Journal Article

A long-term evaluation of treated Class II division 2 malocclusions: a retrospective study model analysis

JA Canut and S Arias

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 21, issue 4, pages 377-386
Published in print August 1999 | ISSN: 0141-5387
Published online August 1999 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/21.4.377
A long-term evaluation of treated Class II division 2 malocclusions: a retrospective study model analysis

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Pre-treatment, end of treatment, and post-retention study models of 30 subjects with a Class II division 2 malocclusion were assessed, after a period of at least 3 years, in order to evaluate the long-term changes in occlusion, alignment, and arch dimensions.

Molar relationship correction was found to be stable after retention. There were no variables which could be used to establish a prognosis of vertical stability. Over-correction of overbite was seen to relapse. Ten per cent of the cases showed unacceptable anterior maxillary irregularities after retention. Mandibular arch width and length usually showed a decrease after retention. An increase in lower intercanine width and arch length achieved by orthodontic treatment always relapsed. This relapse was associated with post-retention mandibular irregularity and crowding. Nine cases (30 per cent) showed an unacceptable degree of mandibular irregularity after retention. Pre-treatment crowding in the mandible showed a relationship with post-retention lower irregularity and crowding. There was a correlation between the number of years which had elapsed after retention, overbite relapse and post-retention mandibular irregularity.

Journal Article.  0 words. 

Subjects: Restorative Dentistry and Orthodontics

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