Stability of mandibular anterior orthodontic alignment following piezo-facilitated orthodontic treatment and bone graft
Date
2013
DOI
Authors
Gupta, Ritu
Version
OA Version
Citation
Abstract
Objectives:
1. To evaluate the stability of orthodontic alignment in mandibular anterior teeth following piezo-facilitated treatment at least 1 year after treatment and compare it with controls treated with conventional orthodontic treatment without piezocision.
2. To determine the stability of bone graft on CBCT 1 year post treatment in cases treated with piezocision and alveolar augmentation.
Methods: Eleven patients who underwent piezo-facilitated orthodontic treatment in the Department of Orthodontics were evaluated. All had a mean of 4mm (range 3-5mm) mandibular anterior crowding and were treated nonextraction. Measurements were made on study casts from 3 different time po nts: T0 (p retreatment); T1 (post-treatment); and T2 (at least l year postĀ treatment). These included arch perimeter and depth, irregularity index, and intermolar and intercanine widths. Comparisons were made with the age and sex matched control group treated without piezocision. Bone volume measured on CBCT scans taken before the graft and one year after was compared in 5 subjects to assess stability of the graft.
Results: 2-tailed paired t-tests were used to compare the time points pairwise in both groups separately. Significant relapse was observed in all parameters from T1 to T2. There was still significant change between TO and T2 with respect to arch perimeter, intermolar width and irregularity index. In the control group a significant overall change was observed only with respect to irregularity index. The control group showed more relapse of the intercanine width and arch perimeter. A statistically significant increase in bone volume on CBCT was observed at 1 year after the bone graft in piezocision group. Anterior bone graft subjects in the piezocisionĀ facilitated group showed more stability of intercanine width as compared to no graft subjects.
Conclusion: The piezocision group showed more stability as compared to control group with respect to intercanine width and arch perimeter. However, no difference was observed with respect to irregularity index between both the groups. A follow up study with a larger sample size and longer retention period is required for more definitive results.
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Thesis/Dissertation (MSD) --Boston University, Goldman School of Dental Medicine, 2013 (Department of Orthodontics and Dentofacial Orthopedics).
Includes bibliographic references: leaves 31-34.
Thesis/Dissertation (MSD) --Boston University, Goldman School of Dental Medicine, 2013 (Department of Orthodontics and Dentofacial Orthopedics).
Includes bibliographic references: leaves 31-34.
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This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.