Constrained prosthesis for replacement of joints between long bones in the hand
US5938700A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1998 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Feb 11, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00982
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A joint prosthesis for replacing a joint between two elongated bones of the hand. A first member is provided with an elongated stem for reception in one of the elongated bones and includes a head remote from the stem, the head having a central arcuate dovetail rib arising from a spheroidal convex articulating surface. A second member has a stem for reception in the other bone and a base remote from the stem, the base having a central arcuate dovetail slot formed in a spheroidal concave surface shaped to articulate with the convex articular surface. The central arcuate dovetail rib of the first member and arcuate dovetail slot of the second member are assembled to fully engage and articulate with each other to restrain separation of the members at all degrees of flexion ranging from 0 degrees extension through to 110 degrees of flexion, the force between the members being borne primarily by said spheroidal articular surfaces throughout the range of motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.