Comparative Evaluation of External Apical Root Resorption Postretraction and Space Closure with 022 & 018 Self‑Ligating Brackets

Abstract

Comparision of external apical root resorption (EARR) from pretraction to postretraction and space closure with sliding mechanics, a retrospective clinical study comparing 0.022 and 0.018 self ligating MBT bracket systems .28 patients separated in 2 groups of 14 patients. Group I: Self ligating (0.022” slot), Group II : Self ligating (0.018”slot). Computed tomographic records were collected at two intervals of time.T1: Preretraction & T2 : Postretraction and space closure. The preretraction and post space closure computed tomography scans were evaluated for the assessment of external apical root resorption. For the intergroup mean of sample values among 2 distinct groups, independent t test was used to analyse the data using Statistical software software 19.0 Version.
There's no statistical substantial variation among 2 groups over T1 - T2 in terms of EARR in either of arches. Maxillary lateral incisors revealed greatest level of root resorption in both groups, with maxillary teeth showing greater apical root resorption than mandibular teeth.
No statistical substantial variance into EARR among 022 & 018 self ligating MBT bracket systems was found from preretraction to postretraction and space closure.