Journal of Conservative Dentistry
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Year : 2020  |  Volume : 23  |  Issue : 1  |  Page : 51-56

To assess the occurrence of middle mesial canal using cone-beam computed tomography and dental operating microscope: An in vitro study

1 Department of Conservative Dentistry and Endodontics, Chettinad Dental College and Rsearch Institute, Kancheepuram, Tamil Nadu, India
2 Department of Conservative Dentistry and Endodontics, A. B. Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India

Correspondence Address:
Dr. Manjiri Nagesh Honap
TVH Ouranya Bay, Tower 4, Flat 4252, Padur OMR, Chennai - 603 103, Tamil Nadu
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JCD.JCD_462_19

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Introduction: Failures of root canal treatments are mainly attributed to missed canals and ignorance about the complex anatomy of the root canal system. One such example of anatomic variation is the middle mesial canal (MMC) in mandibular molars which is often missed, and literature on methods for identifying them is limited. Aim: This in vitro study aimed to assess the occurrence of MMCs with cone-beam computed tomography (CBCT) and then under magnification in the mandibular first and second molars. Materials and Methodology: A total of 120 extracted intact human permanent mandibular first and second molars were selected. These were subjected to CBCT imaging and magnification for the detection of MMCs. The percentage of incidence in the detection of MMC was compared between these two methods. Results: The incidence of MMC detected in mandibular molars using CBCT was 13.33% (16 of 120 teeth), while using a dental operating microscope, the incidence was 18.33% (22 of 120 teeth) and the comparison between the two methods was statistically not significant. Conclusions: Since the incidence of MMC was higher with the use of a microscope, it is preferred to use simpler, chairside aids like magnification and ultrasonic troughing. On the other hand, one should be judicious while subjecting a case to preoperative CBCT evaluation owing to its ionizing radiation.

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