US Patent 7022141 Alignment device for modular implants and method

An instrument (200) for at least one of replicating and measuring the angular orientation of a first component (54) of a prosthesis (51) to a second component (52) of the prosthesis (51) for use in joint arthroplasty. The instrument (200) includes a first member (202) for cooperation with the first component (54), a second member (210) for cooperation with the second component (52), and a feature (220). The feature (220) cooperates with the first member (202) and the second member (210) for at least one of replicating and measuring the relative angular orientation of the first component (54) with respect to the second component (52).