Bifid Mandibular Canals Incidence and Anatomical Variations in the Population of Shanghai Area by Cone Beam Computed Tomography

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The aim of this study was to analyze the rate, location, and characteristics of bifid mandibular canals (BMCs) in the population of the Shanghai area using cone beam computed tomography to avoid complications during surgical procedures.


Two hundred eighty patients were recruited for this study, and the presence and morphology of BMCs were evaluated.


The occurrence rate of BMCs in the Shanghai area was relatively high compared with that in other populations, reaching 31.1%. In addition, the study also found some far less-common trifid mandibular canals, as well as a peculiarly shaped special type, which we called v-type canal that has yet to be described.


Our study underlined the different characteristics and occurrence rates of BMCs in the population of the Shanghai area and the importance of using cone beam computed tomography for a reliable detection, providing useful information to help prevent presurgery and postsurgery complications.

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