QS Study

Parotid Duct (or Stensen duct) is the duct of the parotid gland opening on the inner surface of the cheek opposite the second upper molar tooth. It is a thick-walled duct about 5 cm long emerges from the middle of the anterior border of the parotid gland. This duct serves as a conduit for saliva between the substance of the parotid gland and the oral cavity.

  • Length: 5 cm long.
  • Origin: Emerges from the middle of the anterior bonier of the parotid gland. It emerges from the gland and runs forward along the lateral side of the masseter muscle. In this course, the duct is surrounded by the buccal fat pad.

Parotid Duct 1

Fig: Parotid Duct

Course:

After origin, it runs forwards & slightly downwards on the masseters, and then it goes medially and pierces the buccinators muscle. Then it runs forwards for a while between buccinators and oral mucosa.

Termination:

It terminates by turning medially & opens into the vestibule of the mouth opposite the crown of the upper 2nd molar tooth. It consists of a thick external fibrous coat which contains contractile fibers, and of an internal or mucous coat lined with short columnar epithelium.

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