Journal of Shandong University (Health Sciences) ›› 2018, Vol. 56 ›› Issue (2): 56-61.doi: 10.6040/j.issn.1671-7554.0.2017.826

Previous Articles    

C-shaped root canal in mandibular posterior teeth evaluated by cone-beam computed tomography

ZHANG Jing1, YANG Xinghua2, LI Jianhua1, GE Tangna3, ZHANG Shucun4, XIONG Shijiang1   

  1. 1. VIP Department, Hospital of Stomatology, Shandong University, Jinan 250012, Shandong, China;
    2. Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan 250012, Shandong, China;
    3. Department of Endodontics, Hospital of Stomatology, Shandong University, Jinan 250012, Shandong, China;
    4. Department of Endodontics, Chengxi Branch of Hospital of Stomatology, Shandong University, Jinan 250000, Shandong, China
  • Published:2022-09-28

PDF (PC)

28

Abstract: Objective To evaluate the anatomical features of C-shaped canal system in mandibular posterior teeth using cone-beam computed tomography(CBCT)in order to provide imaging information for root canal therapy. Methods A total of 2 603 mandibular posterior teeth in 350 people were observed with CBCT. The incidence of C-shaped root canal was calculated, which was then checked with Fisher exact probability test in different age groups, and with Chi-square test in different gender and tooth position groups. Results (1) The incidence of C-shaped root canal was 2.60%, 0.00%, 0.16% and 31.65% among mandibular first premolars, second premolars, first molars and second molars. (2) In mandibular first premolar, the most common type of canal configuration was C4 in the coronal, followed by C3a in the middle and C4 in the apical. In mandibular second molar, the most common type was C1 in the coronal, followed by C2 in the middle and C3 in the apical. The deep longitudinal ditch of root surface appeared in the mesiolingual side(55.56%)of mandibular premolars and in the lingual side(97.00%)of second molars. (3) There were no significant difference in mandibular first premolars and second molars among different groups of teeth position and gender(P>0.05). Among different age groups, no significant difference was observed in mandibular first premolars(P>0.05), while in second molars, people aged 20-30 years and ≤20 years were more prone to have C-shaped root canal(P<0.001). Conclusion The C-shaped root canals in human mandibular posterior molars have various shapes, often occurring in the second molars, followed by the first premolars, and rarely occurring in the second premolars and first molars.

Key words: Mandibular posterior teeth, C-shaped root canal, Cone-beam computed tomography, Anatomic morphology, Incidence rate

CLC Number: 

  • R781
[1] 詹娴, 梁景平. 三维影像重建技术在口腔内科学的应用[J]. 牙体牙髓牙周病学杂志, 2008, 18(5): 293-296. ZHAN Xian, LIANG Jingping. The use of three-dimensional reconstruction in oral medicine[J]. China J Conserv Dent, 2008, 18(5): 293-296.
[2] Fan B. Cheung GS, Fan M, et al. C-shaped canal system in mandibular second molars: Part II-radiographic features[J]. J Endod, 2004, 30(12): 904-908.
[3] Gao Y, Fan B, Gary S, et al. C-shaped canal system in mandibular second molars part IV: 3D morphological analysis and transverse measurement[J]. J Endod, 2006, 32(11): 1062-1065.
[4] Fan B. Cheung GS, Fan M, et al. C-shaped canal system in mandibular second molars: Part I- Anatomical features[J]. J Endod, 2004, 30(12): 899-903.
[5] Melton DC, Krell KV, Fuller MW. Anatomical and histological features of C-shaped canals in mandibular second molars[J]. J Endod, 1991, 17(8): 384-388.
[6] Cotton TP, Geisler TM, Holden DT. Endodontic applications of cone-beam volumetric tomography[J]. J Endod, 2007, 33(9): 1121-1132.
[7] La SH, Jung DH, Kim EC, et al. Identification of independent middle mesial canal in mandibular first molar using cone-beam computed tomography imaging[J]. J Endod, 2010, 36(3): 542-545.
[8] Ozer SY. Detection of vertical root fractures of different thicknesses in endodontically enlarged teeth by cone-beam computed tomography versus digital radiography[J]. J Endod, 2010, 36(7): 1245-1249.
[9] Neelakantan P, Subbarao C, Ahuja R, et al. Cone-beam computed tomography study of root and canal morphology of maxillary first and second molars in an Indian population[J]. J Endod, 2010, 36(10): 1622-1627.
[10] Lee JH, Kim KD, Lee JK, et al. Mesiobuccal root canal anatomy of Korean maxillary first and second molars by cone-beam computed tomography[J]. Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2011, 111(6): 785-791.
[11] de Paula-Silva FW, Wu MK, Leonardo MR, et al. Accuracy of periapical radiography and cone-beam tomography scans in diagnosing apical periodontitis using histopathological findings as a gold standard[J]. J Endod, 2009, 35(7): 1009-1012.
[12] Pope O, Sathorn C, Parashos P. A comparative investigation of cone-beam computed tomography and periapical radiography in the diagnosis of a healthy periapex[J]. J Endod, 2014, 40(3): 360-365.
[13] Manning SA. Root canal anatomy of mandibular second molars. Part II. C-shaped canals[J]. Int Endod J, 1990, 23(1): 40-45.
[14] Martins JN, Mata A, Margues D, et al. Prevalence of C-shaped mandibular molars in the Portuguese population evaluated by cone-beam computed tomography[J]. Eur J Dent, 2016, 10(4): 529-535.
[15] Zheng Q, Zhang L, Zhou X, er al. C-shaped root canal system in mandibular second molars in a Chinese population evaluated by cone-beam computed tomography[J]. Int Endod J, 2011, 44(9): 857-862.
[16] Tian YY, Guo B, Zhang R, et al. Root and canal morphology of maxillary first premolars in a Chinese subpopulation evaluated using cone-beam computed tomography[J]. Int Endod J, 2012, 45(11): 996-1003.
[17] 廖骞, 韩俊力, 徐晓. 下颌第一前磨牙根管形态的分析[J].上海口腔医学, 2011, 20(5): 517-521. LIAO Qian, HAN Junli, XU Xiao. Analysis of canal morphology of mandibular first premolars[J]. Shanghai Journal of Stomatology, 2011, 20(5): 517-521.
[18] Fan B, Yang J, Gutmann JL, et al. Root canal systems in mandibular first premolars with C-shaped root configurations. Part I: microcomputed tomography mapping of the radicular groove and associated root canal cross-sections[J]. J Endod, 2008, 34(11): 1337-1341.
[19] 戴德华, 陈军霞, 魏薇, 等. 下颌前磨牙根管形态的锥形束CT研究[J]. 牙体牙髓牙周病学杂志, 2016, 26(5): 301-305. DAI Dehua, CHEN Junxia, WEI Wei, et al. Cone-beam computed tomography study of root canal morphology of mandibular premolars[J]. China J Conserv Dent, 2016, 26(5): 301-305.
[20] 陈柏彤, 韩建国,王鹏来, 等. 锥形束CT观察江苏地区汉族人群上颌第一前磨牙根管形态增龄性变化[J]. 牙体牙髓牙周病学杂志, 2015, 25(8): 501-504. CHEN Baitong, HAN Jianguo, WANG Penglai, et al. CBCT observation of aging changes in the root canal morphology of maxillary first permanent premolars in Han population in Jiangsu province[J]. China J Conserv Dent, 2015, 25(8): 501-504.
[1] WANG Yu, YIN Zengzheng, NIE Xiaokun, MA Zhide, XIONG Shijiang. Detection of middle mesial canal in 1,125 permanent mandibular first molars using CBCT and related factors [J]. Journal of Shandong University (Health Sciences), 2022, 60(3): 100-109.
[2] YIN Zengzheng, NIE Xiaokun, WANG Yu, MA Zhide, XIONG Shijiang. Morphological observation of the CBCT image about the furcation groove and root canal of 800 maxillary first premolars [J]. Journal of Shandong University (Health Sciences), 2021, 59(8): 74-79.
[3] NIE Xiaokun, HAO Xinyu, ZHANG Shucun, GE Tangna, XIONG Shijiang. A cone-beam computed tomographic study on the distolingual root of the permanent mandibular first molars [J]. Journal of Shandong University (Health Sciences), 2019, 57(3): 85-90.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright 2018 © Editorial office of Journal of Shandong University (Health Sciences)
Supported by Beijing Magtech Co.Ltd