The Importance of the Magnification Use for the Additional Root Canals Localization at the Second Maxillary Molars

Abstract:

The aim of this study is to highlight the morphology of the second maxillary molars root canals and to draw a comparison between the data obtained with and without magnifying means. The study covered a total of 31 extracted human second maxillary molars. After being examined by a thorough physical exam and an X-ray examination, teeth were trepanned in the place of election. Thereby the access cavity was performed using: a) for the stage of pulp chamber ceiling penetration, a globular diamond bur for the turbine, b) for the stage of broadening access cavity, a cylindrical bur inactive in the head for the opposite-angle piece and c ) a Batt bur for the flaring and finishing stage.Afterwards, the sighting of the main root canals was performed using the endodontic probe or Miller file. Examination and sighting of the additional canals was made under magnification using the dental microscope. The molars with three canals had the highest prevalence of endodontic morphology of two upper molars (90.32%). But there were special cases with two channels morphology (6.45%) and four channels morphology (3.22%). After examining the endodontic space under the microscope, there have been identified and secondary canals, approximately 32.25% of molars examined presenting one or more secondary canals. The anatomy of the most frequent upper second molar was three roots with three root canals; the most common variation in morphology is the presence of an mesiobuccal additional canal (MB2). However, we can encounter an unusual number of canals. The importance of magnification, of the dental microscope in our study cannot be ignored because using only the latter we could highlight the real endodontic morphology of the two upper molars extracted examined, finding additional canals in 32.25% of the molars undergoing examination.

• Periodical: Defect and Diffusion Forum (Volume 376)
• Pages: 89-100
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.376.89
• Online since: July 2017
• Authors: Mihaela Jana Ţuculină*, Sanda Mihaela Popescu, Marilena Bătăiosu, Constantin Dăguci, Cristian Marian Petcu, Horia Octavian Manolea, Ionela Teodora Dascălu, Oana Andreea Diaconu
• Keywords: Cavity Access, Dental Microscope, Magnification, Root Canal

References

[1] Scaffer E. Root canal instruments for manual use: a review. Endod Dent Traumatol 1997; 13; 51-64.

DOI: 10.1111/j.1600-9657.1997.tb00011.x

[2] Weis MV, Parashos P, Messer HH. Effect of obturation technique on sealer cement thickness and dentinal tubule penetration. Int Endod J 2004; 37: 653-663.

DOI: 10.1111/j.1365-2591.2004.00839.x

[3] Krell VK. Canal preparation. In: Johnson WT(ed)Color Atlas of Endodontics, 1st edn. Philadelphia; Saunders 2002: 67-71.

[4] Weine FS, Healey HJ, Gerstein H, Evanson L. Canal configuration in the mesiobuccal root of the maxillary first molar and its endodontic significance. Oral Surg Oral Med Oral Pathol 1969; 28(3): 419-25.

DOI: 10.1016/0030-4220(69)90237-0

[5] Kulid, J.C., Peters, D.D.: Incidence and configuration of canal systems in the mesiobuccal root of maxillary first and second molars. J. Endod. 16(7): 311-7, (1999).

DOI: 10.1016/s0099-2399(06)81940-0

[6] Pécora JD, Woelfel JB, Sousa Neto MD, Issa EP. Morphologic study of the maxillary molars. Part II: internal anatomy. Braz Dent J 2002; 3(1): 53-7.

[7] Somma F, Leoni D, Plotino G, et al. Root canal morphology of the mesiobuccal root of maxillary first molars: a micro-computed tomographic analysis. Int Endod J, 2009; 42(2): 165-74.

DOI: 10.1111/j.1365-2591.2008.01472.x

[8] Park E, Chehroudi B., Coil J M. Identification of possible factors impacting dental students' ability to locate MB2 canals in maxillary molars. Journal of Dental Education May 1, 2014 vol. 78 no. 5, 789-795.

DOI: 10.1002/j.0022-0337.2014.78.5.tb05731.x

[9] Eskoz N, Weine FS. Canal configuration of the mesiobuccal root of the maxillary second molar. J Endod 1995; 21(1): 38-42.

DOI: 10.1016/s0099-2399(06)80555-8

[10] AAE Position Statement Use of Microscopes and Other Magnification Techniques, (2012).

[11] Fava, L.R., Weinfeld, I., Fabri, F.P., Pais, C.R.: Four second molars with single roots and single canals in the same patient. Int. Endod. J.: 33: 138, (2000).

DOI: 10.1046/j.1365-2591.2000.00272.x

[12] Alavi A. M, A. Opasanon, Y-L. Ng&K. Gulabivala, Root canal morphology of Thai maxillary molars, International Journal, 35, 478-485, (2002).

DOI: 10.1046/j.1365-2591.2002.00511.x

[13] Deveaux, E.: Maxillary second molar with two palatal roots. J. Endod. 25: 571, (1999).

DOI: 10.1016/s0099-2399(99)80383-5

[14] Jacobsen, E.L.: Unusual palatal root canal morfology in maxillary molars. Endod. Dent. Traumatol. 10: 19, (1994).

DOI: 10.1111/j.1600-9657.1994.tb00593.x

[15] Anurag S., Anuraag G, Chandrawati G, Sumit M , Elusive Canals - An Endodontic Enigma, Indian Journal of Dental Sciences, October 2012 Supplementary Issue, Issue: 4, Vol.: 4, 141-146.

[16] Khayat, G, The use of magnification in endodontic therapy. The Operating Microscope, Pract. Periodont, Aestet Dent1998, 10(1), 137-144.

[17] Gary B. Carr, Arnaldo Castellucci. The Use of the Operating Microscope in Endodontics. Endod 2004; 31(2): 32-33.

[18] Schwarze T, Baethge C, Stecher T, Geurtsen W. Identification of second canals in the mesiobuccal root of maxillary first and second molars using magnifying loupes or an operating microscope. Aust Endod J 2002; 28(2): 57-60.

DOI: 10.1111/j.1747-4477.2002.tb00379.x

[19] Buhrley LJ, Barrows MJ, BeGole EA, Wenckus CS. Effect of magnification on locating the MB2 canal in maxillary molars. J Endod 2002; 28(4): 324-7.

DOI: 10.1097/00004770-200204000-00016

[20] Alacam T, Tinaz AC, Genc O, Kayaoglu G. Second mesiobuccal canal detection in maxillary first molars using microscopy and ultrasonics. Aust Endod J 2008; 34: 106-9.

DOI: 10.1111/j.1747-4477.2007.00090.x

[21] Fogel HM, Petkoff MD, Christie WH(1994) Canal configuration in the mesiobuccal root of the maxillary first molars: a clinical study. Journal of Endodontics 20, 135-7.

DOI: 10.1016/s0099-2399(06)80059-2

[22] Stropko JJ(1999) Canal morphology of maxillary molars: clinical observations of canal configuration. Journal of Endodontics 25, 446-50.

DOI: 10.1016/s0099-2399(99)80276-3

[23] Sempira HN, Hartwe l l GR., 2000, Sempira HN, Hartwe l l GR. Frequency of second mesiobuccal canals in maxillary molars as determined by use of an operating microscope: a clinical study. J Endod, 2000; 26: 673- 4.

DOI: 10.1097/00004770-200011000-00010

[24] Görduysus MO¨, Görduysus M, Friedman S (2001) Operating microscope improves negotiation of second mesiobuccalcanals in maxillary molars. Journal of Endodontics 27, 683–6.

DOI: 10.1097/00004770-200111000-00008

[25] Rampado ME, Tjäderhane L, Friedman S and Hamstra SJ (2004). The benefit of the operating microscope for access cavity preparation by undergraduate students. JEndod, 30: 863-867.

DOI: 10.1097/01.don.0000134204.36894.7c

[26] Lane AJ. The course and incidence of multtple canals in the mesiobuccal root of the maxillary first molar. J Br Endod Soc 1974; 7: 9-11.

[27] Ibarrola J, Knowles K, Ludlow M, McKinley B Jr. Factors affecting the negotiability of'second mesiobuccal canals in maxillary molars. J Endodon 1997; 23: 236-8.

DOI: 10.1016/s0099-2399(97)80054-4