Tomographic Evaluation of Accessory Canals Penetrating at the Inner Side of the Anterior Region of Mandibles.

Background: The anterior region of the mandible is generally considered to be a safe region to invasive procedures; however, on its internal face, uncountable penetrating canals may be encountered. Objective: To perform morphometrical and topographical analysis of endosseous canals located at the inner side of the mandibular anterior region, using cone-beam computed tomography. Methods: Forty-six examinations were digitally analyzed. Localization of canals in relation to the midline, trajectories, communications between other anatomic structures and relation with teeth were evaluated. Longitudinal and transversal diameters of the canals and distances to the lower edge and symphysis of the mandible were also measured. Results: All individuals had at least 1 canal, with a mean of 2.3 and higher prevalence in the midline region. The adjacent teeth to the canals were usually the incisors but the authors could not determine the connected anatomical structure in most patients. Both the mean diameters were quite similar, about 1 mm; however, the trajectories and distances to the lower edge and symphysis of mandible showed a remarkable heterogeneity among the individuals. Conclusions: These endosseous canals are consistent and clinically relevant findings and should never be underestimated by professionals. (C) 2016 by Mutaz B. Habal, MD.

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