C-shaped canal system in mandibular second molars part IV: 3-D morphological analysis and transverse measurement
C-shaped canal system in mandibular second molars part IV: 3-D morphological analysis and transverse measurement
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下颌第二磨牙C形根管系统第四部分：3D形态分析和横向测量
DOI：
10.1016/j.joen.2006.05.014
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发表时间：
2006-11-01
影响因子：
4.2
通讯作者：
Fan, Mingwen
中科院分区：
文献类型：
--
作者：
Gao, Yuan;Fan, Bing;Fan, Mingwen
本研究的目的是利用显微计算机断层扫描（ACT）和三维重建技术研究C形根管系统的三维形态。从中国本地人群中收集了102个下颌第二磨牙，其中有融合根。CT扫描牙体，三维重建软件进行三维重建。对98颗具有C形根管系统的牙齿进行了进一步分析。将根管三维重建图像分为3类：合并型（1型）、对称型（11型）和不对称型（111型）。每个牙齿的横截面图像提交给计算机分析，并测量最小根管壁厚度。在98颗磨牙中，合并型32颗（32.65%），对称型38颗（38.78%），不对称型28颗（28.57%）。Ⅰ型的最小根管壁厚度在根尖部和中部明显大于11型和Ⅲ型（p < 0.05）。充分了解C形根管系统的形态和最小壁厚的位置，将确保更有效的根管治疗。
The purpose of this study was to investigate three-dimensional (3-D) morphology of C-shaped root canal system using micro-computed tomography (ACT) and 3-D reconstruction. There were 102 extracted mandibular second molars with fused roots collected from a native Chinese population. The teeth were scanned by ACT and reconstructed by 3-D software. The 98 teeth that possessed a C-shaped canal system were further analyzed. The 3-D reconstructed images of canals were classified into three categories: merging type (type 1), symmetrical type (type 11), and asymmetrical type (type 111). The cross-sectional images of each tooth were submitted to computer analysis, and the minimum canal wall thickness was measured. In these 98 molars, 32 (32.65%) teeth showed a merging type appearance, 38 (38.78%) a symmetrical type and 28 (28.57%) an asymmetrical type. The minimum canal wall thickness in type I was thicker than that in type 11 or type III in the apical and middle portion (p < 0.05). Being fully aware of the configuration of C-shaped root canal system and the location of minimum wall thickness will ensure more efficient root canal treatment.