Artificial hip-joint with detachable insert

Claim 1

An artificial hip-joint for use in a patient''s body, comprising: a first endoprosthesis means of the patient''s acetabulum, having an exterior surface for impacting in the bony tissue of the patient''s pelvis, and a seat portion; a second endoprosthesis means of the proximal end of the patient''s femur hinged to said first endoprosthesis means; a head member of said second endoprosthesis means having a spherical outer surface; a neck portion of said second endoprosthesis means rigidly connected with said head member; a pin of said second endoprosthesis means rigidly connected with said neck portion for introducing into the medullary canal of the patient''s femur; an insert member installed intermediate the surface of said seat portion and the exterior spherical surface of said head member, which insert member provides for a hinged connection of said first and second endoprosthesis means and has an interior spherical surface interacting with the spherical surface of said head member, whereof the cavity defined by said interior spherical surface is greater than the radius, but smaller than the diameter, of said head member, said insert member having cutouts in the distal portion thereof to form a plurality of blades disposed between said cut-outs comprising a collet enveloping said head member; a self-locking nut operatively associated with said insert member for screwably fixing said insert member in said seat portion.