Comparison of Corticotomy and Micro-Osteoperforation During Canine Retraction

"MOPs were performed with a stainless-steel manual drill tip that had 1.6mm diameter with an adjustable depth set to 5mm (Excellerator® RT; Propel Orthodontics, Milpitas, CA).~Six perforations were made along 2 parallel vertical lines (each line with 3 holes spaced \~2mm apart) distal to the canine and perpendicular to the buccal cortical bone.~The mini-screws were placed. A NiTi closed-coil spring was placed and secured with a 0.014SS ligature wire at the canine and mini-screw. A Dontrix gauge was used to measure the force (150g)"

"A full-thickness labial mucoperiosteal flap was reflected. Two vertical corticotomies (1 mesial and 1 distal to the canine) were performed. The cortical bone was cut 2 to 3 mm below the alveolar crest towards the apex, until bone marrow was exposed.~Cortical-cancellous bone grafts (0.5cc; PuraGraft, Kingwood, TX) were placed at the corticotomy sites.~The mini-screws were placed. A nickel-titanium (NiTi) closed-coil spring was placed and secured with a 0.014SS ligature wire at the canine and mini-screw. A Dontrix gauge (Orthopli Corp., Philadelphia, PA) was used to measure the force (150g)"