Diagnostic Test Study Of Dental Operating Microscope Used For Detecting The Second Mesiobuccal Canal In Extracted Maxillary First Molars

Objective: To estimate the diagnostic potential of the dental operating microscope used for locating the second mesiobuccal canal (MB2) in extracted maxillary first molars. Methods: Fifty eight freshly extracted human maxillary first molars were selected. All the access cavities were prepared on the extracted molars. MB2 canals were examined with dental-CT and under a dental operating microscope. To compare the different of using dental operating microscope and dental-CT to detect the second mesiobuccal canal of extracted maxillary first molars. The discovered incidence of MB2 canals were 65.5% (38/58) and 72.4% (42/58) in DOM and dental-CT groups respectively. Results: The result of DOM and dental-CT are not statistical different (p>0.05). The sensitivity and accuracy of the dental operating microscope were 85.7% and 87.5%. The Youden were 0.732. The Kappa were 0.862. Conclusion: Our study suggested that the dental operating microscope can increased the identification of the MB2 canals. So it is effect to increase the long-term prognosis of root canal treatment of the maxillary first molar.