Disclosed herein are systems and methods for identifying the proper implant for use in an arthroplasty procedure and preparing a bone surface for the placement of such implant. In one embodiment, a centering guide system includes a cannulated post and a translucent surface trial where the cannulated post includes a slit defining legs that flex to engage the post when inserted in a hole of the surface trial. The system is used to confirm a suitable implant size and place a pilot wire in preparation for implant placement. The cannulated post and the translucent surface trial provide comprehensive visibility of the glenoid surface. When inserted into the surface trial, an extension of the cannulated post beyond an articulating surface of the surface trial is minimal or nonexistent. In this way, the congruence of a reamed glenoid surface can be evaluated prior to implantation of the implant.
