Abstract: A modular assembly for a femoral prosthesis comprises a femoral prosthetic implant forming a spindle of elongate and tapered shape and a one-piece neck. The implant consists of a diaphyseal lower part and a metaphyseal upper part having a flat face delimited by an outer edge and in which a cavity is formed. The neck is formed of a tenon having a shape corresponding to the cavity, said tenon being fitted into the cavity along an insertion axis YY perpendicular to the flat face and a rod provided with an interface for fixing a cup that is to be inserted into the acetabulum of the hip bone. The rod is provided with a tongue which protrudes parallel to the flat face in a radial direction with respect to the insertion axis and directed towards the interior of the obtuse salient angle, at a distance from the flat face of between 0.3 mm and 1.

Abstract: The object of the present invention is a joint prosthesis for a human body including: a spherical head (1), an intermediate semi-spherical shell (2) in which the spherical head (1) is accommodated with a first clearance, a safety retaining ring (3), retaining the spherical head (1) in the intermediate shell (2), and an external shell (4) provided with a concave internal wall having the shape of a spherical cap, wherein the intermediate shell (2) is housed with a second clearance, with the concave internal wall having a local cavity (42) providing a storage for the lubricating liquid.

Abstract: A hip prosthesis has a shaft which is implantable in the femur, a ball head anchored on the shaft, a socket in which the ball head is movably supported, and a bipolar shell placed between the ball head and the socket, whereby the ball head rotates in the bipolar shell and the bipolar shell rotates in the socket.

Abstract: The invention relates to a hip prosthesis having a shaft (1) which is implantable in the femur, and having a ball head (2) anchored on the shaft (1) by a conical clamp, for example, and having a socket (5) in which the ball head (2) is movably supported.