Abstract
This study aims to determine the normal limits of atlanto-dental interval (ADI), basion-dens interval (BDI), basion-cartilaginous dens interval (BCDI), and prevertebral soft tissue thickness (PVSTT) according to age groups for normal pediatric cases. CT images of 256 pediatric patients aged between 1 and 15years were retrospectively evaluated. ADI, BDI, BCDI and PVSTT measurements were performed. Upper normal limit (UNL) values for ADI were 2.65-4.8mm. UNL values for PVSTT were found to be 6.9mm at C1 level, 6.7mm at C2 level, 9.3mm at C3 level, 14.2mm at C4 level, 14.1mm at C5 level, 13.8mm at C6 level and 12.8mm at C7 level. The maximum value of BDI in the group with non-ossified os terminale was 12mm, and in the group with ossified os terminale it was 10mm. The UNL of BCDI determined for females was 5.1mm, while the UNL for males was 5.6mm. We propose the obtained values as the UNL values for ADI, BDI, BCDI and PVSTT on CT images in the pediatric population from 1 to 15years.
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