ANATOMY

Detailed explanation-1: -Origin. The fibers of the buccinator arise from the pterygomandibular raphe and alveolar processes of the maxilla and mandible at the region of the first and second molar teeth.

Detailed explanation-2: -The buccinator muscle is pierced by the parotid duct (Stenson’s duct) after it crosses the masseter muscle and turns medially at the anterior border of the muscle to open in the oral cavity into a small papilla opposite the maxillary second molar.

Detailed explanation-3: -It is not a primary muscle of mastication-it does not move the jaw-and this is reflected in its motor innervation from the facial nerve.

Detailed explanation-4: -The masseter muscle provides powerful elevation and protrusion of the mandible by originating from the zygomatic arch and inserting along the angle and lateral surface of the mandible. The temporalis muscle originates from the floor of the temporal fossa and inserts onto the coronoid process of the mandible.