Biomechanical great toe implant

Patent 5326366 Issued on July 5, 1994. Estimated Expiration Date:

February 16, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3891998

Great (large) toe prosthesis and method of implanting
Patent #: 4156296
Issued on: 05/29/1979
Inventor: Johnson , et al.

Semi-constrained artificial joint
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Issued on: 01/06/1987
Inventor: Noiles

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Issued on: 02/10/1987
Inventor: Steffee

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Issued on: 02/24/1987
Inventor: Swanson

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Patent #: 4685919
Issued on: 08/11/1987
Inventor: Niwa , et al.

Metatarsal-phalangeal prosthesis
Patent #: 4731087
Issued on: 03/15/1988
Inventor: Sculco , et al.

Tibial implant for a knee prosthesis
Patent #: 4769039
Issued on: 09/06/1988
Inventor: Horber

Toe implant
Patent #: 4908031
Issued on: 03/13/1990
Inventor: Frisch

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Patent #: 5011496
Issued on: 04/30/1991
Inventor: Forte, et al.

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Inventors

Application

No. 017569 filed on 02/16/1993

US Classes:

623/21.19Toe bone

Examiners

Primary: Green, Randall L.
Assistant: Willse, D.

Foreign Patent References

0198586 EP 10/13/1986
2605878 FR 05/13/1988
2645735 FR 10/13/1990
2651119 FR 03/13/1991

International Class

A61F 002/42

Abstract

A prosthetic implant for resurfacing a damaged base portion of the proximal phalanx in a human great toe comprises a base fabricated from a titanium, ceramic or other durable and rigid biocompatible material. The base is generally elliptical and includes an anatomically-shaped proximal articular surface having an enlarged build-up on the lateral end thereof. The base also includes a generally planar distal seating surface disposed for engaging the sectioned portion of the proximal phalanx. An elongated stem extends distally from the seating surface of the base and includes an array of fins together having a cruciate-shaped cross section. The fins each include a plurality of serrations along their sloping edges for anchoring the stem within the cancellous portion of the proximal phalanx.