All of the following structures pierce the buccinator muscle Except:
buccal branch of the mandibular nerve Buccinator is the muscle of the cheek. It is a thin quadrilateral muscle which occupies the interval between the maxilla and the mandible. Its upper and lower boundaries are attached to the outer surfaces of the alveolar processes of the maxilla and mandible respectively opposite the molar teeth, and the posterior border is attached to the pterygomandibular raphe. Motor nerve supply of buccinator is the buccal branch of the facial nerve.See the references below in suppo of the answer:Last's anatomy By Chummy S. Sinnatamby, Raymond Jack Last 11/e p364"Buccinator muscle is pierced by the parotid duct opposite the third upper molar tooth. The duct also passes through the buccal fat pad which lies on the outer surface of buccinator and is paicularly prominent is infants, giving them their chubby cheeks. Beneath the fat lie a few small molar glands; their ducts pierce the muscle to open on the mucous membrane of the cheek, which lines the muscle's inner surface and to which muscle fibers are attached."Complications in Cutaneous Surgery By Hugh M. Gloster, Jr. 1/e p25?`Both the buccal branch of the facial nerve and the parotid duct are at risk of injury before they pierce the buccinator muscle."Gray's Anatomy 40/e p542?Buccal branch of the mandibular nerve passes between the two heads of lateral pterygoid. It supplies sensation to the skin over the anterior pa of buccinator and the buccal mucous membrane.
Parotid duct
Molar glands of the cheek
Buccal branch of facial nerve
Buccal branch of the mandibular nerve