Femoral component of a knee prosthetic including three curvature radii
US6540787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Jan 31, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/3859
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A femoral part of a knee prosthetic of the type known as comprising three compartments, including two condyles (2) and a trochlea surface part (3) wherein the femoral part is to be anchored to the distal extremity of a femur and the external surface of the condyles is to co-operate with the upper external surface of a tibia insert such that, in a longitudinal section, the trochlea support surface (3) defines a trochlean trajectory following a first circular arc and, still in a longitudinal section, the external surface of the condyles (2) includes at least partially an intermediary circular arc (5), characterised in that in a longitudinal section, the external surface of the condyles (2) comprises an intermediary surface (5) and an extremity surface (6) both of which are a circular arc, with the intermediary circular arc (5) extending over an angle of 80° to 90°, the extremity circular arc (6) extending over an angle of 40° to 50°, the value of the curvature radius of the extremity arc (6) being strictly less than the value of the curvature radius of the intermediary arc (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.