الفهرس 
IntroductionOnly 14 pages are availabe for public view
Abstract
T
he aim of this study was to compare the accuracy of tooth length measurements using EALs and CBCT scans to the actual tooth length.
A total of 68 molars were selected for the study and 178 canals were measured using EALs and CBCT scans. EALs measurements were done in in-vivo conditions then the teeth were extracted to compare the results of the EALs and the CBCT scans to the actual tooth length acting as a gold standard.
Results were subjected to statistical analysis using ANOVA test of variance. It was found that there was no statistically significant difference between the measurements obtained from both EALs and the actual tooth length. However, there is a slight advantage of the Root ZX mini over the Rootor. In addition to that, there was no statistically significant difference between the measurements obtained from the CBCT scans and the EALs.
We concluded that measurements obtained from the CBCT scans were as accurate as the measurements obtained from EALs. And the number of curvatures didn’t affect the accuracy of CBCT measurements. Thus, CBCT can reliably be used for tooth length determination. However, routine root canal treatment alone can’t be an indication for requesting a CBCT scan, but if pre-existing CBCT scans are present they can be used to determine working length of the teeth, thus decreasing the need for additional X-ray exposure.