Hip prosthesis
AssigneesGMT Gesellschaft fur Medizinische Technik mbH, Waldemar Link GmbH & Co. KG
InventorsElmar Nieder, Arnold Keller
Life of this patent
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Abstract
A hip prosthesis wherein a saddle-shaped head has a seat flanked by two horns and engageable with the surface bounding a recess in the lower part of a damaged pelvic bone. The head is rotatably or rigidly secured to a substantially S-shaped adapter which, in turn, is rotatably or non-rotatably secured to the adjacent end of a shank that is implantable in the cavity of a femur. One or more distancing rings can be inserted between the adapter and the head.
Claims88
An implantable hip prosthesis for use between a pelvic bone which has an opening or a recess at its underside and a femur which has an upper end with a downwardly extending cavity, comprising a saddle-like head having two horns and a seat between the horns, said head being engageable with the pelvic bone so that the opening or the recess of the pelvic bone is adjacent the seat and is flanked by the horns of the head, and said head having surfaces which permit movement relative to the pelvic bone about a first predetermined axis which extends transverse to said seat and about a second predetermined axis which is substantially normal to said first predetermined axis;
- a shank which is implantable into the cavity of the femur;
- and connecting means for connecting said head to said shank, said connecting means including coupling means defining a pivot axis which substantially coincides with said first predetermined axis so as to permit turning of said head relative to said shank about said first predetermined axis.
Dependencies are inferred from the claim text.