I used to whiten teeth when retouching photos by using the Dodge tool. It was fast but the results could look fake.
I found a much better way to whiten teeth and the teeth look great and natural.
My trick? Just remove the yellow.
In my example I selected just the teeth. Then, under Hue and Saturation I took the yellow almost completely out of the photo.Here are my results below. No more fake looking smiles for me!