How
to Whiten Teeth
To whiten teeth using Photoshop 7, use the Lasso tool to draw a
loose selection around the teeth. (Instructions for Photoshop Elements
are at the bottom of the page.)

On the menu, select Image | Adjustments | Hue/Saturation.
The Hue/Saturation dialog box will open. We only want to
edit the yellow color, so in the Edit drop-down list, change
Master to Yellows. Decrease the Saturation
to remove the yellows and increase the Lightness if needed.
Click OK and deselect the teeth.

The result? White as white can be!

Photoshop Elements: Use the lasso
tool to draw a loose selection around the teeth. On the menu, select
Enhance | Adjust Color | Hue/Saturation. In the Edit
drop-down list, change Master to Yellows. Decrease
the Saturation to remove the yellows and increase the Lightness
if needed. Click OK and deselect the teeth.
Connie learned this trick from The Photoshop Book
for Digital Photographers by Scott Kelby available at Amazon.
Posted August 16, 2005