Mesiobuccal root canal anatomy of Korean maxillary first and second molars by cone-beam computed tomography

Department of Conservative Dentistry, Dental Research Inst, School of Dentistry, Seoul National University, Seoul, Repubic of Korea.
Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology (Impact Factor: 1.46). 03/2011; 111(6):785-91. DOI: 10.1016/j.tripleo.2010.11.026
Source: PubMed


The aim of this study was to investigate the types of canal configurations and the incidence of a second mesiobuccal (MB2) canal in Korean maxillary molar mesiobuccal (MB) roots by analyzing cone-beam computed tomographic (CBCT) images.
Three-dimensional CBCT images of 458 maxillary first molars and 467 second molars from 276 Korean patients were analyzed to determine the incidence of an MB2 canal, the types of canal configurations, and the correlations between the incidence of an MB2 canal and age, gender, and tooth position.
The incidence of 2-canaled MB roots was 71.8% in first molars and 42.2% in second molars, with the most common configurations being Weine types III and II. The frequency of an MB2 canal decreased with age in both molars (P < .05).
Types III and II canal configurations were the most prevalent in the 2-canaled MB roots of Korean maxillary molars.

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Available from: Kee-Yeon Kum, Feb 28, 2014
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    • "Regarding the mesiobuccal root, in a combine sample of 8399 roots from 34 laboratorial and clinical studies it was possible to identify one canal (MB1) in 43.1 % of the cases and two canals or more in 56.8 %. Two CBCT studies from Kim et al., [6] (n=814) and Lee et al., [1] (n=458), and a µ-CT study from Kim et al., [3] (n=154) reported an incidence of MB3 in 0.1 %, 1.3 % and 12 % respectively. The distobuccal root review by Cleghorn et al., [5] [table/Fig-3]: Pulp chamber floor after root canal filling [table/Fig-4]: Final endodontic treatment radiograph. "
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    ABSTRACT: The most common configuration of the maxillary first molar is the presence of three roots and four root canals, although the presence of several other configurations have already been reported. The objective of this work is to present a rare anatomic configuration with seven root canals diagnosed during an endodontic therapy. Endodontic treatment was performed using a dental operating microscope. Exploring the grooves surrounding the main canals with ultrasonic troughing was able expose unexpected root canals. Instrumentation with files of smaller sizes and tapers was performed to prevent root physical weakness. The anatomic configuration was confirmed with a Cone Beam Computer Tomography image analysis which was able to clearly show the presence of seven root canals. An electronic database search was conducted to identify all the published similar cases and the best techniques to approach them are discussed.
    Journal of Clinical and Diagnostic Research 06/2014; 8(6):ZD13-5. DOI:10.7860/JCDR/2014/8229.4493 · 0.23 Impact Factor
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    • "The series of studies which reported the maxillary first molar MB root canal configurations of Korean populations showed two interesting and clinically important findings.1,11,18,25,44 One is that they showed the ethnic differences in the root canal morphology of MB root canals in maxillary first molars. "
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    ABSTRACT: A common failure in endodontic treatment of the permanent maxillary first molars is likely to be caused by an inability to locate, clean, and obturate the second mesiobuccal (MB) canals. Because of the importance of knowledge on these additional canals, there have been numerous studies which investigated the maxillary first molar MB root canal morphology using in vivo and laboratory methods. In this article, the protocols, advantages and disadvantages of various methodologies for in-depth study of maxillary first molar MB root canal morphology were discussed. Furthermore, newly identified configuration types for the establishment of new classification system were suggested based on two image reformatting techniques of micro-computed tomography, which can be useful as a further 'Gold Standard' method for in-depth morphological study of complex root canal systems.
    02/2013; 38(1):2-10. DOI:10.5395/rde.2013.38.1.2
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