The Journal of Contemporary Dental Practice

Register      Login



Volume / Issue

Online First

Related articles

VOLUME 20 , ISSUE 2 ( February, 2019 ) > List of Articles


An In Vivo Study: Location and Instrumentation of the Second Mesiobuccal Canal of the Maxillary Second Molar

Keywords : Endodontic anatomy, Maxillary second molars, Second mesiobuccal canal

Citation Information : An In Vivo Study: Location and Instrumentation of the Second Mesiobuccal Canal of the Maxillary Second Molar. J Contemp Dent Pract 2019; 20 (2):131-135.

DOI: 10.5005/jp-journals-10024-2487

License: CC BY-NC 4.0

Published Online: 01-12-2018

Copyright Statement:  Copyright © 2019; The Author(s).


Aim: The first purpose of this retrospective observational in vivo study was to determine the incidence of the second mesiobuccal canal (MB2) in maxillary second molars. The second purpose was to propose a modern shaping procedure able to transform a difficult canal, like MB2, into a normal canal. Materials and methods: This study was led from September 2016 to December 2017, for 15 months. It was conducted on fifty-seven successive cases of root canal therapy on maxillary second molars. All procedures were done in conformity with the current state of the art practices in endodontics. These included rigorous clinical and radiographic pre-access analysis, appropriate tooth restoration to ensure watertight rubber dam installation, surgical microscopic manipulations for precision, the systematic use of ultrasonic endodontic tips to manage the access cavity preparation, and a modern step down technique to shape MB2. Results: Fifty-seven maxillary second molars were treated: 3.5% had one canal, 7.0% two canals, 24.6% three canals; 64.9% four canals (MB2 presence). Weine's method was used to classify mesiobuccal root canal morphology: 27.4% had a type I canal configuration, 35.3% type II, 37.2% type III canal configuration. Conclusion: The perfect knowledge of endodontic anatomy, a painstaking pre-access analysis of the preoperative radiographs, the systematic identification of the CEJ, using a periodontal probe, the use of surgical microscope coupled with the use of specific endodontic ultrasonic tips and the use of a modern step-down technique allows a high accuracy of the access cavity preparation, canal localization and instrumentation. Clinical significance: The rate of MB2 localization and instrumentation on maxillary second molars by our surgical protocol is high. The clinician should take the necessary time to locate and negotiate the MB2. The lack of its location can provoke the failure of endodontic treatment.

PDF Share
  1. Hess W. The anatomy of the root-canals of the teeth of the permanent dentition, part 1. New York: William Wood and Co; 1925.
  2. Fogel HM, Peikoff MD, Christie WH. Canal configuration in the mesiobuccal root of the maxillary first molar : a clinical study. J Endod 1994 Mar;20(3):135-137.
  3. Gilles J, Reader A. An SEM investigation of the mesiolingual canal in human maxillary first and second molars. Oral Surg Oral Med Oral Pathol 1990 Nov;70(5):638-643.
  4. Alaçam T, Tinaz AC, Genç O, Kayaoglu G. Second mesiobuccal canal detection in maxillary first molars using microscopy and ultrasonics. Aust Endod J 2008 Dec;34(3):106-109.
  5. Krasner P, Rankow J. Anatomy of the Pulp-chamber Floor. J Endod 2004 Jan;30(1):5-16.
  6. Neaverth EJ, Kotler LM, Kaltenbach RF. Clinical investigation (in vivo) of endodontically treated maxillary first molars. J Endod 1987 Oct;13(10):506-512.
  7. Pecora JD, Woelfel JB, Sousa Neto MD, Issa EP. Morphologic Study of de Maxillary Molars Part II: Internal Anatomy. Braz Dent J 1992;3(1):53-57.
  8. Stropko JJ. Canal morphology of maxillary molars : clinical observations of canal configurations. J Endod 1999 Jun;25(6):446-450.
  9. Eskoz N, Weine FS. Canal configuration of the mesiobuccal root of the maxillary second molar. J Endod 1995 Jan;21(1):38-42.
  10. Kulild JC, Peters DD. Incidence and configuration of canal systems in the mesiobuccal root of maxillary first and second molars. J Endod 1990 Jul;16(7):311-317.
  11. Buhrley LJ, Barrows MJ, BeGole EA, Wenckus CS. Effect of Magnification on Locating the MB2 Canal in Maxillary Molars. J Endod 2002 Apr;28(4):324-327.
  12. Walton R, Torabinejad M. Principles and practice of endodontics. 2nd ed. Philadelphia: W.B. Saunders Co; 1996.
  13. Favieri A, Barros FG, Campos LC. Root canal therapy of a maxillary first molar with five root canals: case report. Braz Dent J 2006 May;17(1):75-78.
  14. Cleghorn BM, Christie WH, Dong CC. Root and root canal morphology of the human permanent maxillary first molar: a literature review. J Endod 2006 Sep;32(9):813-821.
  15. Vasudev SK, Goel BR. Endodontic Miscellany : Negotiation and management of MB2 canal in maxillary second molar. Endodontology 2003;15:33-36.
  16. Ibarrola J, knowles K, ludlow M, McKinley B. Factor affecting the negotiability of second mesiobuccal canals in maxillary molars. J Endod 1997 Apr;23(4):236-238.
  17. Sener S, Cobankara FK, Akgünlü F. Calcifications of the pulp chamber: prevalence and implicated factors. Clin Oral Investig 2009 Jun;13(2):209-215.
  18. Plotino G, Pameijer CH, Grande NM, Somma F. Ultrasonics in endodontics: a review of the literature. J Endod 2007 Feb;33(2):81-95.
  19. Ruddle CJ. MB2 Root Canal Systems in Maxillary First Molars. Dent Today 1995 May;14(5):38:40-41.
  20. Mancino D, Kharouf N. Root canal treatment of dilacerated second maxillary premolars: Planning the shaping procedure. J Clin Exp Dent 2018 Jun;10(6):e624-e627.
  21. Peters OA. Current Challenges and Concepts in the Preparation of Root Canal Systems: A Review. J Endod 2004 Aug;30(8):559-567.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.