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KMID : 1024020210510010027
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Imaging Science in Dentistry
2021 Volume.51 No. 1 p.27 ~ p.34
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Comparison of limited- and large-volume cone-beam computed tomography using a small voxel size for detecting isthmuses in mandibular molars
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de Souza Tolentino Elen
Amoroso-Silva Pablo Andres
Alcalde Murilo Priori
Yamashita Fernanda Chiguti
Iwaki Lilian Cristina Vessoni
Rubira-Bullen Izabel Regina Fischer
Duarte Marco Antonio Hungaro
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Abstract
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Purpose: This study was performed to compare the ability of limited- and large-volume cone-beam computed tomography (CBCT) to display isthmuses in the apical root canals of mandibular molars.
Materials and Methods: Forty human mandibular first molars with isthmuses in the apical 3 mm of mesial roots were scanned by micro-computed tomography (micro-CT), and their thickness, area, and length were recorded. The samples were examined using 2 CBCT systems, using the smallest voxels and field of view available for each device. The Mann-Whitney, Friedman, and Dunn multiple comparison tests were performed (α=0.05).
Results: The 3D Accuitomo 170 and i-Cat devices detected 77.5% and 75.0% of isthmuses, respectively (P>0.05). For length measurements, there were significant differences between micro-CT and both 3D Accuitomo 170 and i-Cat (P<0.05).
Conclusion: Both CBCT systems performed similarly and did not detect isthmuses in the apical third in some cases. CBCT still does not equal the performance of micro-CT in isthmus detection, but it is nonetheless a valuable tool in endodontic practice.
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KEYWORD
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Cone-Beam Computed Tomography, Endodontics, Molar, X-Ray Microtomography
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