Total prosthesis of the wrist
US5314485A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Sep 11, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00011
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A total wrist prosthesis with a radio-carpal articular level having a first radio-ulnar center of rotation located in a frontal plane and a medio-carpal articular level having a second radio-ulnar center of rotation located also in the frontal plane but being distinct from the first radio-ulnar center of rotation. The prosthesis including a radial element having an anchoring shank insertable into the distal portion of a radius bone, and a shoulder resting against the distal face of the said radius bone. A plate is connected to the radial element having a concave bearing surface having a radio-ulnar deviation radius of curvature in the frontal plane and a flexion-extension radius of curvature in a sagittal plane smaller than the radio-ulnar deviation radius of curvature. An intermediate element is also provided rotatable in radio-ulnar deviation and in flexion-extension with respect to the concave bearing surface and having a shape so as to cooperate with the concave bearing surface, and including a recess offset dorsally and in an ulnar direction. A metacarpal element is provided for anchoring into metacarpal bones and is free to rotate solely in a radio-ulnar deviation movement wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.