Worldwide Prevalence of Mandibular Second Molar C-Shaped Morphologies Evaluated by Cone-Beam Computed Tomography
| Autor: | Ruben Rosas Aguilar, Murilo von Zuben, Daniel Flynn, Miguel Seruca Marques, Jojo Kottoor, Luiza Berti, Imran Cassim, Yongchun Gu, António Ginjeira, Adam Monroe, Jose Antonio Gonzalez, Jorge N.R. Martins |
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| Rok vydání: | 2017 |
| Předmět: |
Molar
Adult Male Cone beam computed tomography Independent group Root canal Dentistry Computed tomography Mandible Global Health Mandibular second molar 03 medical and health sciences 0302 clinical medicine C shaped medicine Prevalence Radiography Dental Humans General Dentistry Orthodontics medicine.diagnostic_test business.industry 030206 dentistry Intra-rater reliability Cone-Beam Computed Tomography medicine.anatomical_structure Cross-Sectional Studies 030220 oncology & carcinogenesis Female business |
| Zdroj: | Journal of endodontics. 43(9) |
| ISSN: | 1878-3554 |
| Popis: | Introduction The aim of this study was to evaluate and compare the C-shaped mandibular second molar prevalence in different regions around the world with the aid of cone-beam computed tomography technology. Methods Nine field observers from 9 different geographic regions were calibrated. A total of 400 samples were collected in each region. The prevalence of C-shaped anatomy was calculated. The number of roots and the configuration of the C-shaped canals at 3 different axial levels were also evaluated. The z -test was used to analyze the difference between the means of each independent group. Intrarater reliability was also tested. Results A total of 3600 teeth from 2735 patients were included in this research; 499 teeth presented C-shaped root canal configuration, representing a global prevalence of 13.9%. China had a prevalence of 44.0%, which was significantly higher than any other region. The C-shape prevalence in women was 16.5%, which was significantly higher than the 10.4% prevalence found in men. No difference between sides (37 or 47) was evident in the global sample. Conclusions Cone-beam computed tomography is a valuable tool to evaluate the C-shaped root canal configuration in vivo . In the present study, China presented the highest prevalence of C-shaped mandibular second molars when compared with other regions. Women exhibited a higher prevalence than men. |
| Databáze: | OpenAIRE |
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