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Method of implanting extramedullary femoral head-neck prosthesis

  • US 4,998,937 A
  • Filed: 12/20/1989
  • Issued: 03/12/1991
  • Est. Priority Date: 01/09/1987
  • Status: Expired due to Term
First Claim
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1. A method of implanting an extramedullary femoral head-neck prosthesis in a femur, the latter having a shaft and a neck at the upper end of the shaft at the medial side of the femur, comprising:

  • determining the axis of the medial trabecular stream of the femur;

    cutting the neck of the femur to form a seat on the femur neck;

    drilling a bore through the shaft of the femur to extend from the neck of the femur down to the lateral side of the shaft along a line substantially parallel to the axis of the medial trabecular stream;

    inserting a barrel having an open end into said bore with the open end of the barrel facing upwardly;

    securing said barrel in fixed position in the bore; and

    inserting a stem of a ball assembly coaxially into said barrel to bring a surface of the ball assembly into congruent, face-to-face engagement with said seat on the femur neck.

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