Dirty Teeth
In this example I am going to teach you how to make a dirty teeth effect, the
effect will be applied on the beautiful teeth picture. Follow to make this
effect.
Step 1: Take a teeth a picture to modify as here.

Step 2: Make selection of the teeth by the polygonal lasso tool as looking
here.

Step 3: Take a new layer and select "#d78e03" color then fill in
the selection as here.

Step 4: Give pattern overlay effect, go to Layer menu > layer style >
Pattern Overlay and select pattern as here.

Step 5: Give color overlay effect, go to layer menu > layer style >
color overlay and make settings.

Step 6: Press Ctrl + T key and decrease size as given here.

Step 7: Now change blending mode of the layer.

Final Picture
