Femoral hip prosthesis
US4608053A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1983 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Apr 29, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00023
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A femoral hip joint prosthesis with a stem (6) which is intended for anchorage without cement in the femur (1) and the proximal end section of which, in order to substantially fill the spongy part of the femur, is greatly thickened in the trochanteric region (14) thereof, as compared with its distal section (12), comprises a thickening which is made in the form of a plurality of longitudinal ribs (15) which project from a slender stem core (17) on the dorsal and ventral sides thereof and which face the medial side with a broad surface and have a multiplicity of perforations (20) which are substantially closed towards the ridge (18) of the rib. As a result, the conditions for the transmission of forces to the bone tissue in the proximal end section of the prosthesis stem are improved, it being possible at the same time to exert a favorable influence on the elasticity of the stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.