Tibial prosthesis with polymeric liner and liner insertion/removal instrument
US5702463A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Feb 20, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2220/0025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A tibial prosthesis apparatus and its insertion/removal tool includes a tibial tray that receives a polymeric tray liner with an articulating surface. Dovetail connections are provided for interconnecting the liner and the tibial tray. An instrument is provided that can either insert or remove the liner relative to the tray. The surgeon is provided with cam and hook portions that are at the hooking end of the instrument opposite the lever end. The cam engages the anterior surface of the liner while the hook attaches to the tibial tray and the lever end is rotated to cam the insert into a locked position during insertion. The hook engages the distal side of the liner so that the surgeon can rotate the instrument to disengage or remove the liner from the tray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.