| Accuracy of mesiodistal root angulation projected by cone-beam computed tomographic panoramic-like images. | |
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MedLine Citation:
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PMID: 20381767 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: In this study, we tested the accuracy of the cone-beam computed tomography panoramic (pan)-like image in the projection of mesiodistal tooth angulations. METHODS: A plastic typodont with 28 teeth in ideal occlusion was fixed in position in a dry human skull for imaging with a NewTom 3G volume scanner (AFP Imaging, Elmsford, NY). Gold standard angular measurements of each tooth were calculated by using a coordinate measuring machine (CMM) (Faro International, Lake Mary, Fla) and compared with the corresponding measurement derived from each CBCT pan-like image. Imaging processing was accomplished with the proprietary software. RESULTS: Statistically significant differences between the CMM and CBCT pan-like image mesiodistal angular projections were found for 16 of the 28 teeth, although only the mean difference and confidence intervals of teeth 22, 12, and 33 (FDI numbering system) were above at the applied tolerance limit of +/-2.5 degrees (3.675 degrees with 95% confidence interval of [3.330 degrees, 4.020 degrees], 2.006 degrees [1.339 degrees, 2.672 degrees] and 2.179 degrees [1.800 degrees, 2.557 degrees], respectively). The maxillary roots with the exception of teeth 16 and 26 were projected with greater distal angulations. The mandibular roots with the exception of teeth 44, 47, and 36 were projected with greater mesial angulations than the CMM gold standard measurement. CONCLUSIONS: Compared with previous studies on the accuracy of conventional pan radiographs, the mesiodistal angular projection of teeth on the CBCT pan-like image is closer to the true mesiodistal angulation. If the practitioner is well acquainted with how the information from the CBCT is processed to create the pan-like image, it can be a useful tool for evaluating mesiodistal root angulations. |
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Authors:
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Dana Van Elslande; Giseon Heo; Carlos Flores-Mir; Jason Carey; Paul W Major |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics Volume: 137 ISSN: 1097-6752 ISO Abbreviation: Am J Orthod Dentofacial Orthop Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-04-12 Completed Date: 2010-05-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8610224 Medline TA: Am J Orthod Dentofacial Orthop Country: United States |
Other Details:
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Languages: eng Pagination: S94-9 Citation Subset: D; IM |
Copyright Information:
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Copyright 2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Department of Dentistry, University of Alberta, Edmonton, Alberta, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cadaver Cone-Beam Computed Tomography* / methods Dental Models Humans Radiography, Panoramic* / methods Reference Standards Sample Size Software Tomography Scanners, X-Ray Computed Tooth Root / anatomy & histology*, radiography* |
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