More how to draw manga - vol. 02 - Penning characters

Revealing the Teeth:
Exaggeration through Realistic Portrayal
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Here we see a relatively nonstylized,
realistic portrayal. The teeth are
rendered as a solid row rather than
individually.
To shout, the mouth opens widely,
exposing the bottom teeth and tongue.
Use simple lines to render them.
Here we see another shouting
mouth. A large expanse of the
lower jaw is visible.
The canines
When the mouth
is wide open, the
inside flesh of the
cheek swells.
-ere, a center line has been added to the
":'ngue, heightening the realism. Since the
-:uth is wide open, the canines are
,'sible. The canines are often exaggerated
tr'en drawing vampires and demons.
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The key is to leave a small space between the
contour for the molars and that for the front row
of teeth. This will also give the molars their
distinctive thickness.
Here the mouth is open t0 the extent possible in
a fullthrottle yell. The upper jaw, which is in
fact stable, appears as it it could move, causing
wrinkles t0 form at the sides of the nose, on the
cheeks, and under the eyes. Furrows develop on
the brow
Mouth with molars
given thickness
Here we see a mouth open in full
shout with the front teeth, the
canines, and the molars faithfully
rendered. The tongue has been
abstracted and diagonal strokes
used for the throat's dark interior,
resulting in a powerful image.