Clinical ResearchWorldwide Analyses of Maxillary First Molar Second Mesiobuccal Prevalence: A Multicenter Cone-beam Computed Tomographic Study
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Material and Methods
Twenty-one observers (20 endodontists and 1 dentist with a master's degree in radiology) from 21 different regions evaluated MB2 root canal prevalence in maxillary first molars using preexisting CBCT examinations from private clinics. The principal researcher (J.M.) provided all observers with identical information, including written guidelines, CBCT images with several mesiobuccal root configurations, bibliographic references, deadlines, and a tutorial video giving step-by-step instructions on
Results
The geographic location and the CBCT characteristics of each region are shown in Table 1. The group intraclass correlation coefficient and the percentage of agreement for the primary outcome were 0.95 and 0.91, respectively. A global view of the deidentified intrarater reliability test results are detailed in Supplemental Table S1 (available online at www.jendodon.com).
A total of 5250 maxillary first molars from 3935 patients (1723 males and 2212 females) were included in the study. The average
Discussion
Extensive research has been performed over the years on the maxillary first molar MB2 root canal 4, 5, 6, 14, 15. The methodologies used vary from in vivo techniques such as clinical findings (2), radiographic examinations (16), and CBCT interpretations (17) to ex vivo methodologies such as clearing (18) or micro–computed tomographic imaging 19, 20. These methodologies appear to be valid to study the mesiobuccal root anatomy; however, the research methods used depend on the information to be
Conclusions
Patient demographics may play an important role in the maxillary first molar MB2 canal prevalence. Males and younger patients presented with higher MB2 proportions when compared with females and older patients. Differences in these sample characteristics make it difficult to compare the results among regions. Three-rooted molars presented with a higher MB2 prevalence than 2-rooted molars. The MB2 proportions ranged from 48.0%–97.6% among the regions, with a worldwide global prevalence of 73.8%.
Acknowledgments
The authors deny any conflicts of interest related to this study.
References (40)
- et al.
Prevalence of apical periodontitis in endodontically treated premolars and molars with untreated canal: a cone-beam computed tomography study
J Endod
(2016) - et al.
A 5 yr clinical investigation of second mesiobuccal canals in endodontically treated and retreated maxillary molars
J Endod
(2005) - et al.
Evaluation of root canal configuration of maxillary molars in a Brazilian population using cone-beam computed tomographic imaging: an in vivo study
J Endod
(2014) - et al.
Morphology of maxillary first and second molars analyzed by cone-beam computed tomography in a korean population: variations in the number of roots and canals and the incidence of fusion
J Endod
(2012) - et al.
Worldwide prevalence of mandibular second molar C-shaped morphologies evaluated by cone-beam computed tomography
J Endod
(2017) - et al.
Evaluation of root and canal morphology of maxillary permanent first molars in a North American population by cone-beam computed tomography
J Endod
(2014) Radiographic aids in the detection of extra root canals
Oral Surg Oral Med Oral Pathol
(1974)Root canal anatomy of the human permanent teeth
Oral Surg Oral Med Oral Pathol
(1984)- et al.
Apical constriction: location and dimensions in molars-a micro-computed tomography study
J Endod
(2014) - et al.
Three-dimensional analysis of maxillary first molar mesiobuccal root canal configuration and curvature using micro-computed tomography
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
(2009)
Second canal in mesiobuccal root of maxillary molars is correlated with root third and patient age: a cone-beam computed tomographic study
J Endod
Symmetry of root and root canal morphology of maxillary and mandibular molars in a white population: a cone-beam computed tomography study in vivo
J Endod
Analysis of the root and canal morphologies in maxillary first and second molars in a Chinese population using cone-beam computed tomography
J Endod
Assessment of the second mesiobuccal root canal in maxillary first molars: a cone-beam computed tomographic study
J Endod
A cone-beam computed tomography study of maxillary first permanent molar root and canal morphology in a Chinese population
J Endod
Cone-beam computed tomographic study of root anatomy and canal configuration of molars in a Spanish population
J Endod
Evaluation of root and canal morphology of maxillary permanent molars in an Egyptian population by cone-beam computed tomography
J Endod
Evaluation of the root canal anatomy of maxillary and mandibular premolars in a selected German population using cone-beam computed tomographic data
J Endod
Beijing Da Xue Xue Bao
Survey of anatomy and root canal morphology of maxillary first molars regarding age and gender in an Iranian population using cone-beam computed tomography
Iran Endod J
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