TY - JOUR
T1 - Accuracy of alveolar bone measurements from cone beam computed tomography acquired using varying settings
AU - Cook, V. C.
AU - Timock, A. M.
AU - Crowe, J. J.
AU - Wang, M.
AU - Covell, D. A.
N1 - Publisher Copyright:
© 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Objectives: To investigate the accuracy and reliability of cone beam computed tomography (CBCT) measurements of buccal alveolar bone height (BBH) and thickness (BBT) using custom acquisition settings. Settings and Sample Population: School of Dentistry, Oregon Health & Science University. Twelve embalmed cadavers. Materials and Methods: Cadaver heads were imaged by CBCT (i-CAT® 17-19, Imaging Sciences International, Hatfield, PA) using a 'long scan' (LS) setting with 619 projection images, 360° revolution, 26.9 s duration, and 0.2 mm voxel size, and using a 'short scan' (SS) setting with 169 projection images, 180° rotation, 4.8 s duration, and 0.3 mm voxel size. BBH and BBT were measured with 65 teeth, indirectly from CBCT images and directly through dissection. Comparisons were assessed using paired t-tests (p ≤ 0.05). Level of agreement was assessed by concordance correlation coefficients, Pearson's correlation coefficients, and Bland-Altman plots. Results: Mean differences in measurements compared to direct measurements were as follows, LS 0.17 ± 0.12 (BBH) and 0.10 ± 0.07 mm (BBT), and SS 0.41 ± 0.32 (BBH) and 0.12 ± 0.11 mm (BBT). No statistical differences were found with any of BBH or BBT measurements. Correlation coefficients and Bland-Altman plots showed agreement was high between direct and indirect measurement methods, although agreement was stronger for measurements of BBH than BBT. Conclusions: Compared to the LS, the similarity in results with the reduced scan times and hence reduced effective radiation dose, favors use of shorter scans, unless other purposes for higher resolution imaging can be defined.
AB - Objectives: To investigate the accuracy and reliability of cone beam computed tomography (CBCT) measurements of buccal alveolar bone height (BBH) and thickness (BBT) using custom acquisition settings. Settings and Sample Population: School of Dentistry, Oregon Health & Science University. Twelve embalmed cadavers. Materials and Methods: Cadaver heads were imaged by CBCT (i-CAT® 17-19, Imaging Sciences International, Hatfield, PA) using a 'long scan' (LS) setting with 619 projection images, 360° revolution, 26.9 s duration, and 0.2 mm voxel size, and using a 'short scan' (SS) setting with 169 projection images, 180° rotation, 4.8 s duration, and 0.3 mm voxel size. BBH and BBT were measured with 65 teeth, indirectly from CBCT images and directly through dissection. Comparisons were assessed using paired t-tests (p ≤ 0.05). Level of agreement was assessed by concordance correlation coefficients, Pearson's correlation coefficients, and Bland-Altman plots. Results: Mean differences in measurements compared to direct measurements were as follows, LS 0.17 ± 0.12 (BBH) and 0.10 ± 0.07 mm (BBT), and SS 0.41 ± 0.32 (BBH) and 0.12 ± 0.11 mm (BBT). No statistical differences were found with any of BBH or BBT measurements. Correlation coefficients and Bland-Altman plots showed agreement was high between direct and indirect measurement methods, although agreement was stronger for measurements of BBH than BBT. Conclusions: Compared to the LS, the similarity in results with the reduced scan times and hence reduced effective radiation dose, favors use of shorter scans, unless other purposes for higher resolution imaging can be defined.
KW - Alveolar bone height
KW - Cone beam computed tomography
KW - Orthodontics
KW - Reliability of results
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U2 - 10.1111/ocr.12072
DO - 10.1111/ocr.12072
M3 - Article
C2 - 25865541
AN - SCOPUS:84926455513
SN - 1601-6335
VL - 18
SP - 127
EP - 136
JO - Orthodontics and Craniofacial Research
JF - Orthodontics and Craniofacial Research
IS - S1
ER -