Patent ID: 8535324

Claim:
A prosthetic acetabular cup inserter and impactor comprising an expandable annular cup engaging element to engage an inner surface of a cup to be inserted, expander means for expanding the cup engaging element which is connected to one end of a handle via a hollow or partly hollow extension portion, an other end of said handle is provided with an anvil, an elongate operating means located within said hollow or partly hollow extension portion and connected to said cup engaging element, and means for moving said elongate operating means to pull said cup engaging element towards the expander means in which said elongate operating means has a screw threaded end portion to engage a threaded retainer located in said cup engaging element, in which anti-rotation means are provided to prevent said cup engaging element rotating in relation to the expander means, extension portion and handle, and wherein the anti-rotation means comprises a star wheel attached to said expander means and engaging in slots in said cup engaging element.