In a multifragmentary fracture of the glenoid fossa, the small fragments are often too small to fix with the standard 3.5 conventional/cannulated screws. Typically, the following mini-fragment screws are then used:
Conventional 2.0 or 2.7 lag screws
Headless 2.4 screws (cannulated)
Headless screws are preferable where fixation involves putting them through capsule or labrum.
In addition, they are the smallest cannulated screw system.