Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1988-11-25
1990-01-23
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
606 64, A61F 232, A61F 504
Patent
active
048955728
ABSTRACT:
The present invention relates to a new and improved design for a device utilized as an interlocking femoral prosthesis under medical circumstances wherein either the femoral bone is fractured or there exists total hip failure requiring a hip replacement. By having the interlocking femoral prosthesis device be of an overall length, as in the case of a fracture, such that the lower portion of said device extends below the point of fracture of said femur and by utilizing three surgical screws for securing the interlocking femoral prosthesis within the femur canal, two of said screws passing distally through two elliptical holes formed within the interlocking femoral prosthesis, same being located below the fracture line of said femur when said device is implanted as related to a fracture situation and one of said screws passing proximally through one circular hole formed within the interlocking femoral prosthesis, at its upper portion which is positioned as in the case of a fracture, above the location of said fracture, when said device is implanted as related to a fracture situation, there is achieved the overall objects and advantages of the invention. Additionally, by having that portion of the device that is adjacent to the upper circular hole formed therein by of a porous construction, there is further achieved additional means for said device to anchor itself during the healing process to the femoral bone.
REFERENCES:
patent: 3922726 (1975-12-01), Trentani et al.
patent: 3995323 (1976-12-01), Shersher
patent: 4080666 (1978-03-01), Fixel
patent: 4608052 (1986-08-01), Van Kampen et al.
patent: 4705027 (1987-11-01), Klaue
patent: 4776330 (1988-10-01), Chapmann et al.
Apley Richard J.
Isabella David J.
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