Volume 7 Issue 4 (July-August), 2021

Original Articles

Analysis of canine retraction with active tie back and power chain- An in vivo study
Dr. Vidyut Prince, Dr. Subhi Aliya, Dr. Shubhangi Goyal, Dr. Mitrasen Raj, Dr. Devang B. Pandya, Dr. P. Bravin Paul

Background: Orthodontic tooth movement is greatly influenced by the characteristics of the applied force, like its magnitude, direction, movement to force ratio and the physiologic health of the periodontal tissue of individual patient. The present study was conducted to compare canine retraction with active tieback and power chain. Materials & Methods: 32 patients aged 16 to 24 years of both genders requiring orthodontic treatment were treated with fixed orthodontic therapy using MBT prescription of 0.022 slot (A.O). Canine retraction was started with power chain on one side (Group I) and active tieback (Group II) on contralateral side using four micro-implants in the maxilla. Canine retraction was compared in both groups. Results: Out of 32 patients, males were 10 and females were 22. The mean canine retraction at 1 month in group I was 0.38 mm and in group II was 0.28 mm, at 2 months was 0.46 mm in group I and 0.39 mm in group II, at 3 months was 0.45 mm in group I and 0.41 mm in group II and at 4 months was 0.44 mm in group I and 0.40 mm in group II. The difference was significant (P< 0.05). Conclusion: Power chain exhibited faster rate of canine retraction as compared to active tie back. Key words: Active tie back, Orthodontic, Power chain

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