Worldwide Analyses of Maxillary First Molar Second Mesiobuccal Prevalence: A Multicenter Cone-beam Computed Tomographic Study |
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| Authors: | Jorge NR Martins Moataz-Bellah AM Alkhawas Zaher Altaki Gianmarco Bellardini Luiza Berti Carlos Boveda Antonis Chaniotis Daniel Flynn Jose Antonio Gonzalez Jojo Kottoor Miguel Seruca Marques Adam Monroe Hani F Ounsi Peter Parashos Gianluca Plotino Magnús F Ragnarsson Ruben Rosas Aguilar Fábio Santiago António Ginjeira |
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| Institution: | 1. Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal;2. Instituto de Implantologia, Lisbon, Portugal;3. Department of Endodontics, Al-Azhar University Faculty of Dental Medicine, Cairo, Egypt;4. Department of Endodontics, Damascus University, Damascus, Syria;5. Private Practice, Latina, Italy;6. Department of Radiology, Faculdade de Odontologia São Leopoldo Mandic, Campinas, Brazil;7. Private Practice, Athens, Greece;11. Private Practice, London, England;12. Departamento de Endodoncia y Conservadora, Facultad de Odontología, Universitat Internacional de Catalunya, Barcelona, Spain;8. Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Science, Kothamangalam, Kerala, India;9. Private Practice, Amsterdam, The Netherlands;10. Private Practice, San Diego, California;71. Department of Endodontics and Restorative Dentistry, Siena University, Siena, Italy;112. Melbourne Dental School, University of Melbourne, Melbourne, Australia;123. Private Practice, Rome, Italy;84. Private Practice, Hafnarfjördur, Iceland;95. Department of Endodontics, Escuela Nacional de Estudios Superiores Universidad Nacional Autónoma de México, León, México;106. Private Practice, Paris, France;77. Private Practice, San Jose, Costa Rica;1111. Private Practice, Brussels, Belgium;1212. Department of Conservative Dentistry and Endodontics, School of Stomatology, Nanjing Medical University, Nanjing, China;88. Department of Dentistry and Central Lab, The First People''s Hospital of Wujiang District, Nantong University, Suzhou, China;99. Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal |
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| Abstract: | IntroductionMaxillary first molar second mesiobuccal (MB2) root canal prevalence may change among different populations. The aim of this study was to analyze the worldwide prevalence of the MB2 root canal and understand its possible relation with sex, age, side, and root configuration using in vivo cone-beam computed tomographic (CBCT) assessment.MethodsObservers from 21 regions were calibrated to achieve a similar CBCT assessment methodology and instructed to collect data from 250 maxillary first molars in previously existing examinations. Intra- and interrater reliability tests were performed. The sample size included 5250 molars and was defined by way of a preliminary trial. Data collected included MB2 presence, sex, age, side, number of roots per tooth, and mesiobuccal root configuration. The z test for proportions in independent groups was used to analyze the differences among subgroups. P < .05 was considered significant.ResultsThe worldwide CBCT-assessed MB2 prevalence was 73.8%, ranging from 48.0% in Venezuela to 97.6% in Belgium. The prevalence in males and females was 76.3% and 71.8%, respectively (P < .05). Significantly higher MB2 proportions were found in younger patients and 3-rooted molar configurations. The group intraclass correlation coefficient and the percentage of agreement for the MB2 presence were 0.95 and 0.91, respectively. The intrarater Cohen kappa value was above 0.61 for all observers.ConclusionsMB2 prevalence in the analyzed regions varied widely. The differences may be associated with specificities within each region but also patient demographics. Males, younger patients, and 3-rooted configurations were associated with higher MB2 proportions. |
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| Keywords: | Anatomy cone-beam computed tomography molar morphology root canal |
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