The present invention discloses an intermediate segment (20) for arrangement between a concave implantation surface (14) of a joint component (10), particularly a femoral prosthesis, and bone tissue. The intermediate segment (20) comprises an intermediate segment body (23) with at least one side (24, 25) facing the joint component (10), wherein one (24) of the at least one side facing the joint component is convex. In addition, the intermediate segment (20) comprises a locking mechanism for attaching the intermediate segment to the joint component with at least a first (21) and a second (32) latching element, wherein at least one of the latching elements (21, 32) is movable. The present invention also relates to a joint component (10) comprising an intermediate segment (20) and a method for securing an intermediate segment (20) to a joint component (10).