Abstract: An implant has an implant member which is implantable in a bone material and has an axial threaded bore at one end which receives a threaded element which may be an implant post, an implant extension or a post for attachment by means of a screw connection. The threaded element has a head with a diameter greater than an outer diameter of the implant member adjacent the one end and the head has a pressing surface extending substantially at right angles to the axis of the implant member and beyond the outer diameter of the implant member. The head also has a circular recess between the pressing surface and the outer threads of the threaded element, which recess will receive an edge of the one end of the implant member when the threaded element is received in the threaded bore to prevent body tissue from growing into any slit or crevice between the implant member and the threaded element.