Patent ID: 8821503

Claim:
An ancillary tool for positioning and seating a prosthetic acetabulum in an anatomical or prosthetic cavity of a patient's hip, the tool comprising an endpiece and a handle adapted to manipulate the acetabulum, the endpiece comprising an elastically deformable ring including a plurality of petals, the handle including a rod and a head, the tool having a first configuration in which the head is coupled with the rod and disengaged from the elastically deformable ring permitting the petals to elastically contract with respect to a longitudinal axis of said endpiece and a second configuration in which the head is coupled with the rod and is received in the elastically deformable ring, the petals of the elastically deformable ring including outer surfaces adapted to wedge against the inner surface of the acetabulum and opposite inner surfaces adapted to interact said endpiece with said handle when the tool is in the second configuration, wherein said endpiece includes a supple part and a rigid part secured to the supple part, wherein the rigid part includes structure for removably securing the rod to the endpiece and wherein said handle further includes elements for applying a first force to urge said head into cooperative engagement with said inner surfaces of said petals of the elastically deformable ring in the second configuration to thereby radially expand said petals of the elastically deformable ring with respect to the longitudinal axis of said endpiece, wherein said elements include a threaded portion on the rod, a grip screwed on the threaded portion and a movable sleeve fitted between the grip and the head.