1. A method of manufacturing an arthroplasty jig, the method comprising utilizing a computer processing device to perform the operations of: a.) generate a bone model, wherein the bone model includes a three dimensional computer model of at least a portion of a joint surface of a bone of a patient joint to undergo an arthroplasty procedure; b.) generate an implant model, wherein the implant model includes a three dimensional computer model of at least a portion of a joint surface of an arthroplasty implant to be used in the arthroplasty procedure; c.) assess a characteristic associated with the patient joint, the characteristic being at least one of a shape of a condyle surface of the patient joint or a joint gap spacing of the patient joint; d.) generate a modified joint surface of the implant model by modifying at least a portion of a joint surface of the implant model according to the characteristic; e.) shape match the modified joint surface of the implant model and a corresponding joint surface of the bone model; and f.) employ data obtained from operation e.) in the manufacture the arthroplasty jig.