US 6,183,519 B2Granted

Ankle prosthesis

AssigneeTornier SAS

InventorsMichel Bonnin, Jean-Alain Colombier, Thierry Judet, Alain Tornier

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Abstract

An ankle prosthesis, comprising a tibial element and an talar element (30), each provided with anchoring means on the lower extremity of a tibia and on the astragalus, respectively, and each delimiting an articular surface, both articular surfaces being shaped in order to interact as a whole and to provide a relative movement between the two tibial and talar elements around at last one axis. It is especially characterized by the fact that, taking as reference direction the direction of the axis of the tibia on which it is intended to anchor the tibial element, seen in projection on a plane approximately perpendicular to this reference direction, the articular surfaces are curved with a concavity towards the inside of the foot onto which is to be anchored the talar element.

Claims15

Dependent claims

An ankle prostheses comprising;

a
tibial element having an inner side adapted to be positioned toward the inside of a foot and an outer portion adapted to be oriented toward a lower portion of an outer fibula and a talar element having an inner side adapted to be positioned toward the inside of a foot and an outer portion adapted to be positioned toward the lower portion of the outer fibula, said tibial element including means for anchoring to a tibia and said talar element including means for anchoring to an astragalus, said tibial element including a lower articular surface which cooperatively engages an upper articular surface of said talar element, and each of said lower articular surface and upper articular surface being concavely curved toward the inside of a foot and thus toward said inner sides of said tibial element and said talar element, respectively, from a front of each of said tibial element and said talar element to a rear of said tibial element and said talar element.

Dependencies are inferred from the claim text.

Facts

Application: 09/036,682Filed 9 Mar 1998
Priority: FR 97 0304010 Mar 1997
Granted: 6 Feb 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61F 2/4202
For wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes: for ankles
A61F 2002/30235
Cylindrical: tubular, e.g. sleeves
A61F 2002/30369
With possibility of relative movement between the protrusion and the recess: limited lateral translation of the protrusion within a larger recess
A61F 2002/30574
Special structural features of bone or joint prostheses not otherwise provided for: with an integral complete or partial collar or flange