Fig. 2From: The effect of micro-osteoperforations on the rate of maxillary incisors' retraction in orthodontic space closure: a randomized controlled clinical trialMicro-osteoperforations (MOPs). A and B Surgical guides; C and D MOPs on the buccal and palatal surfaces using a cylindrical surgical drill, to which the cursor was added to limit the depth of the perforation, 3 mm on the buccal surface (C) and 5 mm on the palatal surface (D)Back to article page