A prosthesis for association with a mating component of a joint, the prosthesis comprising: a stem (12) including a fitting portion with the bone and a surface (15) to face the mating component of the joint surface defining a tapered bore (16) having a substantially uniform tapered surface, a head component including a surface (19) of support for articulation with the mating component of the joint, and an element (130) assembly including a portion (33) proximal configured for engagement with the head component and, likewise, includes a portion (134) of substantially solid joint defining surface spheroidal support sized to be received within the tapered hole size and to form a socket with the tapered hole when the portion of substantially solid joint is forced inside the hole, where e l fit substantially contiguous along a portion of the surface of spheroidal support defining a circle, wherein the surface of spheroidal support of the hinge portion of the mounting member and the drill are arranged such that the clamping element mounting on the tapered bore 15 is facilitated by achieving a snug fit involves frictional engagement surface uniformly spheroidal support with the tapered bore surface.Una prótesis para su asociación con un componente coincidente de una articulación, comprendiendo la prótesis: un vástago (12) que incluye una porción de encaje con el hueso y una superficie (15) para hacer frente al componente coincidente de la articulación, definiendo la superficie un taladro (16) ahusado que presenta una superficie ahusada sustancialmente uniforme, un componente de cabeza que incluye una superficie (19) de soporte para su articulación con el componente coincidente de la articulación, y un elemento (130) de montaje que incluye una porción (33) proximal configurada para su encaje con el componente de cabeza y que, así mismo, incluye una porción (134) de articulación sustancialmente maciza que define una superficie de soporte esferoidal con el tamaño preciso para
