Root and Canal Morphology of Primary Maxillary Second Molars Studied by CBCT

doi:10.13701/j.cnki.kqyxyj.2024.09.011

Abstract

Abstract: Objective: To analyze the root and canal morphology of primary maxillary second molars by using cone-beam computed tomography (CBCT) images. Methods: CBCT images of 144 Chinese children (aging from 4 to 8) in the Department of Stomatology, Shenzhen Children's Hospital were analyzed. The number of roots and morphology of canals were record. The data were statistically analyzed by software SPSS 26.0. Results: Ninety-eight point five percent of the teeth had three roots and one point five percent had four roots, respectively. There was no significant difference in the number of roots between genders (P=1.000) and between left and right sides (P=0.123). Of the subject enrolled, 3 canals in 3 roots were found in 62.03% and 4 canals in 3 roots in 31.95% of the molars, respectively. There was no difference in the 2 major types of root canal between genders (P=0.513) and between left and right sides (P=0.894). Conclusion: The morphology of the root canals of maxillary second primary molars is very complex. It is necessary to master the common morphological types before root canal treatment to improve the success rate of root canal treatment.

Key words: primary maxillary second molars, CBCT, root, root canal

PENG Xuezhen, KONG Jie, ZHANG Li, LIU Jie, WANG Qin. Root and Canal Morphology of Primary Maxillary Second Molars Studied by CBCT[J]. Journal of Oral Science Research, 2024, 40(9): 816-819.

References

[1] Zhang ZL, Peng YR, Zou J, et al. Space maintenance for the premature loss of the second primary molar [J]. Chin J Stomatol, 2019, 54(12):851-854.
[2] Cleghorn BM, Boorberg NB, Christie WH. Primary human teeth and their root canal systems [J]. Endod Topics, 2012, 23:6-33.
[3] Fumes AC, Sousa-Neto MD, Leoni GB, et al. Root canal morphology of primary molars: a micro-computed tomography study [J]. EurArch Paediatr Dent, 2014, 15(5): 317-326.
[4] Senan EM, Alhadainy HA, Genaid TM, et al. Root form and canal morphology of maxillary first premolars of a Yemeni population [J]. BMC oral health, 2018, 18(1): 94.
[5] 龙明生,刘彩云,杜昌连.乳牙根管系统的形态研究[J].华西口腔医学杂志,2011,29(5):517-518.
[6] Yang L, Chen X, Tian C, et al. Use of cone-beam computed tomography to evaluate root canal morphology and locate root canal orifices of maxillary second premolars in a Chinese subpopulation [J]. J Endod, 2014, 40(5):630-634.
[7] Domark JD, Hatton JF, Benison RP, et al. An ex vivo comparison of digital radiography and cone-beam and micro computed tomography in the detection of the number of canals in the mesiobuccal roots of maxillarymolars [J]. J Endod, 2013, 39(7):901-905.
[8] 邓辉.儿童口腔医学[M].北京: 北京大学医学出版社,2005.15-18.
[9] Bagherian A, Kalhori KA, Sadeghi M, et al. An in vitro study of root and canal morphology of human deciduous molars in an Iranian population [J]. J Oral Sci, 2010, 52(3):397-403.
[10] Ozcan G, Sekerci AE, Cantekin K, et al. Evaluation of root canal morphology of human primary molars by using CBCT and comprehensive review of the literature [J]. Acta Odontol Scand, 2016, 74(4): 250-258.
[11] Sarkar S, Rao AP. Number of root canals, their shape, configuration, accessory root canals in radicular pulp morphology. A preliminary study [J]. J Indian Soc Pedod Prev Dent, 2002, 20(3):93-97.
[12] Krishnamurthy NH, Jose S, Thimmegowda U, et al. Evaluation of anatomical variations in root and canal morphology of primary maxillary second molars: A cone beam computed tomography study [J]. Int J Clin Pediatr Dent, 2021, 14(5):628-632.
[13] 马向玉,张璐瑶,彭弘达,等.锥形束 CT 应用于第二乳磨牙根管形态的研究[J].临床口腔医学杂志,2020,36(9):556-559.
[14] 韦梦瑶,胡心怡,李冰,等.乳磨牙根管复杂性的CBCT研究[J].口腔医学,2021,41(4):318-322+384.
[15] 余小琼,汪诗雯,余程.锥形束CT应用于乳磨牙根管形态的研究[J].临床口腔医学杂志,2023,39(1): 23-25.
[16] Zoremchhingi, Joseph T, Varma B, et al. A study of root canal morphology of human primary molars using computerised tomography: an in vitro study [J]. J Indian Soc Pedod Prev Dent, 2005, 23(1):7-12.
[17] Krasner P, Rankow HJ. Anatomy of the pulp-chamber floor [J]. J Endod, 2004, 30(1): 5-16.
[18] 刘荣芳,冯朝华.上颌第二磨牙根管数目的临床研究[J].北京口腔医学,2009,17(2): 105-106.