Patent ID: 7901408

Claim:
An apparatus for retrograde access to an articular surface comprising: a locating device configured to be positioned on a portion of said articular surface; a tool support comprising a bore, wherein a longitudinal axis of said bore is coaxial with said locating device to establish a reference axis relative to said articular surface, an arm configured to be fixably coupled to said locating device and to said tool support, said arm configured to maintain a positional and angular relationship between said locating feature and said tool support; a cannulated shaft configured to move within said bore of said tool support along said reference axis when said tool support and said arm are fixably coupled; a screw configured to be secured within said tunnel; and a probe-driver comprising a shaft configured to extend through the cannulated shaft, a distal end of said probe-driver including a probe feature configured to extend through said screw and a predetermined distance beyond a top of said screw, said probe feature configured to position said screw at a predetermined depth in said bone relative to said locating device.