Journal Article

Mandibular incisor extraction: indications and long-term evaluation

Jose-Antonio Canut

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 18, issue 1, pages 485-489
Published in print January 1996 | ISSN: 0141-5387
e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/18.1.485
Mandibular incisor extraction: indications and long-term evaluation

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SUMMARY

The extraction of a lower incisor constitutes a therapeutic alternative limited to certain occlusal situations, i.e. supernumerary incisors, tooth size anomalies (peg-shaped upper laterals), ectopic eruption and anterior crossbites. The effect of the extraction of a single incisor on the out of retention alignment of lower anterior teeth was studied in 26 treated cases. Initial (T1], final [T2] and 5–8 years out of retention (T3] dental casts were measured. Mean crowding at the start of treatment (T1=3.86 mm) relapsed out of retention [T3=1.49 mm), with a net mean improvement of 2.37 mm, Little's irregularity index at the start of treatment (T1=6.44) relapsed out of retention (T3=2.53), with a net mean improvement of T1−T3=3.91. Alignment stability seems to be better than that achieved in cases subjected to premolar extraction.

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Subjects: Restorative Dentistry and Orthodontics

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