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The otic notch is angular and the tabular horns are posteriorly directed and are recurved distally. The mandible is slender with a distinct post glenoid area and a well-developed, hamate process. The prearticular is separated from the splenial by the dentary and the coronoid series. The hemi-mandible is low.
The anterior margin of sternocleidomastoid Superior boundary (base) The lower border of the body of the mandible, and a line extending from the angle of the mandible to the mastoid process
The function of the sphenomandibular ligament is to limit distension of the mandible in an inferior direction. It is slack when the temporomandibular joint (TMJ) is in closed position; it is taut when the condyle of the mandible is situated anterior to the temporomandibular ligament. [2]
The mylohyoid line is a bony ridge on the internal surface of the body of the mandible. The mylohyoid line extends posterosuperiorly. The mylohyoid line continues as the mylohyoid groove on the internal surface of the ramus. The mylohyoid muscle originates from the anterior (front) part of the mylohyoid line. [1]
The margin of this opening is irregular; it presents in front a prominent ridge, surmounted by a sharp spine, the lingula of the mandible, which gives attachment to the sphenomandibular ligament; at its lower and back part is a notch from which the mylohyoid groove runs obliquely downward and forward, and lodges the mylohyoid vessels and nerve. [6]
It is located between the lateral aspect of the mandible and the medial aspect of the masseter muscle and its investing fascia. The term is derived from sub-meaning "under" in Latin and masseteric which refers to the masseter muscle. The submasseteric space is one of the four compartments of the masticator space. [1]
The facial artery's pulse can be palpated against the mandible at this location. [ 4 ] [ 5 ] Certain craniofacial syndromes , such as hemifacial microsomia , can result in asymmetry or underdevelopment of the mandible, which may affect the appearance and prominence of the antegonial notch on the affected side. [ 6 ]
The terms alveolar border, alveolar crest, and alveolar margin describe the extreme rim of the bone nearest to the crowns of the teeth. [ 7 ] [ 8 ] [ 9 ] The portion of alveolar bone between two adjacent teeth is known as the interdental septum (or interdental bone).