The correlation between increased lower facial height and increased frequency of clinical posterior crossbites
Date
2013
DOI
Authors
Li, Yang
Version
OA Version
Citation
Abstract
Objective: Posterior crossbite is one of the most common malocclusions present in the deciduous and mixed dentition. Its presence may negatively influence masticatory performance, affect growth of maxilla and mandible, and even lead to remodeling of the temporomandibular joint. Our aim was to explore whether posterior lingual crossbite is associated with increased lower facial height, using cone-beam computerized tomography (CBCT) imaging.
Methods: The initial records of orthodontic patients were obtained retrospectively from private orthodontic practices. We identified 51 study subjects with clinical posterior crossbite and matched them by age and sex to an equal number of control subjects without posterior crossbite or any evidence of skeletal maxillary constriction. Lateral cephalograms were constructed from CBCT scans and traced using imaging software (Dolphin Imaging Premium Version 11.5.04.36). The null hypothesis was tested using Student's t-test.
Results: The crossbite group was found to have statistically significant increases in Frankfort mandibular plane angle, palatal plane to mandibular plane angle, palatal plane to occlusal plane angle, occlusal plane to mandibular plane angle, Y-axis, gonial angle, lower face height, anterior facial height and decreases in the mandibular arc, and posterior facial height. Furthermore, there was a decrease in posterior face height to anterior face height ratio and upper to lower face height ratio in the crossbite group. There was no statistically significant difference in the Frankfort horizontal to occlusal plane angle, Frankfort horizontal to palatal plane angle, ramus height, posterior dental height of maxilla and mandible, and anterior dental height of maxilla and mandible between the two groups.
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Thesis (MSD) --Boston University, Henry M. Goldman School of Dental Medicine, 2013 (Department of Orthodontics).
Includes bibliographic references: leaves 35-41.
Thesis (MSD) --Boston University, Henry M. Goldman School of Dental Medicine, 2013 (Department of Orthodontics).
Includes bibliographic references: leaves 35-41.
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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.