The drum spring (DS) retractor: constant and continuous force for canine retraction

European Journal of Orthodontics
M Ali DarendelilerO Uner

Abstract

Although much research has been undertaken on the rate of tooth movement, with different hypotheses having been put forward, the concepts of the threshold, light, heavy and optimal forces are not still clear. It has been stressed that an ideal orthodontic spring should have the ability to release a constant force throughout the entire range of its activation, but using traditional techniques applied initial force will decrease, depending on its deactivation due to the tooth movement and the physical properties of the force delivery system. The purpose of this study was to test the clinical use of a new and original spring, the drum spring (DS) retractor (developed in 1992), which applies a constant and continuous force without the need for reactivation, and to compare the effect of a constant and continuous force versus a continuous but diminishing force produced by a traditional pull coil (PC) retractor system on the rate of upper canine retraction. The clinical sample consisted of 15 patients with upper first premolar extractions. For each patient, the upper right canine was retracted by using a DS retractor applying a constant and continuous force of 50 g; the upper left canine was fitted with a conventional PC applying an i...Continue Reading

Citations

Mar 8, 2005·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Eugene Chan, M Ali Darendeliler
Mar 8, 2005·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Pennapa SrivicharnkulM Ali Darendeliler
Feb 2, 2012·Computer Methods in Biomechanics and Biomedical Engineering·M Geiger
Jun 9, 2007·European Journal of Orthodontics·Koji NodaAyao Hirashita
Feb 6, 2013·European Journal of Orthodontics·Mona A MontasserChristoph Bourauel
Mar 7, 2014·The Angle Orthodontist·André da Costa MoniniAlexandre Protásio Vianna
Oct 1, 2013·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Guanghong HanHuan Jiang
Jul 12, 2008·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Badri ThiruvenkatachariRajasigamani Kandaswamy

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