Key lock, particularly for fractures of the proximal femur.

摘要

Locking nail, particularly for fractures of the proximal femur, in which the proximal section of the nail hole extending preferably inclined to the axis of the proximal portion for receiving a screw or a bolt is provided, particularly a pin femoral neck, wherein the edge of an inlet end (54) has a bevel (60) perimeter or inclined surface whose shape and path is formed such that with the aid of a circular tool milling (56 ) rotating about an axis perpendicular to the axis of the proximal section (12) and having an outer diameter greater than the diameter of the hole (18), which moves in an approximately centered against the inlet end against the edge ( 52) the inlet end (54) approximately perpendicular to the axis of the proximal section (50) of the nail until it has generated the bezel (60) perimetral.