Abstract
Introduction
The purpose of this study was to evaluate the accuracy of low-dose multidetector computed
tomographic (LD-MDCT) imaging for the volumetric measurement of simulated periapical
lesions.
Methods
Eighteen monoradicular teeth were introduced in bone blocks, and periapical lesions
were simulated at the periapical region of each tooth. All teeth were imaged using
4 acquisition protocols: large (dentoalveolar) field of view (FOV) cone-beam computed
tomographic (CBCT) imaging (120 kV, 5 mA, and 0.2-mm voxel), small (dental) FOV CBCT
imaging (90 kV, 10 mA, and 0.2-mm voxel), standard multidetector computed tomographic
imaging (120 kV, 50 mA, and 0.62-mm voxel), and LD-MDCT imaging (120 kV, 10 mA, and
0.62-mm voxel). Tomographic images were evaluated by a single trained and calibrated
examiner (intraclass correlation coefficient = 0.991) using ITK-SNAP segmentation
software (University of Pennsylvania, Philadelphia, PA). The gold standard was obtained
by the impressions of the lesions with regular fluid addition silicone and individual
weighing using a precision analytical scale. Data were evaluated by the repeated measures
analysis of variance test; the significance level was defined as P < .05.
Results
No statistical differences (P > .05) were found among the groups regardless of the device, milliamperage, FOV,
or voxel size.
Conclusions
LD-MDCT shows performance comparable with other standard reference methods for measuring
the volume of periapical lesions and can be a useful and safe protocol in clinical
situations in which CBCT imaging is not available, such as in cases of patients admitted
to hospitals.
Key Words
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Article info
Publication history
Published online: April 22, 2021
Identification
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© 2021 American Association of Endodontists.
