Abstract:
Objectives: The purpose of this study was to evaluate the accuracy and reliability of cone-beam
computed tomography (CBCT) in the diagnosis of fenestrations defects with different voxel sizes.
Material and Methods: 128 Defects were created in eight dry skulls with a diameter of one,
two, three and four millimeters on the buccal aspect, respectively in each quadrant. Measurements
were obtained using a digital caliper. These were considered to be the gold standard. The skulls were
scanned by CBCT (NewTom- Giano) at two settings: (a) Voxel size 0.3 mm Standard Resolution
(SR) (b) voxel size 0.125 mm High Resolution (HR). The accuracy of the CBCT measurements was
determined by comparing the mean of all radiographic measurements, using SAS software version
9.4 for data analysis with those of direct measurements and Duncan’s Multiple Range Test.
Results: Statistical analysis for both SR and HR with the gold standard measurements for
each defect on the skulls revealed statistically significant correlation between the radiographic
measurements and real measurements (P ≤ 0.05) indicating accuracy, also no statistically significant
difference was found within the measurements accuracy of each group (P > 0.05) with the different
defects sizes. Duncan’s multiple range test revealed that the HR voxel size 0.125 mm is of slightly
higher accuracy.
Conclusion: Based on the results of the present study, CBCT (NewTom- Giano) has
demonstrated high accuracy and reliability, in measuring different fenestration sizes with different
resolution (HR 0.0125 mm and SR 0.300 mm voxels). Measurements were with same accuracy
despite the slightly higher performance of HR (0.125 mm voxel)
