Evaluation of rate of tooth movement during en-masse distalisation of mandibular teeth with and without Piezocision for correction of Angle’s Class III Malocclusion - A Randomized Clinical trial.

This is a randomised controlled trial evaluating the efficiency of piezocision on the rate of tooth movement during enmasse distalisation of mandible during class III correction. 2 groups of patients will be included in the study (experimental and control group). Prior to retraction pre op CBCT will be taken for both the groups. Patients in the experimental group will undergo piezocision corticotomy. Vertical interproximal incisions of 10mm length will be made 4mm below the interdental papilla on the buccal aspect of mandible, mesial to first molars, mesial and distal to canines bilaterally post which Piezocision knife will be used for alveolar decortication to a length of 5 to 8mm and depth of about 3mm. Anchorage will be obtained from stainless steel orthodontic mini-implants  of 2mm diameter and 8mm or 10 mm length placed in buccal shelf of the mandible on right and left side using NiTi closed coil springs in both the groups.  Post op CBCT will be taken for both the groups post class 1 molar achievement. Primary outcome will be to analyse the rate of tooth movement during enmasse distalisation in correction of class III Malocclusion.  Secondary outcomes include, Axial inclination of mandibular central incisors, Root resorption of mandibular teeth, Pain perception, Gingival status, soft tissue healing and, Pulp vitality.