Patent ID: 7510558

Claim:
A guide device for locating a working axis, said device comprising: a first element comprising a first cannulated shaft having a longitudinal axis, said first element further comprising a first contact portion having a first and a second contact surface spaced radially outwardly from said first cannulated shaft; and a second element comprising a second cannulated shaft moveably disposed along said first longitudinal axis in said cannula of said first cannulated shaft, said second element further comprising a second contact portion having a third and a fourth contact surface spaced radially outwardly from said second cannulated shaft, wherein said first and said second contact surfaces of said first contact portion are configured to contact with an articular surface about a first and a second opposite side of a defect site on an articular surface generally only along either one of the AP or ML curves of said articular surface, and wherein said third and said fourth contact surfaces of said second contract portion are configured to contact with said articular surface about a third and a fourth opposite side of said defect site generally only along the other of the AP or ML curves of said articular surface, wherein the longitudinal axis is configured to be oriented substantially normal to said articular surface when said contact surfaces of said first and said second contact portions contact said articular surface, and wherein said cannula of said second cannulated shaft is configured to receive a tool along said longitudinal axis of first element to be driven substantially normal into an articular surface of bone.