Patent ID: 7763080

Claim:
An implant system for fixation to a bone, the implant system comprising: an implant component for fixation to the bone; a first position reference member sized and shaped to be capable of being implanted proximate to the implant component; a second position reference member sized and shaped to be capable of being implanted proximate to the first position reference member; wherein the first position reference member and the second position reference member have longitudinal axes and are sized and shaped to be capable of relative movement; wherein both the first position reference member and second position reference member include indicia and wherein the indicia and reference members are sized and shaped so that the first position reference member and second position reference member can be implanted in the bone with the indicia of the position reference members adjacent to each other; wherein the first position reference member, second position reference member and indicia are sized, shaped and made of a material such that post-operative changes in the relative positions of the first position reference member and second position reference member can be determined by radiography or fluoroscopy; wherein the indicia of one of the position reference members comprises a longitudinal main scale and the indicia of the other of the position reference members comprises a longitudinal vernier scale.