Extramedullary femoral head-neck prosthesis and method of implan

Details Extramedullary femoral head-neck prosthesis and method of implan Extramedullary femoral head-neck prosthesis and method of implan

1987-01-09

1989-01-03

Apley, Richard J.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

128 92YL, 128 92YK, A61F 236, A61F 509

Patent

active

047954736

ABSTRACT:
An extramedullary femoral head-neck prosthesis for implantation 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. The prosthesis comprises a sideplate and screws for securing the sideplate to the lateral side of the femoral shaft. A barrel extends obliquely upwardly from the sideplate and has an open upper end. The barrel is adapted to be inserted in a bore extending obliquely upwardly through the femoral shaft from the lateral side of the shaft to the femoral neck. The prosthesis also includes a ball assembly comprising a ball stem adapted to be inserted coaxially into the barrel through the open upper end of the barrel and to be slideably received therein, a neck at the upper end of the stem adapted for face-to-face engagement with the femoral neck, and a ball on the neck. The ball stem is sized for a relatively close clearance fit in the barrel. The ball stem is retained and held against upward movement in the barrel so that the neck of the ball assembly presses against and compresses the femoral neck. A method of implanting such a prosthesis is also disclosed.

REFERENCES:
patent: 4129903 (1978-12-01), Huggler

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