Plotino Gianluca, Grande Nicola M, Pecci Raffaella, Bedini Rossella, Pameijer Cornelis H, Somma Francesco
Department of Endodontics, Catholic University of the Sacred Heart, Largo Francesco Vito 1, 00168 Rome, Italy.
J Am Dent Assoc. 2006 Nov;137(11):1555-61. doi: 10.14219/jada.archive.2006.0091.
The authors conducted a study to demonstrate potential applications of microcomputed tomography (microCT) in the analysis of tooth morphology.
The authors selected for microCT analysis five maxillary first molars with a second canal in the mesiobuccal (MB) root, five mandibular first molars with a mesial root possessing a considerable curvature and five single-canal premolars with complicated apical anatomy. The hardware device used in this study was a desktop X-ray microfocus CT scanner (SkyScan 1072, SkyScan bvba, Aartselaar, Belgium).
The authors obtained a three-dimensional image from each of the 15 teeth. In three cases, the MB canals coalesced into one canal, while in the other two molars the canals were separate. Four of the five mandibular molars exhibited a single canal in the mesial root, which had a broad, flat appearance in a mesiodistal dimension. In the premolar teeth, the canals were independent; however, the apical delta and ramifications of the root canals were obvious, yet intricate.
MicroCT offers a reproducible technique for 3-D noninvasive assessment of root canal systems.
While this technique is not suitable for clinical use, it can be applied to improve preclinical training and analysis of fundamental procedures in endodontic and restorative treatment.
作者开展了一项研究，以证明微型计算机断层扫描（microCT）在牙齿形态分析中的潜在应用。
作者选择了五颗上颌第一磨牙（其近中颊根存在第二根管）、五颗下颌第一磨牙（其近中根有相当大的弯曲度）以及五颗单根管前磨牙（其根尖解剖结构复杂）进行microCT分析。本研究中使用的硬件设备是台式X射线微焦点CT扫描仪（SkyScan 1072，SkyScan bvba，比利时阿尔特塞尔）。
作者从这15颗牙齿中的每一颗都获得了三维图像。在三个病例中，近中颊根管合并为一个根管，而在另外两颗磨牙中，根管是分开的。五颗下颌磨牙中有四颗近中根显示为单根管，在近远中维度上呈宽阔、扁平的外观。在前磨牙中，根管是独立的；然而，根尖分歧和根管分支明显但复杂。
MicroCT为根管系统的三维无创评估提供了一种可重复的技术。
虽然这项技术不适合临床使用，但它可用于改进牙髓病学和修复治疗基础操作的临床前培训与分析。
