Gingival recessions and the change of inclination of mandibular incisors during orthodontic treatment

Abstract

-1 degree and ≤1 degree), and Pro (N = 123; ΔInc-Incl > 1 degree). Clinical crown heights of mandibular incisors and the presence of gingival recessions in this region were assessed on plaster models. Fisher's exact tests, one-way analysis of variance, and regression models were used for analysis of inter-group differences.The mean increase of clinical crown heights (T0 to T5) of mandibular incisors ranged from 0.6 to 0.91 mm in the Retro, Stable, and Pro groups, respectively; the difference was not significant (P = 0.534). At T5, gingival recessions were present in 8.8, 4.5, and 16.3 per cent patients from the Retro, Stable, and Pro groups, respectively. The difference was not significant (P = 0.265).The change of lower incisors inclination during treatment did not affect development of labial gingival recessions in this patient group. © 2011 The Author. Published by Oxford University Press on behalf of the European Orthodontic Society.