Influence of basis images and skull position on evaluation of cortical bone thickness in cone beam computed tomography.

Autor: Nascimento MDCC; Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil. Electronic address: Monikellyccn@gmail.com., Boscolo SMA; Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil., Haiter-Neto F; Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil., Santos ECD; Pontifical Catholic University of Paraná, Curitiba - Paraná, Brazil., Lambrichts I; Biomedical Research Institute, Laboratory of Morphology, Hasselt, Belgium., Pauwels R; OMFS IMPATH research group, Department of Imaging & Pathology, University Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand., Jacobs R; OMFS IMPATH research group, Department of Imaging & Pathology, University Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden.
Jazyk: angličtina
Zdroj: Oral surgery, oral medicine, oral pathology and oral radiology [Oral Surg Oral Med Oral Pathol Oral Radiol] 2017 Jun; Vol. 123 (6), pp. 707-713. Date of Electronic Publication: 2017 Feb 14.
DOI: 10.1016/j.oooo.2017.01.015
Abstrakt: Objectives: The aim of this study was to assess the influence of the number of basis images and the orientation of the skull on the evaluation of cortical alveolar bone in cone beam computed tomography (CBCT).
Study Design: Eleven skulls with a total of 59 anterior teeth were selected. CBCT images were acquired by using 4 protocols, by varying the rotation of the tube-detector arm and the orientation of the skull (protocol 1: 360°/0°; protocol 2: 180°/0°; protocol 3: 180°/90°; protocol 4: 180°/180°). Observers evaluated cortical bone as absent, thin, or thick. Direct observation of the skulls was used as the gold standard. Intra- and interobserver agreement, as well as agreement of scoring between the 3 bone thickness classifications, were calculated by using the κ statistic. The Wilcoxon signed-rank test was used to compare the 4 protocols.
Results: For lingual cortical bone, protocol 1 showed no statistical difference from the gold standard. Higher reliability was found in protocol 3 for absent (κ = 0.80) and thin (κ = 0.47) cortices, whereas for thick cortical bone, protocol 2 was more consistent (κ = 0.60). In buccal cortical bone, protocol 1 obtained the highest agreement for absent cortices (κ = 0.61), whereas protocol 4 was better for thin cortical plates (κ = 0.38) and protocol 2 for thick cortical plates (κ = 0.40).
Conclusions: No consistent effect of the number of basis images or head orientation for visual detection of alveolar bone was detected, except for lingual cortical bone, for which full rotation scanning showed improved visualization.
(Copyright © 2017 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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