Chen Junhong, Li Xiangjie, Su Yang, Zhang Dan, Wen Xiujie, Nie Xin, An Jianping, Liu Luchuan, Deng Manjing
Department of Stomatology, Institute of Surgery Research, Daping Hospital, The Third Military Medical University, 10# Changjiangzhilu, Daping, Yuzhong District, Chongqing, 400042, People's Republic of China.
Clin Oral Investig. 2015 Mar;19(2):329-34. doi: 10.1007/s00784-014-1242-1. Epub 2014 Apr 16.
This study aims to explore the correlation between radicular grooves and root canal types by quantitatively detecting the radicular groove of mandibular first premolars using micro-computed tomography.
A total of 127 mandibular first premolars were scanned by micro-computed tomography, and 52 teeth with radicular grooves were identified. Details of root canal type and groove length, depth, and location were analyzed from three-dimensional images.
A total of 40.9 % (52/127) of teeth had radicular grooves. Most of the grooves (69.5 %) were located on the mesial surface of the root. The prevalence of radicular grooves in single canals (17.4 %; 15/86) was lower than that in multiple and complex canals (90.2 %; 37/41); this difference was statistically significant (P < 0.001). The mean length and depth of radicular groove in type V (7.7 ± 2.16 and 0.87 ± 0.39 mm, respectively) and other types of canals (6.91 ± 2.67 and 0.63 ± 0.27 mm, respectively) were significantly longer and deeper than type I canals (6.06 ± 2.12 and 0.43 ± 0.14 mm, respectively).
Multiple and complex canals had a higher incidence of radicular grooves and more complicated root morphology than single and simple canals. Therefore, the anatomy of radicular grooves may influence root canal morphology.
The existence of a radicular groove is closely related to root anatomy and root canal morphology. Anatomical complexity increases the difficulty of root canal treatment and periodontal therapy; therefore, the current data may provide clinicians with a more thorough understanding of the relationship between radicular grooves and root canal morphology.
本研究旨在通过显微计算机断层扫描定量检测下颌第一前磨牙的根管沟，探讨根管沟与根管类型之间的相关性。
对127颗下颌第一前磨牙进行显微计算机断层扫描，识别出52颗有根管沟的牙齿。从三维图像分析根管类型以及沟的长度、深度和位置的详细情况。
共有40.9%（52/127）的牙齿有根管沟。大多数沟（69.5%）位于牙根的近中面。单根管中根管沟的发生率（17.4%；15/86）低于多根管和复杂根管（90.2%；37/41）；差异有统计学意义（P＜0.001）。V型根管（分别为7.7±2.16和0.87±0.39mm）及其他类型根管（分别为6.91±2.67和0.63±0.27mm）中根管沟的平均长度和深度显著长于和深于I型根管（分别为6.06±2.12和0.43±0.14mm）。
多根管和复杂根管比单根管和简单根管有更高的根管沟发生率和更复杂的牙根形态。因此，根管沟的解剖结构可能影响根管形态。
根管沟的存在与牙根解剖结构和根管形态密切相关。解剖结构的复杂性增加了根管治疗和牙周治疗的难度；因此，目前的数据可为临床医生提供对根管沟与根管形态之间关系更全面的理解。
