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Indian Journal of Mednodent and Allied Sciences
Year : 2014, Volume : 2, Issue : 1
First page : ( 57) Last page : ( 63)
Print ISSN : 2347-6192. Online ISSN : 2347-6206.
Article DOI : 10.5958/j.2347-6206.2.1.011

‘Loops in Orthodontics’—A Review

Chakravarthy CH Nareen1,*, Kumar Perumalla Kiran2

1Reader, A J Institute of Dental Sciences, Mangalore, Karnataka

2Reader Mamata College of Dental Sciences, Khammam, Andhra Pradesh

*Corresponding Author Email: enareench@yahoo.com

Online published on 15 May, 2014.


Extraction space closure is an integral part of orthodontic treatment which demands a thorough understanding of the biomechanics. In the pre-adjusted edgewise technique, retraction is achieved either with friction (sliding) or frictionless mechanics. In the former, the wire and position of the bracket are important factors in tooth movement but the simplicity of friction mechanics is offset by the binding between bracket and archwire. This slows tooth movement, compromises the delivery of desired force levels, causes anchor loss and may be associated with undesirable side effect such as uncontrolled tipping and deep bite. A review of frictionless mechanics in general and most commonly used loops in retraction has been highlighted in this article.



Space closure, Friction, Frictionless mechanics, Bracket and archwire.


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