A device for fixing a emerge, and in particular a glenoid emerge behind

摘要

The fixing consists of a metal plate (2) with one or more anchoring bushes (2b). Each bush has a solid cylindrical base (2f) and three or more lengthwise slits (2e) dividing it into an equivalent number of vanes (2d). The vanes are expanded outwards by the pressure of a nut (5) when a screw (4) with a pointed tip (4a) is driven into the other side of the plate. The nut has two truncated conical faces (5a, 5b), one of which (5a) coincides with the angle of taper of the tip (4a) of the screw while the other (5b) is shaped to match the divergent ends of the vanes and has projecting lugs (5c) to engage with the slits between the vanes. The other side of the metal plate receives a clip-on plastics or ceramic insert (3) which acts as the articulated joint surface.