Aims & Objective: The objective of the study was to evaluate the alveolar bone morphometric changes and alveolar bone loss and rate of space closure after en masse retraction using CBCT images taken prior to and after treatment using two different methods of retraction, active tiebacks and Nickel Titanium closed coil springs as a split mouth design for the study. Materials & methods: MBT 0.022’’ slot brackets were bonded, initial leveling, aligning and en masse retraction in twenty patients is initiated. The available extraction space & CBCT images will be recorded before and after retraction. Both the clinically measured values as well as the CBCT values will be compared to conclude the result of the study. Results: The time interval taken by the NiTi group showed a substantial difference when compared to active tieback group. The NiTi group showed a reduction in the alveolar bone level on the labial side (P <0.001) and on the palatal side (P of 0.002). The active tieback group also displayed a reduction on the labial side (P < 0.001) whereas no difference was observed on the palatal alveolar bone (0.07). Conclusion: Faster space closure was observed with NiTI coil spring group than active tieback group & the alveolar bone was reduced during en masse retraction in both groups, higher being in the NiTi group. Keywords: Alveolar bone, Active tieback, En masse retraction, Niti coil spring