All the participants bonded by the care provider with 0.022 inch MBT prescription appliance (Ortho TechanologyTM,USA). Mini-implant facilitated micro-osteoperforation (MOPs) were placed in the experimental group before placing the initial leveling arch wire. MOPs were placed at three sites i.e., interproximally between mandibular canine and lateral incisor on both sides and between central incisors in the midline on labial aspect of mandible.

All the participants in this group bonded by the principal investigator with 0.022-inch slot MBT prescription appliance (Ortho TechanologyTM,USA). No micro-osteoperforation was used in this group.

Mini-implant facilitated micro-osteoperforation (MOPs) were placed in the experimental group before placing the initial leveling arch wire. MOPs were placed at three sites i.e., interproximally between mandibular canine and lateral incisor on both sides and between central incisors in the midline on labial aspect of mandible.

3D scanned study models were used to measure the amount of crowding in the mandibular anterior teeth using 3D program (DentalCad,Galway,3.0,2021). If Little's irregularity index is less than 1mm and alignment improvement not above 0.5 mm between two successive visits, then treatment is regarded as finished.

3D scanned study models were used to measure the amount of crowding in the mandibular anterior teeth using 3D program (DentalCad,Galway,3.0,2021). If Little's irregularity index is less than 1mm and alignment improvement not above 0.5 mm between two successive visits, then treatment is regarded as finished.

3D scanned study models were used to measure the amount of crowding in the mandibular anterior teeth using 3D program (DentalCad,Galway,3.0,2021). If Little's irregularity index is less than 1mm and alignment improvement not above 0.5 mm between two successive visits, then treatment is regarded as finished.

The amount of root resorption was measured at the start of treatment and after 12 weeks, the length of the root was recoded at these time intervals. Radiographic films were positioned using a customized sensor holder for the lower anterior teeth with a 7cm film-cone distance using long cone paralleling technique. The radiographs were made at 70kV and 8mA DC with an exposure of 0.25 seconds.