The crown of the mandibular canine usually presents proportionally longer and narrower compared to the maxillary canine. The mesial surface  of this tooth is relatively flat, and it is more continuous with the mesial surface of the root, while the lingual surface usually is more concave. But the entire lingual anatomy is not well defined and tends to be smoother. 

The cingulum of the mandibular canine is proportionally smaller, and there are deeper proximal root concavities on the roots of the mandibular canines again compared to the maxillary canines. The mandibular canine sometimes can present with two roots because the previously mentioned concavities can be very deep. If the mandibular canine presents with two roots, they are named the buccal and lingual roots. 

Also, in contrast to the maxillary canines, there is no notch on the facial outline on the cemento-enamel junction of the mandibular canine.

Sometimes a mandibular canine can be confused with the maxillary lateral incisor. It happens if the cusp of the mandibular canine becomes worn and flat. Both teeth can be distinguished by several major features, such as the distobuccal line angle, which is more rounded at the cervical in the canines. Also, the cross-section study of the incisal surface of the incisor is more rectangular or even ribbon-shaped, while it is diamond-shaped in the canine. And finally, both teeth can be distinguished by the shape of the root.

The height of the contour of the mandibular canine is as follows:

• Mesial - incisal third;

• Distal -  middle third;

• Facial (labial) - close to the cervical line;

• Lingual - close to the cervical line.