Comparison between two tomographic sections in the diagnosis of external root resorption

Abstract

ObjectivesTo assess the accuracy of coronal and sagittal CT sections to detect cavities simulating root resorption.Material and Methods60 mandibular incisors were embedded in plaster bases, and cavities with 0.6, 1.2 or 1.8 mm in diameter and 0.3, 0.6 or 0.9 mm in depth (small, medium and large cavities) were drilled on the buccal surfaces with high-speed round burs with diameters of 0.6, 1.2 and 1.8 mm to simulate external inflammatory root resorption. Simulations in the cervical, middle and apical thirds of each tooth root were made randomly. The Dental Scan software was used to obtain 1-mm-thick axial images from direct scanning, which were reconstructed in the coronal and sagittal planes using 3D software (Syngo FastView). Each series was loaded into the software. Fourteen images of each tooth were reconstructed in the coronal plane and 14 in the sagittal plane. A total of 1,652 images were obtained for analysis. Series information, tooth number and the plane reconstructed were stored. The images generated were saved on a CD-ROM together with the visualization software (Syngo FastView). Images were analyzed by a previously calibrated blinded, radiologist. Cochran’s Q test was conducted separately for each region analyzed followed by pair-wise comparison by the McNemar test (p=0.05).ResultsNo statistically significant difference (p>0.05) was observed in the diagnosis of simulated resorption between the apical, middle, and coronal thirds. When the axial plane was assessed separately, diagnoses were statistically different (p<0.05) among the three root thirds. The apical third differed significantly (p<0.05) from the cervical and middle thirds. Diagnostic errors were more often observed in the apical third compared to the cervical and middle thirds. Mid-sized cavities revealed no statistically significant differences (p>0.05) between planes, irrespective of the third in which the resorptions were located.ConclusionWhen tomographic sections are requested for the diagnosis of buccal or lingual external root resorption, sagittal sections afford the best image characterization of the resorption process.

Comparison of anterior and posterior mini-implant-assisted maxillary incisor intrusion: Root resorption and treatment efficiency

“…Sagittal sections were selected over axial or coronal sections because resorptions were delineated better in sagittal slices. 13,14 The center of resistance (C R ) of the central incisor was used to determine the amount of intrusion. 15 The Cr determined on the preintrusion image was replicated onto the postintrusion image ( Figure 2).…”

The impact of different voxels and exposure parameters of CBCT for the assessment of external root resorptions: A phantom study

“…On the other hand, Kamburo glu et al (27) found that the voxel size did not affect the determination of occlusal decay. Lermen et al (28) reported that in the detection of small ERR cavities (0.3 mm depth and 0.6 mm diameter) on the apical region, the sagittal section gave more accurate results than the axial section. However, there is no study investigating the efficacy of different current and exposure times to determine the dimensions of ERRs.…”

Detection of Apical Inflammatory Root Resorption Associated with Periapical Lesion Using Different Methods

“…Based on the accuracy and diagnostic performance of CBCT to detect apical periodontitis, and root resorption associated with history of traumatic dental injury or orthodontic treatment when compared with conventional radiographs (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23), it was sought to compare the detection potential of AIRR in infected root canals and apical periodontitis using CBCT scans and SEM. The identification of AIRR developing as a consequence of apical periodontitis in periapical radiographs and microscopic analysis has shown little accuracy for the twodimensional image methods.…”

“…Contemporary imaging methods such as CBCT combined with map-reading strategy in various planes has shown high accuracy to identify apical periodontitis, resorptive lesions associated with traumatic dental injury or orthodontic treatments (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23).…”

“…The use of CBCT images to evaluate AIRR has been widely discussed, and suggested in different endodontic research areas due to its precision (18)(19)(20)(21)(22)(23)(24). However, literature is scarce in clinical studies comparing methodologies to identify RR.…”