Faculté de Chirurgie Dentaire de Toulouse, Département d'odontologie conservatrice endodontie, Toulouse, France.
J Endod. 2010 Jul;36(7):1187-90. doi: 10.1016/j.joen.2010.03.029. Epub 2010 May 13.
Cone beam computed tomography (CBCT) can provide dentists with high-quality 3-dimensional images of dental structures because of its high spatial resolution. The reconstructions of root canal systems given by the Kodak 9000 3D were compared with histologic sections to evaluate the reliability of the reconstructions.
Nine intact freshly extracted teeth with closed apexes were scanned by using the Kodak 9000 3D (spatial resolution 76 microm and 14 bits contrast resolution). After reconstruction of the volumes, the outline of the root canals was defined by segmentation. Histologic sections were then made of each specimen at predetermined levels. After digitization (resolution, 0.5-1 microm), 2-dimensional cone beam reconstructions were compared with the outline of the canals obtained by histologic sections by using areas and Feret's diameters. The statistical analysis was performed by using the Pearson correlation coefficient.
Strong to very strong correlation was found between the data acquired by using CBCT and histology: r (area) = 0.928; r (diameter) = 0.890.
The Kodak 9000 3D appears to be a very interesting, reliable, noninvasive measuring tool that can be used in all spatial planes.
由于具有较高的空间分辨率，锥形束 CT（CBCT）可为牙医提供高质量的牙齿结构三维图像。本文将通过与组织学切片对比，评估 Kodak 9000 3D 重建根管系统的可靠性。
对 9 颗根尖封闭的新鲜完整离体牙进行扫描，使用的仪器是 Kodak 9000 3D（空间分辨率 76 微米，14 位对比分辨率）。体积重建后，通过分割定义根管轮廓。然后在预定水平对每个标本进行组织学切片。数字化（分辨率 0.5-1 微米）后，使用二维锥形束重建与组织学切片获得的管腔轮廓进行对比，比较面积和 Feret 直径。使用 Pearson 相关系数进行统计分析。
CBCT 和组织学之间的相关性很强：r（面积）= 0.928；r（直径）= 0.890。
Kodak 9000 3D 似乎是一种非常有趣、可靠、非侵入性的测量工具，可用于所有空间平面。
