Topics

Topic

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inferior alveolar artery

The inferior alveolar artery is a vital branch of the maxillary artery that supplies blood to the lower jaw (mandible), mandibular teeth, and related structures. Running within the mandibular canal, it plays a crucial role in dental and maxillofacial health. Its course, anatomical relations, and imaging characteristics are important for dental surgeons, radiologists, and clinicians assessing mandibular pathology or planning surgical interventions.

Synonyms

  • Mandibular artery

  • Inferior dental artery

  • IAA

Function

  • Supplies arterial blood to the mandible (lower jaw)

  • Provides vascular supply to mandibular teeth, gums, and chin

  • Sends the mental branch (mental artery) through the mental foramen to supply the chin and lower lip

  • Gives off dental and peridental branches to the teeth and periodontal ligament

MRI Appearance

T1-weighted Images:

  • Appears as a flow void (dark linear/round structure) within the mandibular canal due to rapid blood flow

  • Surrounding fat in the mandibular canal appears bright, helping to delineate the artery

T2-weighted Images:

  • Also seen as a flow void within the mandibular canal

  • Adjacent neurovascular bundle may be visualized

  • May enhance with contrast if pathological conditions are present

STIR (Short Tau Inversion Recovery):

  • Artery maintains a flow void

  • High sensitivity for adjacent soft tissue edema or pathology

  • Helps to differentiate vascular structures from inflammatory changes

CT Appearance

  • Visualized as a small round/oval low-attenuation structure within the mandibular canal

  • Bony canal (inferior alveolar canal) is clearly delineated, often used to locate the artery’s course

  • Contrast-enhanced CT may help visualize the artery as a hyperdense structure within the canal

MRI images

inferior alveolar artery coronal mri image

MRI images

inferior alveolar artery axial mri image