Fig 3.

Arthroscopic view from the AL portal in a right shoulder in the beach chair position. The glenoid drill guide is introduced through the P portal until to engage the anterior edge of the glenoid with the hook (A). The arm of the glenoid drill guide should be parallel and flush to the glenoid surface. The guide is secured posteriorly with two bullets introduced percutaneously. Two 2.8-mm sleeved drills are introduced through each bullet and advanced under power until they exit from the anterior aspect of the glenoid (arrows) (B). Each bullet is removed and the guide is removed afterwards, keeping the drill sleeves in place (C). (AL, anterolateral; HH, humeral head; G, glenoid; SSC, subscapularis.)