Discussion
torsions, angulations, tooth
ROOT RESORPTION, ENDODONTICALLY-TREATED TEETH
According to the results obtained, endodontic treatment affects the ability to distinguish ERR. CBCT was proved to be a better and more accurate diagnostic technique than DPR for both types of measurement: estimation of tooth length and assessment of external root resorption lesions. The results showed differential detection of ERR in non-endodontic teeth when analyzed with CBCT compared to teeth with and without root canal treatment analyzed with DPR.Two main aspects, physical and optical, can affect the perception of ERR when a tooth has received root canal treatment. Among the physical factors, some authors [Among the optical factors, the quality of the radiographic image can be severely affected by dental angulations and torsions [After an in vivo study [It would have been more desirable to use upper incisor teeth in this study, but these are the ones that are most commonly damaged [The methodology used in this research was similar to one proposed by previous authors [At the same time, this research study adopted a widely-used experimental model based on root resorption produced by round burs [We speculate that these results are due to the radiopacity of endodontic teeth, which results in greater root brightness than in non-endodontic teeth. Apart from that, DPR was studied using two-dimensional images and, for all the reasons mentioned above, it is particularly difficult to detect ERR on DPR images. In all 2D image experiments, palatal resorptions were only detected on non-endodontic and endodontic teeth with the largest drill bit. Overall, detection of ERR in endodontically-treated teeth may be underdiagnosed and more careful inspection is required than when screening for ERR in vital teeth.