Floor of Mouth

The floor of the mouth, also called “diaphragma oris,” includes the soft tissues between the medial aspect of the mandibular body and the hyoid bone. As such, it represents the inferior border of the oral cavity. Four of the six large salivary glands are associated with the floor of the mouth, i.e., the sublingual and submandibular glands. The main muscles contributing to the floor of the mouth include the mylohyoid and the geniohyoid muscles. The major arterial supply to the floor of the mouth is provided by the sublingual and submental arteries.