Bağci Nuray, Büyüksungur Arda, Kurt Mehmet Hakan
Gazi University, Faculty of Dentistry, Department of Oral and Maxillofacial Radiology, Ankara, Turkey.
Ankara University, Faculty of Dentistry, Department of Basic Medical Sciences, Ankara, Turkey.
Braz Oral Res. 2025 Sep 8;39:e088. doi: 10.1590/1807-3107bor-2025.vol39.088. eCollection 2025.
The aim of this in-vitro study was to verify which field of view (FOV) in cone-beam computed tomography (CBCT) yields greater accuracy in the detection of internal root resorption (IRR) volume, in comparison to the gold standard of micro-computed tomography (micro-CT) and to a physical method. Twenty-five extractedsingle-rooted teeth were scanned by CBCT with two different FOV parameters (6x6-FOV and 10x10-FOV) and via micro-CT. The volume of dental hard tissue was measured on these images. A simulated IRR was produced by a demineralization protocol. After the simulated IRR, the volumes of the dental hard tissue and the simulated IRR were measured with the same scanning parameters. In addition, the volume of the simulated IRR was measured via a physical method. The simulated IRR volumes obtained by CBCT, micro-CT, and the physical method were statistically compared using one-way ANOVA. Before the simulated IRR, the mean volume of dental hard tissue obtained by 6x6-FOV, 10x10-FOV, and micro-CT were 266.64 ± 11.56, 284.78 ± 14.99, and 233.07 ± 19.91, respectively. The simulated IRR mean volumes obtained by 6x6-FOV, 10x10-FOV, micro-CT, and the physical method were 19.35 ± 5.92, 17.43 ± 5.20, 23.85 ± 6.63, and 13.51 ± 3.11, respectively. The mean volume of the simulated IRR obtained by micro-CT was similar to that of the 6x6-FOV and was significantly different from that of the 10x10-FOV and physical method. The mean volume value of simulated IRR obtained by the physical method was significantly different from those of the micro-CT and 6x6-FOV groups. In conclusion, the 6x6-FOV was better than the 10x10-FOV for the detection of IRR volume by CBCT under clinical conditions.
本体外研究的目的是，与微型计算机断层扫描（micro-CT）的金标准以及一种物理方法相比，验证锥形束计算机断层扫描（CBCT）中的哪个视野（FOV）在检测牙根内吸收（IRR）体积方面具有更高的准确性。对25颗拔除的单根牙分别采用两种不同的FOV参数（6x6-FOV和10x10-FOV）进行CBCT扫描，并通过micro-CT扫描。在这些图像上测量牙齿硬组织的体积。通过脱矿方案产生模拟IRR。模拟IRR后，使用相同的扫描参数测量牙齿硬组织和模拟IRR的体积。此外，通过物理方法测量模拟IRR的体积。使用单因素方差分析对通过CBCT、micro-CT和物理方法获得的模拟IRR体积进行统计学比较。在模拟IRR之前，通过6x6-FOV、10x10-FOV和micro-CT获得的牙齿硬组织平均体积分别为266.64±11.56、284.78±14.99和233.07±19.91。通过6x6-FOV、10x10-FOV、micro-CT和物理方法获得的模拟IRR平均体积分别为19.35±5.92、17.43±5.20、23.85±6.63和13.51±3.11。通过micro-CT获得的模拟IRR平均体积与6x6-FOV的相似，与10x10-FOV和物理方法的显著不同。通过物理方法获得的模拟IRR平均体积值与micro-CT和6x6-FOV组的显著不同。总之，在临床条件下，CBCT检测IRR体积时，6x6-FOV比10x10-FOV更好。
