These are all surgical diseases and are to a large extent inter
dependent. The impaction of the calculus in the duct leads to
overdistension of the duct posterior to the obstruction, and the rupture
or incision of the distended duct, determines the fistula. It is only
necessary here to point out the seat of these lesions: the distended
sublingual ducts constituting a more or less rounded swelling to one
side of the frænum lingui, the Whartonian duct forming a tense rounded
cord from the papilla back of the lower incisor teeth backward on the
inner side of the lower jaw, and the Stenonian duct forming a similar
tense cord from near the middle of the cheek down around the lower
border of the jaw in company with the submaxillary artery and backward
on the inner side of its curved border to the parotid gland.
For the more precise lesions, symptoms and treatment of these, see a
work on surgery.