Anchoring device for knee prosthesis

Claim 2

An anchoring device for a knee prosthesis of the unicompartmental or bicompartmental type, the prosthesis including a tibial plateau having a tibial bearing face provided with anchoring grooves of a dovetailed profile forming a grid pattern, comprising an anchoring crosspiece having proximal and distal ends, the distal end of the crosspiece adapted to be inserted in a tibia, and the proximal end of the crosspiece including a stud adapted to fit in one of the grooves in the tibial bearing face, and a plurality of plane wings intersecting along an axis extending from the stud to the distal end.

Claim 3

An anchoring device according to claim 1, wherein the plane wings are provided with openings.

Claim 4

An anchoring device according to claim 1, wherein the plane wings of the crossspiece have slightly bevelled edges nd lateral cants narrowing towards the distal end.

Claim 5

An anchoring device according to claim 1, including a cylindrical bore defined at the intersection of the plane wings.

Claim 6

An anchoring device according to claim 1, wherein the plane wings are arranged to be perpendicular to the tibial bearing face.

Claim 7

An anchoring device for a prosthesis to be installed in a bone, the anchoring device having a distal end adapted to be inserted into the bone and a proximal end, comprising: a stud defined at the proximal end, the stud being shaped to engage the prosthesis; a central member extending from the stud to the distal end; and a plurality of plane wings extending from the central member such that the central member forms a planar intersection of the plane wings, the plane wings being adapted to engage the interior structure of the bone.

Claim 8

An anchoring device for a prosthesis to be installed in a bone, the anchoring device having a distal end adapted to be inserted into the bone and a proximal end, comprising: a stud defined at the proximal end, the stud being shaped to engage the prosthesis; a central member extending from the stud to the distal end; and a plurality of plane wings extending from the central member such that the central member forms a planar intersection of the plane wings, the plane wings being adapted to engage the interior structure of the bone.

Claim 9

An anchoring device according to claim 6, wherein four plane wings are arranged in a cross.

Claim 10

An anchoring device according to claim 6, further including a plurality of openings defined in at least one of the plane wings.

Claim 11

An anchoring device according to claim 6, further including a bore extending through the stud and the central member.

Claim 12

An anchoring device according to claim 6, wherein at least one of the plane wings includes at least one bevelled edge.

Claim 13

An anchoring device according to claim 6, wherein the plane wings are narrower toward the distal end than toward the proximal end.

Claim 14

An anchoring device according to claim 6, wherein the stud is shaped to be complementary to a dovetailed groove.

Claim 15

An anchoring device according to claim 12, wherein the stud is elongated in a direction perpendicular to the central member.

Claim 16

A prosthesis adapted to be installed in a bone, comprising: a plateau member, adapted to be disposed generally on a surface of the bone and having a bearing surface for contact with the bone, the bearing surface having defined therein at least one groove having a dovetailed profile; and an anchoring device, having a distal end adapted to be inserted into the bone and a proximal end, including: (a) a stud defined at the proximal end, the stud being shaped to be complementary to at least one groove in the bearing surface of the plateau member, (b) a central member, extending from the stud toward the distal end, and (c) a plurality of plane wings extending from the central member such that the central member forms a planar intersection of the wings, the plane wings being adapted to engage the structure of the bone.

Claim 17

A prosthesis adapted to be installed in a bone, comprising: a plateau member, adapted to be disposed generally on a surface of the bone and having a bearing surface for contact with the bone, the bearing surface having defined therein at least one groove having a dovetailed profile; and an anchoring device, having a distal end adapted to be inserted into the bone and a proximal end, including: (a) a stud defined at the proximal end, the stud being shaped to be complementary to at least one groove in the bearing surface of the plateau member, (b) a central member, extending from the stud toward the distal end, and (c) a plurality of plane wings extending from the central member such that the central member forms a planar intersection of the wings, the plane wings being adapted to engage the structure of the bone.

Claim 18

A prosthesis according to claim 14, wherein the plane wings are disposed perpendicular to the bearing surface.

Claim 19

A prosthesis according to claim 14, further including a plurality of openings defined in at least one of the plane wings.

Claim 20

A prosthesis according to claim 14, further including a bore extending through the stud and the central member of the anchoring device.

Claim 21

A prosthesis according to claim 14, wherein the plane wings of the anchoring device include at least one bevelled edge.

Claim 22

A prosthesis according to claim 14, wherein the plane wings of the anchoring device are narrower at the distal end than toward the proximal end.

Claim 23

A prosthesis according to claim 14, wherein the stud of the anchoring device is elongated in a direction perpendicular to the central member.