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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    • "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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    • "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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