Okay, how to remove a yellow teeth? Just simply use your lasso tool with a little bit of a feather, let’s just say 5 pixels feather. Just make a selection around the teeth area. Next we’re going to image adjust and going to selective color; under the colors, choose yellow in yellow channel, just remove the yellow to teeth.
There you have it. Now if we go back in history, before, after. And you can go in now and brighten it up and make any other adjustment.