 The primary researcher explained the nature of the study to the patients and their parents and their consent was taken. The final sample of 28 patients fulfilling the criteria were randomly divided in two groups: Group 1 PowerScope group and Group 2 Forsus group All subjects in both the treatment groups were treated with MBT 0.022- inch slot preadjusted edgewise appliance Ortho Organizers, San Marcos, Calif. Both arches were levelled and aligned upto 0.019 ×0.025 stainless steel wires and then the fixed functional appliance as per the group mentioned in the patients envelop was installed. 