Journal of AdvancedMedical and Dental Sciences Research

Aim: to assess this external apical root resorption caused by mechanical intrusion of the maxillary incisors using intrusion arches and to compare it with the resorption caused by conventional orthodontics. Method and material: 40 patients were divided into two groups. group 1 received intrusion arches while group 2 received straight wires. The external root resorption was evaluated in both the groups before start of the treatment and 6 month after the treatment using CBCT. Results: The results showed significant difference between resorption of root prior to commencement and 6 months after treatment while using archwire whereas while using straight wire no such change was observed. It was noteworthy that no difference on comparing both the groups. Conclusion: No significant changes were seen on comparing both the groups however in orthodontic treatments, it is strongly advised to use light forces and to leave longer gaps between activations. Serial radiographs should be taken every 6–12 months may assist detect early root resorption, and if resorption is detected, a two–three month break from treatment with a passive arch wire may assist prevent further resorption.