In this tutorial, Iād like to share the simplest way to whiten teeth in the picture. Only you should do is paint on teeth with dodge tool. Although it is pretty simple, the range of application is limited, in the case of the teeth is too dark and has different color.
The following is the contrast picture.
Firstly, wheel to enlarge the part of teeth.
Select Dodge Tool, and paint on it. The parameter of Exposure and Hardness are 70, and the Range is Shadows. Is the left teeth white than the right?
Slowly and carefully to paint the teeth, the effect comes out.