ANATOMY

Detailed explanation-1: -The buccinator, along with orbicularis oris and pharyngeal constrictor, forms a functional unit (buccinator mechanism) which is essential for orofacial functions (swallowing, sucking, whistling, chewing, vowel pronunciation).

Detailed explanation-2: -The buccinator is the main component of the cheeks along with a considerable amount of subcutaneous fat. The buccal fat pad (of Bichat) covers the outer surface of the deep part of buccinator, separating it from the ramus of mandible, masseter and temporalis muscles.

Detailed explanation-3: -Buccinator muscle protects the food from accumulating in the buccal pouches, prevents injury to buccal mucosa by compressing the cheek, and salivary glands produce saliva for softening the food and initial digestion.

Detailed explanation-4: -Action. Upon contractions, the buccinator pulls the angle of the mouth laterally and presses the cheeks to the teeth, thus decreasing the oral vestibule.