Patent ID: 7431736

Claim:
A prosthesis implantation method. comprising the steps of: (a) positioning a trial assembly in a resected bone, said trial assembly including a trial body portion having a trial bore defined therein, and a trial head portion having (i) a trial head member which includes a trial offset indicia, and (ii) an eccentrically located trial head stem extending from said trial head member, said trial head stem being configured to be received within said trial bore; (b) rotating said trial head portion relative to said trial body portion while said trial assembly is positioned in said resected bone so as to position said trial head portion relative to said trial body portion at an aligned orientation in which said trial head portion covers a resected surface of said resected bone; (c) removing said trial assembly from said resected bone after step (b); (d) positioning said trial assembly in a scale mechanism having a plurality of distinct values displayed thereon after step (c), said trial offset indicia of said trial head portion being aligned with one of said plurality of distinct values displayed on said scale mechanism in response to step (d); (e) securing a final head portion to a final body portion based on said one of said plurality of distinct values after step (d) so as to form a final prosthesis assembly; and (f) implanting said final prosthesis assembly in said resected bone after step (e), wherein said scale mechanism includes an indicia surface, and wherein said plurality of distinct values are displayed on said indicia surface, and wherein said scale mechanism includes a channel defined therein, and step (d) includes the step of locating said trial body portion within said channel.