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Kwon: Reader's Forum
Reader's Forum
The Korean Journal of Orthodontics

The Korean Journal of Orthodontics 2013; 43(2): 53.

Published online: 25 April 2013

DOI: https://doi.org/10.4041/kjod.2013.43.2.53

Reader's Forum

Soon-Yong Kwon

Private Practice, Seoul, Korea.

Department of Orthodontics, Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.

© 2013 The Korean Association of Orthodontists.

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Mo SS, Kim SH, Sung SJ, Chung KR, Chun YS, Kook YA, Nelson G
Torque control during lingual anterior retraction without posterior appliances.
- Korean J Orthod 2013;43(1):3-14
Q1. Could you explain how the C-retractor can be removed when several teeth are connected on the lingual surface?
Q2. It is a reasonable concern that transverse width problems could develop between the canines and second premolars in fist premolar extraction cases. Your comment would be appreciated.
Q3. In treatment of crowding cases, when do you begin using a conventional labial orthodontic appliance during retraction with the C-retractor?
Sung-Seo Mo

Private Practice, Seoul, Korea.

Department of Orthodontics, Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.

A1. The C-retractor can be removed by making groo ves on the resin base. In anterior deep bite cases, the lingual pads should be made small and slim in size. When the C-retractor is removed, cut ting the wire between lingual pads is followed by grinding the partial lingual pads with the high-speed dental handpiece. Next, the contact area between the pads and the teeth is reduced. After ward, the C-retractor can be removed with the lingual bracket removal plier or weingart utility plier.
A2. The C-retractor is not intended for the entire treatment period. During the second half of retrac tion, remove the wire at the canines. From this point on, the horizontal and vertical adjustment of a canine position is performed and a conventional full bonded appliance is combined for finishing.
A3. In the canine retraction model it is possible to retract the canine in mild crowding cases as long as no hard early contact is present. However, if there is moderate crowding or more, using the C-retractor may have to wait until after de-crowding with the labial or lingual brackets.
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