Metal/composite hybrid orthopedic implants
AssigneeDepuy Dupont Orthopaedics
InventorsDavid C. Kelman, Joseph D. Trentacosta
Life of this patent
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Abstract
Metal/Composite hybrid orthopedic implants are disclosed that are useful prosthetic devices. The hybrid implant comprises an intraosseous metal portion and an intraosseous composite portion. The composite portion is comprised of filaments nonlinearly disposed to produce a structure of variable modulus along its length. Also disclosed are a variety of means to secure the metal portion to the composite portion. The method of making the various implants is also disclosed.
Claims13
An orthopedic device adapted for implantation within a body, the device comprising:
- an intraosseous metal portion;
- and
- an intraosseous composite portion of one or more layers and comprising (i) a first extension having a modulus and that is received within said metal portion and secured thereto and (ii) a second extension positioned outside said metal portion;
- said composite portion having a length and comprising one or more filaments disposed about a longitudinal axis by winding or braiding each filament along said length at winding or braiding angles with respect to the longitudinal axis selected to provide the second extension with a modulus that is less than the modulus of the first extension, the winding or braiding angle in some of the layers of the first extension being less than the winding or braiding angle in the same layers of the second extension, said filaments further being disposed within a polymer matrix.
An orthopedic device adapted for implantation within a body, the device comprising:
- an intraosseous metal portion;
- an intraosseous composite portion of one or more layers and comprising a first extension having a modulus and that is received within said metal position and secured thereto and a second extension positioned outside said metal portion;
- and
- an intraosseous metal insert interposed there between and connecting said metal portion to said composite portion,
- said metal insert being received within said metal portion and frictionally secured thereto, said metal insert further forming a taper such that the cross-sectional area of said metal insert increases from a first end received within said metal portion and a second end connected to said composite portion, said metal insert further being connected to said composite portion by an adhesive joint or a shrink fit joint,
- said composite portion having a length and comprising one or more filaments disposed about a longitudinal axis by winding or braiding the filaments at winding or braiding angles with respect to the longitudinal axis selected to provide the second extension with a modulus that is less than the modulus of the first extension the winding or braiding angles in some of the layers of the first extension being less than the winding or braiding angle in the same layers of the second extension, said filaments further being disposed within a polymer matrix;
- and
- said intraosseous metal portion and said intraosseous composite portion adapted to contact the body.
Dependencies are inferred from the claim text.