relates to a prosthesis including a first component that delimits a single central housing, including a bottom forming a first articular surface, a peripheral wall and, at a distance from the bottom, an edge extending inwards, a peripheral supporting surface, and on the side turned towards said bottom a second articular surface； and a second component including a plate intended to come into contact with the vertebral plate of the relevant vertebra and a single central pin with a widened head.
