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Clinical Technique
7 (
1
); 52-53
doi:
10.4103/2321-1407.199177

Modified laceback for canine retraction

Departments of Orthodontics, Chandra Dental College, Barabanki, Uttar Pradesh, India
Departments of Pedodontics, Chandra Dental College, Barabanki, Uttar Pradesh, India
Department of Orthodontics, The Oxford Dental College, Bengaluru, Karnataka, India
Department of Orthodontics, Dasmesh Institute of Research and Dental Sciences, Faridkot, Punjab, India
Address for Correspondence: Dr. Stephen Chain, Department of Orthodontics, Chandra Dental College, Barabanki, Uttar Pradesh, India. E-mail: steve911us@gmail.com
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This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
How to cite this article: Chain S, Shinghal M, Tan K, Chabbra M. Modified laceback for canine retraction. APOS Trends Orthod 2017;7:52-3.

Abstract

This is a modified lace back to distalize canine. This modification overcomes the previous problems associated with the design.

Keywords

Canine
laceback
open coil

INTRODUCTION

The use of elastic has been used aplenty in orthodontics. They are beinig used in the actice ligation, active tie back and most commonly in the closure of spaces. The use of elastomeric modules as an adjunct to the laceback has been described in Systemized Orthodontic Treatment Mechanics.[1] This is to retract the canine and make space for the blocked lateral or to upright a tipped canine. The use of elastomeric comes with its demerits such as:

  • Increased amount of force

  • Rapid force degradation

  • Appliance removal while reactivating.

To overcome these problems we have devised a technique of active lace back using an open coil spring (3 mm × 020”) with 0.009” stainless steel ligatures (3M Unitek, Monrovia, CA 91016, USA). The ligature is placed on the brackets as the laceback with the ends crossed mesial to the canine before placing the arch wire [Figure 1]. An open coil spring of 8 mm is placed in the wire and the archwire is placed in the brackets and the canine bracket is ligated with the metal ligatures [Figure 2]. Mesial to the canine the open ends of the ligatures are brought forward and the coil spring is compressed with the ligature winding it onto the wire and closing the spring [Figure 3]. When the open coil spring unwinds itself it pushes the canine distally.

Figure 1: The ligature wire is placed without the placement of the arch wire
Figure 2: The arch wire is then placed with the open coil spring and the canine bracket is ligated with metal ligatures
Figure 3: The ends of the ligatures are brought forward and tied with the compression of the open coil spring

This method is a modification to the original active laceback but with added advantages of Immediate reactivation of the laceback, Low force ratio and constant force application.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

References

  1. , , . Systemized Orthodontic Treatment Mechanics. Edinburgh: Mosby.
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