Prosthetic hip-replacement implant assembly comprises head and mobile neck for easily releasable coupling

摘要

The assembly (1) comprises a head (2) with a frusto-conical cavity (2t) for accepting the frusto-conical section (3t) of a neck (3). The flat end (3e) of the neck section has a coaxial cylindrical projection (4) while the cavity has a coaxial cylindrical extension (5) with an annular projection (6) extending from the side walls for producing a slight interference with neck projection. The height of the extension is greater than or equal to the height of the neck projection which when fully inserted causes the end to abut a shoulder (7) around the extension, coupling the head and neck parts.