Abstract: An orthopaedic positioner instrument 1 for positioning an implant 10 or other surgical device which includes a proximal portion with a transverse hole 17 therein. The instrument includes a locator post 53 or 353 adapted to be received in the transverse hole 17 and a first adjustable pressure applying means adapted to selectively apply pressure against a first outer surface, such as a shoulder 13, of an implant 10 to firmly hold the implant or other device 10 onto instrument 1. The instrument 1 may further include a second adjustable pressure applying means adapted to selectively apply pressure against a second surface of the device, such as the medial side 16 of implant 10.

Abstract: The acetabular cup positioner of this invention provides for a sighting guide which is removable connected to the shaft of the cup positioner by a tapered locking configuration. The taper lock provides for a secure connection of the sighting guide to the shaft of the cup positioner which enhances the accuracy of the device. The taper lock provides such a strong lock that in order to provide for its removal, the cup positioner of the invention includes a slaphammer carrier on the shaft of the guide which may be employed by the surgeon to remove the guide from the positioner without undue effort.