All of the following structures pierce the buccinator muscle except
Buccinator, the muscle of the cheek. Pierced by Parotid duct Buccal branch of mandibular nerve actions: Flattens cheek against gums and teeth prevents accumulation of food in the vestibule. This is the whistling muscle. Ref BDC volume 3;sixth edition pg 66
Parotid duct
Molar glands of the check
Buccal branch of facial nerve
Buccal branch of the mandibular nerve
Head and neck