Worldwide Analyses of Maxillary First Molar Second Mesiobuccal Prevalence: A Multicenter Cone-beam Computed Tomographic Study
Maxillary 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 co...
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| Published in: | Journal of endodontics Vol. 44; no. 11; p. 1641 |
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| Language: | English |
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01.11.2018
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| ISSN: | 1878-3554, 1878-3554 |
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| Abstract | Maxillary 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.
Observers 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.
The 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.
MB2 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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| AbstractList | Maxillary 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.
Observers 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.
The 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.
MB2 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. Maxillary 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.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.Observers 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.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.The 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.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.MB2 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.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. |
| Author | Plotino, Gianluca Alkhawas, Moataz-Bellah A M Bellardini, Gianmarco Berti, Luiza Flynn, Daniel Zhang, Yuerong Gu, Yongchun Chaniotis, Antonis Kottoor, Jojo Ginjeira, António Seedat, Hussein C Monroe, Adam Gonzalez, Jose Antonio Santiago, Fábio Parashos, Peter Altaki, Zaher Ragnarsson, Magnús F Vargas, Walter Ounsi, Hani F Aguilar, Ruben Rosas von Zuben, Murilo Boveda, Carlos Marques, Miguel Seruca Martins, Jorge N R |
| Author_xml | – sequence: 1 givenname: Jorge N R surname: Martins fullname: Martins, Jorge N R email: jnr_martins@yahoo.com.br organization: Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal; Instituto de Implantologia, Lisbon, Portugal. Electronic address: jnr_martins@yahoo.com.br – sequence: 2 givenname: Moataz-Bellah A M surname: Alkhawas fullname: Alkhawas, Moataz-Bellah A M organization: Department of Endodontics, Al-Azhar University Faculty of Dental Medicine, Cairo, Egypt – sequence: 3 givenname: Zaher surname: Altaki fullname: Altaki, Zaher organization: Department of Endodontics, Damascus University, Damascus, Syria – sequence: 4 givenname: Gianmarco surname: Bellardini fullname: Bellardini, Gianmarco organization: Private Practice, Latina, Italy – sequence: 5 givenname: Luiza surname: Berti fullname: Berti, Luiza organization: Department of Radiology, Faculdade de Odontologia São Leopoldo Mandic, Campinas, Brazil – sequence: 6 givenname: Carlos surname: Boveda fullname: Boveda, Carlos organization: Department of Endodontics, Faculty of Dentistry, Universidad Central de Venezuela, Caracas, Venezuela – sequence: 7 givenname: Antonis surname: Chaniotis fullname: Chaniotis, Antonis organization: Private Practice, Athens, Greece – sequence: 8 givenname: Daniel surname: Flynn fullname: Flynn, Daniel organization: Private Practice, London, England – sequence: 9 givenname: Jose Antonio surname: Gonzalez fullname: Gonzalez, Jose Antonio organization: Departamento de Endodoncia y Conservadora, Facultad de Odontología, Universitat Internacional de Catalunya, Barcelona, Spain – sequence: 10 givenname: Jojo surname: Kottoor fullname: Kottoor, Jojo organization: Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Science, Kothamangalam, Kerala, India – sequence: 11 givenname: Miguel Seruca surname: Marques fullname: Marques, Miguel Seruca organization: Private Practice, Amsterdam, The Netherlands – sequence: 12 givenname: Adam surname: Monroe fullname: Monroe, Adam organization: Private Practice, San Diego, California – sequence: 13 givenname: Hani F surname: Ounsi fullname: Ounsi, Hani F organization: Department of Restorative Dentistry and Endodontics, Lebanese University, Beirut, Lebanon; Department of Endodontics and Restorative Dentistry, Siena University, Siena, Italy – sequence: 14 givenname: Peter surname: Parashos fullname: Parashos, Peter organization: Melbourne Dental School, University of Melbourne, Melbourne, Australia – sequence: 15 givenname: Gianluca surname: Plotino fullname: Plotino, Gianluca organization: Private Practice, Rome, Italy – sequence: 16 givenname: Magnús F surname: Ragnarsson fullname: Ragnarsson, Magnús F organization: Private Practice, Hafnarfjördur, Iceland – sequence: 17 givenname: Ruben Rosas surname: Aguilar fullname: Aguilar, Ruben Rosas organization: Department of Endodontics, Escuela Nacional de Estudios Superiores Universidad Nacional Autónoma de México, León, México – sequence: 18 givenname: Fábio surname: Santiago fullname: Santiago, Fábio organization: Private Practice, Paris, France – sequence: 19 givenname: Hussein C surname: Seedat fullname: Seedat, Hussein C organization: Private Practice, Durban, South Africa – sequence: 20 givenname: Walter surname: Vargas fullname: Vargas, Walter organization: Private Practice, San Jose, Costa Rica – sequence: 21 givenname: Murilo surname: von Zuben fullname: von Zuben, Murilo organization: Private Practice, Brussels, Belgium – sequence: 22 givenname: Yuerong surname: Zhang fullname: Zhang, Yuerong organization: Department of Conservative Dentistry and Endodontics, School of Stomatology, Nanjing Medical University, Nanjing, China – sequence: 23 givenname: Yongchun surname: Gu fullname: Gu, Yongchun organization: Department of Dentistry and Central Lab, The First People's Hospital of Wujiang District, Nantong University, Suzhou, China – sequence: 24 givenname: António surname: Ginjeira fullname: Ginjeira, António organization: Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal |
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| Keywords | cone-beam computed tomography morphology Anatomy root canal molar |
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| SubjectTerms | Adult Age Factors Anatomic Variation Cone-Beam Computed Tomography Dental Pulp Cavity - anatomy & histology Dental Pulp Cavity - diagnostic imaging Female Global Health Humans Male Maxilla - anatomy & histology Maxilla - diagnostic imaging Middle Aged Molar - anatomy & histology Molar - diagnostic imaging Prevalence Sex Factors Tooth Root - anatomy & histology Tooth Root - diagnostic imaging Young Adult |
| Title | Worldwide Analyses of Maxillary First Molar Second Mesiobuccal Prevalence: A Multicenter Cone-beam Computed Tomographic Study |
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