Anatomy and cannulation of the parotid duct in the dog.

The course of the dog's parotid duct is more complex than previously reported. The newly described features are that the duct has 2 right-angle curves in its terminal part and that it perforates the fascia and mucosa of the cheek between the orbicularis oris and buccinator muscles. The duct does not perforate the buccinator muscle. Based on these findings, a rapid and reliable technique for intubation of the duct was developed.