Thumb joint prosthesis and related method of implantation
US5702469A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Jan 18, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00029
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A trapezium-metacarpal thumb joint prosthesis having a metacarpal component for insertion into a metacarpal bone of a human thumb and a trapezium component for insertion into a trapezium bone of a human thumb. The metacarpal component has a forward end of generally truncated hemispherical shape with a convex surface and a rear end having a base and a stem. The trapezium component has a forward end of a generally cylindrical shape with a concave surface with a radially built up shoulder and a rear end having a base and a stem. The concave surface is adapted for non-captive rotational abutment with the convex surface. Also, a related method for implantation of the prosthesis into the metacarpal and trapezium bones of a human thumb, wherein the two components are respectively inserted into a pre-cut void in each of the respective bones from a direction above the radial side of the thumb substantially transverse to the longitudinal axis of each respective bone of the thumb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.