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Permanent link (DOI): https://doi.org/10.7939/R30D5W

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Frequency and Characteristics of Incidental Findings Using Cone-Beam Computed Tomography in an Orthodontic Population Open Access

Descriptions

Other title
Subject/Keyword
Incidental findings
CBCT
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Edwards, Ryan J
Supervisor and department
Carlos Flores-Mir (Dentistry)
Examining committee member and department
Giseon Heo (Dentistry)
Marcio Almeida (External)
Ava Chow (Chair-Dentistry)
Department
Medical Sciences-Orthodontics
Specialization

Date accepted
2014-08-26T13:26:54Z
Graduation date
2014-11
Degree
Master of Science
Degree level
Master's
Abstract
Objectives: To explore the nature and frequency of incidental findings in large field of view cone-beam computed tomography (CBCT). Additionally, to assess the agreement among orthodontic clinicians in the assessment of the impact of maxillofacial findings identified in CBCT imaging. Methods: A total of 427 consecutive CBCT radiologic reports obtained for orthodontic purposes were retrospectively reviewed. All findings were categorized into six anatomic categories for descriptive purposes. Additionally, using a sub-sample of these findings, the agreement between 3 orthodontists was assessed with respect to need for further follow-up and potential impact of the findings on orthodontic treatment. Results: A total of 842 incidental findings were reported in the 427 CBCT scans (1.97 findings/scan). The most prevalent findings were those located in the airway (42.3%), followed by the paranasal sinuses (30.9%), dentoalveolar (14.7%), TMJ (6.4%), surrounding hard/soft tissues (4.0%), and cervical vertebrae (1.3%) regions. Non-odontogenic findings represented 718 of the 842 (85.3%) findings. In terms of agreement when assessing clinical significance of the findings, subjects demonstrated “fair-to-good” inter-rater agreement regarding CBCT findings in terms of the need for further follow-up and the potential impact on future orthodontic treatment. Subjects demonstrated “excellent” intra-rater agreement in the assessment of CBCT findings regarding both need for follow-up and potential impact on future orthodontic treatment. Conclusions: This study demonstrates the high occurrence of incidental findings in large field of view CBCT scans in a sample of orthodontically referred cases. The majority are extragnathic findings, which can be normally considered outside the regions of interest of many dental clinicians, but which may still require follow-up and/or management. Specifically, incidental findings in the nasal-oral-pharyngeal and paranasal air sinuses are the most frequent. Subjects demonstrated higher levels of agreement for dentoalveolar findings compared with all other extragnathic regions when assessing clinical significance.
Language
English
DOI
doi:10.7939/R30D5W
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
Edwards R, Altalibi M, Flores-Mir C, “The frequency and nature of incidental findings in cone-beam computed tomographic scans of the head and neck region: A systematic review,” Journal of the American Dental Association. 2013; 144(2):161-170.Edwards R, Alsufyani N, Heo G, Flores-Mir C, “The frequency and nature of incidental findings in large field of view cone-beam computed tomography scans of an orthodontic sample,” Progress in Orthodontics. 2014;15:37. doi: 10.1186/s40510-014-0037-x.

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