This is Mike Brennan,
I am Professor and Chair
at the department of Oral Medicine
at Carolinas Medical Center
in Charlotte, North Carolina.
Today, I'm going to talk about "Dry Mouth".
The objectives for today's lecture
are first, to define and describe
the different causes of dry mouth.
Second, is to define and describe
how to diagnose dry mouth.
Third, define and describe
the oral manifestations of dry mouth.
And lastly, we'll describe
management strategies for dry mouth.
When we talk
about the production of saliva,
the healthy adult produces approximately
1.5 liters of saliva in 24 hours.
The saliva comes from
three major pairs of salivary glands:
the parotid gland,
the submandibular gland,
and the sublingual gland.
In addition to these
three major salivary glands,
there are numerous
minor salivary glands,
approximately 750. They are located
all throughout the mouth,
except for the gingiva
and the anterior hard palate.
This current slide represents
of the major salivary glands.
As you can see,
we have the parotid gland,
underneath at the jaw
is the submandibular gland,
and little bit further anterior to that,
is the sublingual gland.
Approximately 45% of the saliva
is produced by the parotids
and another 45%
from the submandibular glands.
The remaining saliva is produced
by the sublingual glands
and the minor salivary glands.
The sublingual and minor salivary glands
produce more of a thicker type
of mucous secretion.
Whereas, the parotid gland produces a
more watery type of saliva.
And the submandibular gland
is more of a watery
and a thick mucous type secretion.
When we talk about the amount of saliva,
salivary hypofunction or low salivary
output is described as,
the unstimulated whole salivary flow
at less than 1.5 ml in 15 minutes;
and the stimulated whole salivary flow
at less than 10.5 ml in 15 minutes,
with the use of this diagnostic test.