more tutorials:

vampire makeover
light explosion text.
Ice text.
Glass text effect.
Bloody text.
Create realistic vampire fangs.
Create a Smoky Eye make up.
Changing Eye color and eye retouching.
change hair color.
Making dark and cold photo effect.
Creating ghost photo.
Drawing fake blood.
Create forum signature in photoshop.

Create realistic vampire fangs.

Step 1

Open your picture, I used this one:
start image

Choose any selection tool like the Polygonal Lasso Toollasso tool, and make a selection of the fang.
fang selection

Right click on the photo and choose Layer via copy, you'll get a new layer with only the fang in it.

Step 2

Go to Edit > Transform > Warp.
warp 1

Strech the fang down to create a vampire tooth.
warp 2

Return to the background layer, and do the same for the other tooth.
final image