Structure/Morphology
The vestibular ligament is covered by a mucosal layer. The combination of the ligament and mucosal layer forms the vestibular fold.
Key Features/Anatomical Relations
The vestibular ligament is formed from the free inferior margin of the quadrangular membrane. It is attached to the internal surface of the thyroid cartilage, inferior to the thyroepiglottic ligament. It courses posteriorly to attach to the arytenoid cartilages, superior to the vocal processes.
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Vestibular Fold
The anterior vestibular fold, known as the mucolabial fold, extends posteriorly on the left and right sides of the oral cavity as the mucobuccal fold to distinguish where the buccal mucosa reflects onto the alveolar bone, which supports the posterior teeth.
