Relation between lingual nerve, submandibular gland duct and mandibular body in the sublingual space.

It was shown that the crossing of the duct of the submandibular gland and of the lingual nerve appeared constantly in the close vicinity of the upper surface of the posterior portion of the mylohyoid muscle closely to the inner surface of the mandible within the range of the third permanent molar. In the lateral view the nerve/duct crossing is projected on the external mandibular surface distally from the retrotrigonal triangle into the rounded region where the mandibular body and mandibular branch are fused.