PROXIMAL INTERPHALANGEAL JOINT PROTHESIS

摘要

An interphalangeal prosthesis (10) includes a mobile element (12), a proximal fixation element (22), and a distal fixation element (24). The mobile element (12) includes a proximal portion (42, 62, 94) and a distal portion (43, 64, 92), and the proximal portion includes three proximal mobile coupling contiguous surfaces (46, 48, 50) and a proximal mobile coupling protrusion (52), and the distal portion includes a distal coupling mobile surface (54) and a distal mobile coupling protrusion (56), and the proximal portion and the distal portion move relative to each other primarily in an axis of rotation perpendicular to a plane that extends through the proximal mobile coupling protrusion, the three proximal mobile coupling contiguous surfaces, the distal coupling mobile surface, and the distal mobile coupling protrusion in an implanted configuration. The proximal fixation element (22) couples to the three proximal mobile coupling contiguous surfaces and the proximal mobile coupling protrusion of proximal portion, and couples to a joint bone surface and a bone canal. The distal fixation element (24) couples to the distal coupling mobile surface and the distal mobile coupling protrusion, and couples to an opposing joint bone surface and a second bone canal.

主权项

1. An interphalangeal prosthesis, comprising:
a mobile element which includes a proximal portion and a distal portion, and the proximal portion includes three proximal mobile coupling contiguous surfaces and a proximal mobile coupling protrusion, and the distal portion includes a distal coupling mobile surface and a distal mobile coupling protrusion, and the proximal portion and the distal portion are configured to move relative to each other primarily in an axis of rotation perpendicular to a plane that extends through the proximal mobile coupling protrusion, the three proximal mobile coupling contiguous surfaces, distal coupling mobile surface, and the distal mobile coupling protrusion in an implanted configuration; a proximal fixation element which couples to the three proximal mobile coupling contiguous surfaces and the proximal mobile coupling protrusion of proximal portion, and is configured to couple to a joint bone surface and a bone canal; and a distal fixation element which couples to the distal coupling mobile surface and the distal mobile coupling protrusion, and is configured to couple to an opposing joint bone surface and a second bone canal.