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Accuracy of volumetric measurement of simulated root resorption lacunas based on cone beam computed tomography
Author(s) -
Wang Y.,
He S.,
Guo Y.,
Wang S.,
Chen S.
Publication year - 2013
Publication title -
orthodontics and craniofacial research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 55
eISSN - 1601-6343
pISSN - 1601-6335
DOI - 10.1111/ocr.12016
Subject(s) - cone beam computed tomography , resorption , root resorption , computed tomography , nuclear medicine , volume (thermodynamics) , tomography , materials science , medicine , radiology , physics , pathology , quantum mechanics
Structured Abstract Objectives To evaluate the accuracy of volumetric measurement of simulated root resorption cavities based on cone beam computed tomography ( CBCT ), in comparison with that of M icro‐computed tomography ( M icro‐ CT ) which served as the reference. Setting and Sample Population The S tate K ey L aboratory of O ral D iseases at S ichuan U niversity. Material and Methods Thirty‐two bovine teeth were included for standardized CBCT scanning and M icro‐ CT scanning before and after the simulation of different degrees of root resorption. The teeth were divided into three groups according to the depths of the root resorption cavity (group 1: 0.15, 0.2, 0.3 mm; group 2: 0.6, 1.0 mm; group 3: 1.5, 2.0, 3.0 mm). Each depth included four specimens. Differences in tooth volume before and after simulated root resorption were then calculated from CBCT and M icro‐ CT scans, respectively. The overall between‐method agreement of the measurements was evaluated using the concordance correlation coefficient ( CCC ). Results For the first group, the average volume of resorption cavity was 1.07 mm 3 , and the between‐method agreement of measurement for the volume changes was low ( CCC = 0.098). For the second and third groups, the average volumes of resorption cavities were 3.47 and 6.73 mm 3 respectively, and the between‐method agreements were good ( CCC = 0.828 and 0.895, respectively). Conclusions The accuracy of 3‐ D quantitative volumetric measurement of simulated root resorption based on CBCT was fairly good in detecting simulated resorption cavities larger than 3.47 mm 3 , while it was not sufficient for measuring resorption cavities smaller than 1.07 mm 3 . This method could be applied in future studies of root resorption although further studies are required to improve its accuracy.