Extra-oral retraction mechanics: a review

Keith Godfrey

doi:10.2478/aoj-2004-0005

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Extra-oral retraction mechanics: a review

Australasian Orthodontic Journal

Volume 20 (2004): Issue 1 (May 2004)

By: Keith Godfrey

Open Access

|Dec 2023

Abstract

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.

Conclusion: Published studies lack the rigorous design necessary for unequivocal interpretation.

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