Prosthesis with flexible intramedullary stem

Details Prosthesis with flexible intramedullary stem Prosthesis with flexible intramedullary stem

1992-01-03

1994-05-31

Isabella, David

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

Implantable prosthesis

Bone

A61F 232

Patent

active

053165500

ABSTRACT:
An implant for a hip or other joint is provided. Briefly stated, a intramedullary stem is provided having flexibility which is comparable to that of the surrounding bone. A bore is disposed in the stem portion with the stem wall thickness uniform or varying from the proximal end to the distal end, depending upon the amount of flexibility desired. This flexibility therefore distributes the loading forces from the joint more uniformly over the supporting cortical bone with the result that bone degeneration from stress shielding is minimized or eliminated.

REFERENCES:
patent: 2066962 (1937-01-01), Cross
patent: 3846846 (1974-11-01), Fisher
patent: 4080666 (1978-03-01), Fixel
patent: 4287617 (1981-09-01), Tornier
patent: 4520511 (1985-06-01), Gianezio et al.
patent: 4570271 (1986-01-01), Sump
patent: 4599085 (1986-07-01), Riess et al.
patent: 4636219 (1987-01-01), Pratt et al.
patent: 4904266 (1990-02-01), Barber
patent: 4919666 (1990-04-01), Buchhorn et al.
patent: 4950295 (1990-08-01), Weigum et al.

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