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

Renkema, Anne Marie ; Fudalej, Piotr S. ; Renkema, Alianne ; Bronkhorst, Ewald ; Katsaros, Christos

In: European Journal of Orthodontics, 2013, vol. 35, no. 2, p. 249-255

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    Titre
    • Gingival recessions and the change of inclination of mandibular incisors during orthodontic treatment
    Auteur
    • Renkema, Anne Marie. Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, The Netherlands
    • Fudalej, Piotr S.. Department of Orthodontics, Palacky University, Olomouc, Czech Republic
    • Renkema, Alianne. Department of Orthodontics, University Medical Centre Groningen, University of Groningen
    • Bronkhorst, Ewald. Department of Community and Restorative Dentistry, Radboud University Nijmegen Medical Centre, The Netherlands and
    • Katsaros, Christos. Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • European Journal of Orthodontics, 2013, vol. 35, no. 2, p. 249-255. Oxford University Press
    Autre version électronique
    Classification
    • Santé
    Identifiant OAI-PMH
    • oai:doc.rero.ch:298641
    Summary
    SUMMARY A recent systematic review demonstrated that, overall, orthodontic treatment might result in a small worsening of periodontal status. The aim of this retrospective study was to test the hypothesis that a change of mandibular incisor inclination promotes development of labial gingival recessions. One hundred and seventy-nine subjects who met the following inclusion criteria were selected: age 11-14 years at start of orthodontic treatment (TS), bonded retainer placed immediately after treatment (T0), dental casts and lateral cephalograms available pre-treatment (TS), post-treatment (T0), 2 years post-treatment (T2), and 5 years post-treatment (T5). Depending on the change of lower incisor inclination during treatment (ΔInc_Incl), the sample was divided into three groups: Retro (N = 34; ΔInc_Incl ≤ -1 degree), Stable (N = 22; ΔInc_Incl > -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