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Year : 2015  |  Volume : 3  |  Issue : 2  |  Page : 129-133

Comparison of rate of retraction and anchorage loss using nickel titanium closed coil springs and elastomeric chain during the en-masse retraction: A clinical study

Department of Orthodontics, CSMSS Dental College and Hospital, Aurangabad, Maharashtra, India

Correspondence Address:
Charushila Vinay Chaudhari
Department of Orthodontics, CSMSS Dental College and Hospital, Aurangabad, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2321-3825.150582

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Introduction: The aim of this study was to compare the clinical effectiveness of nickel titanium (NiTi) closed coil spring and elastomeric chain on rate of space closure in terms of anterior retraction and anchor loss. Materials and Methods: A total of 40 patients with first premolar extraction were randomly divided into two groups for space closure. Group 1 consisted of 20 patients in whom space closure was done with NiTi closed coil springs whereas in group 2 consisted of 20 patients with elastomeric chain. The amount of anterior retraction, anchor loss and rate of space closure was measured before start of retraction and at end of 4 months clinically and radiographically. Results: The observations obtained in the study were subjected to statistical analysis, so as to get their interpretation. All qualitative variables were compared using Fisher exact test. All quantitative variables were described using mean ± standard deviation and compared using unpaired t-test. P < 0.05 was considered as significant. The unpaired t-test, when applied, revealed there was a faster rate of space closure by NiTi closed coil springs when compared with elastomeric chain. Furthermore, anchor loss was more with NiTi springs as compared with elastomeric chain. Conclusion: The results of this study demonstrated faster space closure (with anterior retraction) along with significant anchorage loss was achieved by using NiTi closed coil springs when compared to the elastomeric chain.

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