Patent · US Expired

Endoprosthesis for the femoral part of a hip joint

US5167666A · kind A · utility

42Cited by

5References

8Claims

0Family size

Assignee

Kernforschungszentrum Karlsruhe GmbH · DE

Inventors

Claus Mattheck · Leimersheim, DE
Martin Borner · Schwalbach, DE

Key dates

Filing date	May 10, 1989
Grant date	Dec 1, 1992
Priority date	—
Expiry date	May 10, 2009

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2230/0069
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

An endoprosthesis for a femoral hip joint comprises a stem (1) with a collar (3) which bears against a resected bone surface and has a blocking cone (4) on which the ball head (5) is positioned. A screw (12) which grips the prosthesis as a tensioning stay passes through a lateral bore extending obliquely downward and outward through the femur. The prosthesis stem is designed to permit cementless fixation and to prevent crack formation in the femur due to rigidity of the stem, even under extreme loads. To this end, the prosthesis stem (1) is lodged in a mating fit in a medullary nail (7) driven into the medullary canal, and the distal region of the prosthesis stem (1) is elastic.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.