Australasian Orthodontic Journal (May 2004)

Extra-oral retraction mechanics: a review

  • Godfrey Keith

DOI
https://doi.org/10.2478/aoj-2004-0005
Journal volume & issue
Vol. 20, no. 1
pp. 31 – 40

Abstract

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Objectives: The literature relating the centres of resistance of the maxillary molars, the maxillary dental arch, and the maxilla to extra-oral retraction vectors intended for both orthodontic and orthopaedic effects, is reviewed. Conventional clinical wisdom concerning the different effects of cervical-, straight-, and high-pull vectors is questioned.