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CBCT-based assessment of root canal treatment using micro-CT reference images

锥束ct 根管 医学 穿孔 臼齿 核医学 再现性 计算机断层摄影术 计算机断层摄影 射线照相术 断层摄影术 牙科 口腔正畸科 材料科学 放射科 数学 统计 冶金 冲孔
作者
Alessando Lamira,Jardel Francisco Mazzi-Chaves,Laura Ferreira Pinheiro Nicolielo,Graziela Bianchi Leoni,Alice Corrêa Silva-Sousa,Yara Teresinha Corrêa Silva-Sousa,Ruben Pauwels,Nico Buls,Reinhilde Jacobs,Manoel Damião Sousa-Neto
出处
期刊:Imaging Science in Dentistry [Korean Academy of Oral and Maxillofacial Radiology]
卷期号:52 (3): 245-245 被引量:1
标识
DOI:10.5624/isd.20220019
摘要

This study compared the root canal anatomy between cone-beam computed tomography (CBCT) and micro-computed tomography (micro-CT) images before and after biomechanical preparation and root canal filling.Isthmus-containing mesial roots of mandibular molars (n=14) were scanned by micro-CT and 3 CBCT devices: 3D Accuitomo 170 (ACC), NewTom 5G (N5G) and NewTom VGi evo (NEVO). Two calibrated observers evaluated the images for 2-dimensional quantitative parameters, the presence of debris or root perforation, and filling quality in the root canal and isthmus. The kappa coefficient, analysis of variance, and the Tukey test were used for statistical analyses (α=5%).Substantial intra-observer agreement (κ=0.63) was found between micro-CT and ACC, N5G, and NEVO. Debris detection was difficult using ACC (42.9%), N5G (40.0%), and NEVO (40%), with no agreement between micro-CT and ACC, N5G, and NEVO (0.05<κ<0.12). After biomechanical preparation, 2.4%-4.8% of CBCT images showed root perforation that was absent on micro-CT. The 2D parameters showed satisfactory reproducibility between micro-CT and ACC, N5G, and NEVO (intraclass correlation coefficient: 0.60-0.73). Partially filled isthmuses were observed in 2.9% of the ACC images, 8.8% of the N5G and NEVO images, and 26.5% of the micro-CT images, with no agreement between micro-CT and ACC, and poor agreement between micro-CT and N5G and NEVO. Excellent agreement was found for area, perimeter, and the major and minor diameters, while the roundness measures were satisfactory.CBCT images aided in isthmus detection and classification, but did not allow their classification after biomechanical preparation and root canal filling.

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