hip prosthesis attached to tightness

The prosthesis according to the invention for forming the male part of the joint of the femur, comprises a head (1) connected by a neck (2) to a rod (3). In the transition area (4) between the extra bone part and the intra-osseous part prosthesis, an annular surface is carried out (5) in a rehabitable porous material, allowing the natural formation of a fibrous seal between upper end of the femur and said annular surface (5), opposing the penetration of foreign bodies between the bone and the rod (3) prosthesis. Thus significantly reduces the risk of osteolysis.