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Posterior tooth size discrepancy

Published online by Cambridge University Press:  18 October 2010

Arlette Oueiss ,
Christine Marchal-Sixou ,
Ahmad Dallow ,
Pascal Baron  and
Jacques Faure
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Abstract

Despite having a correct anterior occlusal relationship between upper and lower teeth with canines in perfect Class I, some patients have imperfect posterior occlusal relationships with first molars in positions that are slightly Class II or Class III owing to an arch length discre pancy in the upper and lower buccal segments.

From this study of 62 subjects treated with full banded appliances and no bicuspid extrac tions we were able to determine the ideal relationship of the widths of the lower bicuspid and molar teeth with their upper antagonists, one that make it possible for the attainment of Class I relationships of both canines and first molars. This ideal value is 1.062.

We discuss the therapeutic implications of this finding, notably its influence on extraction decisions and propose solutions for cases of frank disharmony.

Keywords

Occlusal finishingTooth size dyscrepancy
Type
Research Article
Information
Journal of Dentofacial Anomalies and Orthodontics , Volume 11 , Issue 1: Varia , March 2008 , pp. 8 - 22
Copyright
© RODF / EDP Sciences

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