Three-dimensional morphological analysis of C-shaped canals in mandibular first premolars in a Chinese population
Three-dimensional morphological analysis of C-shaped canals in mandibular first premolars in a Chinese population
复制标题
中国人群下颌第一前磨牙C形管三维形态分析
DOI：
10.1111/j.1365-2591.2012.02070.x
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发表时间：
2012-11-01
影响因子：
5
通讯作者：
Gutmann, J. L.
中科院分区：
文献类型：
--
作者：
Fan, B.;Ye, W.;Gutmann, J. L.
范B，叶伟，谢鄂，吴华，Gutmann JL.中国人下颌第一前磨牙C形根管的三维形态学分析International Endodontic Journal，similar to 45，1035-1041，2012.摘要目的探讨中国人下颌第一前磨牙C形根管的解剖学特征及定位。方法采用mu CT-50或mu CT-80对327颗离体下颌第一前磨牙进行扫描，其中146颗有根沟，181颗无根沟。重建后，根管系统进行了分类，根据修改Vertucci方法和解剖特征进行评价。资料分析采用单因素方差分析、卡方检验和Fishers精确检验（P < 0.05）。结果146颗下颌第一前磨牙中，有97颗根管呈C形，以Vb型为主（P < 0.001），其特点是冠部呈椭圆形，根沟下方呈漏斗形或连续的C形。在181颗无根沟的下颌第一前磨牙中，未观察到C形根管系统，Ia型根管系统所占比例（97.8%）显著高于其他类型根管系统（P < 0.001）。结论中国人下颌第一前磨牙根管沟C形根管系统的发生率较高，根管沿着解剖变异较大。
Fan B, Ye W, Xie E, Wu H, Gutmann JL. Three-dimensional morphological analysis of C-shaped canals in mandibular first premolars in a Chinese population. International Endodontic Journal,similar to 45, 1035-1041, 2012. Abstract Aim To investigate and compare the unique anatomical features and positioning of C-shaped canals in mandibular first premolars with and without radicular grooves in a Chinese population. Methodology A total of 327 extracted mandibular first premolars including 146 with radicular grooves and 181 without radicular grooves from a Chinese population were scanned by mu CT-50 or mu CT-80. After reconstruction, canal systems were classified according to a modified Vertucci method and the anatomical features evaluated. The data were analysed by one-way anova test, Chi-square test and Fishers exact test (P < 0.05). Results Of 146 mandibular first premolars with a radicular groove, 97 had C-shaped canals, the predominant anatomical canal type being Vb (P < 0.001), which was characterized by an oval canal in the coronal part and a semicolon or continuous C-shape beneath the groove. Of the 181 mandibular first premolars without a radicular groove, no C-shaped canal system was observed, and the percentage of Ia (97.8%) was significantly higher than those of other types (P < 0.001). Conclusion In teeth from a Chinese population, mandibular first premolars with radicular grooves had a high incidence of C-shaped canal systems with anatomical variations along the root.