Evolution des dents de sagesse dans les traitements de classe II division 1 avec et sans extractions.

L' Orthodontie française
Sarah Gebeile-ChautyJean-Jacques Aknin

Abstract

Various factors participate to lower third molar eruption included premolar extractions. In Class II division 1 malocclusion, premolar extractions are sometimes decided to correct antero-posterior malocclusion. Alternative therapies without extractions exist such as DAC appliance. What is the influence on third molar eruption of extractions and non extractions in Class II division 1 malocclusion? We made a study with 60 subjects with Class II division 1 malocclusion: 30 were treated without extractions and 30 were treated with 4 extractions (included second lower premolars). We observed the evolution rate of third lower molars, the movement in the mandible and the modifications on lower arch. Extractions of second lower premolars increase the possibilities of third lower molars eruption (that increase from 10% to 50%). Like in others publications, extractions of second lower premolars, more than the first, may increase significantly the evolution rate of third molars. Nevertheless, inclusion risk is not reduced and is still important (50% in our study) with the probability that the treatment leads at the end to extractions of a quart of dental capital of the patients.

References

Apr 1, 1976·American Journal of Orthodontics·R Williams, F J Hosila
Oct 1, 1972·American Journal of Orthodontics·A Björk, V Skieller
Aug 12, 1998·European Journal of Orthodontics·D ErdemE Başpinar
Mar 14, 2000·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·B N Shearn, M G Woods
Feb 21, 2003·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Tae-Woo KimFlavia Artese

Related Concepts

Malocclusion
Mandible
Molar Tooth
Extraction
Structure of Mandibular Premolar Tooth
Structure of Mandibular Molar Tooth
Permanent Premolar Tooth
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