Articular surface failure in hybrid anatomic glenoid components: a unique failure mechanism.

Failure between the glenoid articular face and the central ingrowth cage is a unique failure mechanism to modular hybrid ingrowth glenoids. We hypothesize that this is predisposed by off-axis drilling leading to pre-stressing of the material interface. Surgeons should be aware of the existence of this failure mechanism, particularly when seeing patients with acute pain after an otherwise unproblematic TSA.