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Accuracy of cone-beam computed tomography at different resolutions assessed on the bony covering of the mandibular anterior teeth

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Details

Original languageEnglish
Pages (from-to)41-50
Number of pages10
JournalAMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
Volume141
Issue number1
DOIs
Publication statusPublished - Jan 2012
Publication typeA1 Journal article-refereed

Abstract

Introduction: The aim of this study was to determine the accuracy of cone-beam computed tomography (CBCT) with different voxel resolutions. Measurements were made of the bony covering of the mandibular anterior teeth because this region is crucial in orthodontic treatment planning. Methods: CBCT data at 2 resolutions (0.125-mm and 0.4-mm voxels) were collected from 8 intact cadaver heads. The vertical position of the mucogingival junction was clinically assessed. After removal of the gingiva, vertical and horizontal bony measurements were taken, and the buccal alveolar bone margin was determined. Anatomic bony measures were compared with the CBCT measures, and the correlation of the mucogingival junction measures to the buccal alveolar bone margin measures was evaluated. Results: Bony measures obtained with CBCT were accurate and differed only slightly from the physical findings. The mean differences, ranging from -0.13 to +0.13 mm, were statistically not significant, but the limits of agreement showed discrepancies in the measurements as large as 2.10 mm, depending on measurement and resolution. Buccal alveolar bone margin measurements correlated with the mucogingival junction measurements (P

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