Prosthesis device for human articulations, in particular for the ankle articulation
US6926739B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | May 12, 2000 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | May 12, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00011
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prosthesis device (1) for correct replacing of the articular surfaces of the human ankle joint comprises: a first component (2) having a spherical convex articular bearing surface (5); a second component (3) having a bearing surface (6) which has a convex shape in the frontal plane, and concave sulcus in the frontal plane; and a third component (4) located between said first and second components (2, 3) and having two surfaces (7, 8) which are complementary to and engage the upper convex and the lower concave sulcus surfaces (5, 6) to be fully congruent with the components (2, 3). The three components (2, 3, 4) can be designed from the subject-specific geometry of the ligaments (9, 10). The device (1) can move under natural muscular and ligamentous control, closely restoring that of a natural joint and maintaining uniform load distribution. A prosthesis device (1) implanted according to a stated method of ensuring equal dorsi- and plantar-flexion gaps between first (2) and second (3) components, is a part of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.