Tibial prosthesis
US5609641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1995 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Jan 31, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2230/0015
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A tibial prosthesis includes a tibial tray and a post extending therefrom for receiving one or more modular stems of differing sizes. The stem provides a closed socket that registers with the post. A wedge lock fit tightens the stem to the post upon assembly. The stem has a cylindrical section and a tapering section. Fins extend longitudinally from the proximal end to the distal end of the stem, tracking both the cylindrical and tapering portion thereof so that each of the fins tracks a uniform diameter section of the stem for a majority of its length. The tapering section of the stem is equal to about one third of its over all length, and defines the distal end of the stem. The fins are longitudinally placed about the stem exterior surface, and are generally parallel. Between the fins are U-shaped channels that are similarly longitudinally extending and generally parallel. The stem provides a central longitudinal axis. The fins and channels are parallel to the central longitudinal axis of the stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.