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Does the decision to extract influence the development of gingival recessions? : A retrospective long-term evaluation = Beeinflusst der Extraktionsentscheid die Entwicklung von gingivalen Rezessionen? : Eine retrospektive Langzeitbeobachtung

Villard, N.M. ; Patcas, R.

In: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie, 2015, vol. 76, no. 6, p. 476-492

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    Titre
    • Does the decision to extract influence the development of gingival recessions?
      A retrospective long-term evaluation
    Titre traduit ()
    • Beeinflusst der Extraktionsentscheid die Entwicklung von gingivalen Rezessionen?
    Auteur
    • Villard, N.M.. Department of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Plattenstr. 11, 8032, Zurich, Switzerland
    • Patcas, R.. Department of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Plattenstr. 11, 8032, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie, 2015, vol. 76, no. 6, p. 476-492. Springer Berlin Heidelberg
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:331479
    Summary
    Objectives: Mandibular anterior crowding can be treated by expanding the dental arch or by extracting teeth, usually premolars. The aim of this study was to assess long-term outcomes of extraction versus non-extraction therapies in terms of gingival recession. Methods: Fifty consecutive patients were selected, including 26non-extraction and 24extraction cases. All had been treated with fixed appliances because of well-defined comparable moderate crowding and Angle ClassI malocclusion. Patient age was documented before treatment, upon debonding, and during retention, thus, allowing the calculation of the duration of active treatment and retention. The records available for these three points in time included casts and cephalograms. The casts were used to quantify mandibular anterior crowding and the associated clinical crown lengths. Based on the cephalograms, a number of symphyseal variables were measured. Data analysis included descriptive statistics, correlation tests, and multiple regressions. Results: For accurate comparison of the extraction and non-extraction treatment groups, we required and verified that no significant intergroup differences were present with regard to initial crowding, duration of retention, and age at final record-taking. Both groups revealed increases in crown length, which fell short of statistical significance but were twice as large for canines than for incisors. The treatment decisions to extract premolars did result in significantly different topographic positions of the lower incisors, but they made no difference in the recession outcomes. None of the variables in our regression analysis was found to predict gingival recession. Conclusion: Findings of gingival recession in patients having undergone orthodontic treatment do not seem to be related to extraction/non-extraction treatment decisions.