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Year : 2017  |  Volume : 7  |  Issue : 4  |  Page : 168-174

Mandibular incisor position changes do not explain increase in keratinized gingiva height after periodontally accelerated osteogenic orthodontics

1 European University College, Advanced Orthodontics Program, Dubai, United Arab Emirates
2 Former EUC Orthodontic Resident, Private Practice in Orthodontics, Dubai, United Arab Emirates
3 Department of Periodontology, Case Western Reserve University, Cleveland, OH, USA
4 Department of Orthodontics, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, USA

Correspondence Address:
Donald J Ferguson
Dubai Healthcare City, Bldg 27, Block D, Office 302, PO Box 53382, Dubai
United Arab Emirates
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/apos.apos_78_17

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Purpose: This study aimed to reexamine the relationship between mandibular incisor inclination, prominence and vertical changes in position, and keratinized gingival tissue (KT) height changes labial to the mandibular incisors after orthodontic treatment with and without augmented corticotomy (Cort). Materials and Methods: Two orthodontically treated groups of 35 individuals each, with (Cort) and without (conventional [Conv]) alveolar decortication and augmentation bone grafting (periodontally accelerated osteogenic orthodontics [PAOO]), were matched for sample size, gender, mandibular premolar extractions, pretreatment age, posttreatment observation period, and pretreatment KT height in this case–controlled retrospective study. Pre- and post-treatment lateral cephalometric radiographs were evaluated for mandibular incisor vertical, inclination, and prominence changes. Results: As reported previously (Wilcko 2015), KT height had significantly increased by 0.78 mm (P = 0.001) in the Cort group and decreased by 0.38 mm (P = 0.002) in Conv on an average of 1.5 years after completion of active orthodontic therapy. In this study, Cort mandibular incisors proclined and protruded significantly during therapy while Conv incisors did not. Changes in mandibular incisor inclination and prominence explained neither the decrease in keratinized gingiva height in Conv nor the KT height gain in Cort. Conclusions: In spite of mandibular incisor proclination and protrusion, orthodontic therapy combined with alveolar decortication and augmentation bone grafting resulted in a clinically significant increase in keratinized gingiva height 1.5 years' posttreatment.

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