Metacarpal rod anchor for a trapezometacarpal prosthesis

摘要

In one embodiment, the present invention is an anchoring rod that is elongated and tapered, the rod extends from a distal end toward a proximal end, the shape including a palmate side, a dorsal side and lateral sides, is the shape being flared on its palmate side without flaring on its dorsal side and flares on its lateral sides so as to form a flared proximal portion, said flared proximal portion having a substantially trapezoidal cross-section, with a dorsal face larger than the palmate face.

主权项

1. A metacarpal anchoring rod, particularly for a trapezo-metacarpal prosthesis, comprising an elongated and tapered shape extending from a distal end toward a proximal end, the shape including a palmate side, a dorsal side and lateral sides, the shape being flared on its palmate side without flaring on its dorsal side and flares on its lateral sides so as to form a flared proximal portion, said flared proximal portion having a substantially trapezoidal cross-section, with a dorsal face larger than the palmate face, wherein the lateral faces include grooves formed within the lateral faces, each groove delimiting, on its side turned toward said distal end, a steep wall flank, generally perpendicular to a longitudinal axis of the anchoring rod and, on its side turned toward said proximal end, an inclined wall flank; wherein a distal portion includes a boss with a rounded shape positioned on the palmate side.