Canine hip prosthesis

Details Canine hip prosthesis Canine hip prosthesis

1990-02-16

1991-09-10

Isabella, David J.

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

Implantable prosthesis

Bone

A61F 230

Patent

active

050470566

ABSTRACT:
A canine hip prosthesis with a porous coating for bone ingrowth is disclosed. The femoral prosthesis generally comprises a stem for insertion into the intramedullary canal of a canine femur which stem is divided into a proximal portion and a longer distal portion. The stem exhibits a compound curvature along its length, including a slight posterior bow, which provides the prosthesis with a glove-like fit in the prepared intramedullary canal of the canine femur. Provided on the proximal portion of the stem is a porous coating which generally comprises two layers of ball-shaped metallic particles bonded together at their points of contact, e.g. by sintering, which define between themselves a plurality of connected interstitial pores. The size of the particles is from -30 to +35 U.S. Standard mesh size, and the pore size is between about 0.014 and 0.020 inches. The porous coating described provides superior resistance to failure at the coating-substrate and coating-bone interfaces, without weakening the prosthesis. The porous coating disclosed is also suitable for use in other canine bone prostheses.

REFERENCES:
patent: 3855638 (1974-12-01), Pilliar
patent: 4550448 (1985-11-01), Kenna
patent: 4589883 (1986-05-01), Kenna
patent: 4666450 (1987-05-01), Kenna
The Richards Canine II Total Hip Replacement System Catalogue.
Mathyes Catalogue.
Benner,DVM, (Jul. 1987) pp. 30 and 52.

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