INTRODUCTION: The achievement of successful nonsurgical endodontic therapy relies on the location, disinfection, and obturation of all canals in the root canal system. This study evaluated the ability of the i-CAT cone-beam computed tomography (CBCT) unit (Imaging Sciences International, Hatfield, PA) to accurately identify the presence or absence of the second mesiobuccal canal (MB2) in maxillary first and maxillary second human molars. METHODS: Twenty completely intact maxillary first and second molars were used as test subjects. The existence of the MB2 canal was evaluated by the following three methods: (1) periapical radiograph evaluation, (2) CBCT evaluation, and (3) clinical sectioning evaluation. The evaluation methods were used to compare the accuracy of CBCT scanning and clinical sectioning (gold standard) in the identification of the MB2 canal. RESULTS: The i-CAT CBCT unit accurately identified the presence or absence of the MB2 canal in 78.95% of samples. Statistical analysis showed that there was no significant difference in the ability of CBCT scanning to detect the MB2 canal when compared with the gold standard of clinical sectioning (p > 0.5). CONCLUSION: The results of this in vitro investigation may be interpreted to show that CBCT scanning is a reliable method to detect the MB2 canal when compared with the gold standard of physical sectioning of the specimen. Copyright (c) 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
INTRODUCTION: The achievement of successful nonsurgical endodontic therapy relies on the location, disinfection, and obturation of all canals in the root canal system. This study evaluated the ability of the i-CAT cone-beam computed tomography (CBCT) unit (Imaging Sciences International, Hatfield, PA) to accurately identify the presence or absence of the second mesiobuccal canal (MB2) in maxillary first and maxillary second human molars. METHODS: Twenty completely intact maxillary first and second molars were used as test subjects. The existence of the MB2 canal was evaluated by the following three methods: (1) periapical radiograph evaluation, (2) CBCT evaluation, and (3) clinical sectioning evaluation. The evaluation methods were used to compare the accuracy of CBCT scanning and clinical sectioning (gold standard) in the identification of the MB2 canal. RESULTS: The i-CAT CBCT unit accurately identified the presence or absence of the MB2 canal in 78.95% of samples. Statistical analysis showed that there was no significant difference in the ability of CBCT scanning to detect the MB2 canal when compared with the gold standard of clinical sectioning (p > 0.5). CONCLUSION: The results of this in vitro investigation may be interpreted to show that CBCT scanning is a reliable method to detect the MB2 canal when compared with the gold standard of physical sectioning of the specimen. Copyright (c) 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.