Adjustable hip-joint endoprosthesis

Patent 6083263 Issued on July 4, 2000. Estimated Expiration Date:

April 8, 2017. 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

Total prosthesis of the hip
Patent #: 4051559
Issued on: 10/04/1977
Inventor: Pifferi

Modular hip joint prosthesis with adjustable anteversion
Patent #: 5002581
Issued on: 03/26/1991
Inventor: Paxson, et al.

Adjustable hip joint endoprosthesis Patent #: 5336268
Issued on: 08/09/1994
Inventor: Rispeter

Inventors

Application

No. 833688 filed on 04/08/1997

US Classes:

623/22.46Including protruding means projects into a bore in femoral stem or neck

Examiners

Primary: Milano, Michael J.

Attorney, Agent or Firm

Kinney & Lange, P.A.

Foreign Patent References

0 339 530 EP. 11/12/1989
0 393 608 A3 EP. 10/12/1990
2 575 383 FR. 07/12/1986
2 578 738 FR. 09/12/1986
2 605 514 FR. 04/12/1988
WO 90/02533 DE. 03/12/1990
9002533 WO 03/12/1990

International Class

A61F 002/36

Foreign Application Priority Data

1991-08-23 DE

Abstract

A hip-joint endoprosthesis is provided which has a prosthesis head (5) that can be medio-laterally displaced parallel to a tangent that rests on the lateral edge of the proximal femoral infundibulum of the hip-joint (b) and contacts the inner contour of the curved neck of the femur (b'). This hip-joint endoprosthesis allows the centre of rotation of the hip-joint to be reproducibly adjusted by means of an adjustable head (5). Toothings (12, 13, 15, 16) ensure a (fine) stepped adjustability of the displacement in the medio-lateral direction (B--B') and of the rotation around an axis (A--A) that is perpendicular to the plane of displacement (B--B'). Securing is allowed by a single screw (10) that braces the engaged toothings (12, 13, 15, 16) against each other. The height of the joint ball (6) mounted on the prosthesis head (5) via a cone (17) can be adjusted by joint balls (6) having pressed-in cones of varying depths.