Hi, since this technique isn't my own, I can only provide a link to the instructions. I was an editor for this online ezine, so I'm sure I can share the info here.

http://www.geocities.com/customdollarchive/Fall2000/mouths.html

You will love the look on some without the teeth. I have so much fun doing this. Dolls that have very thin lips, don't look as good. Like the Superstar Barbie or 90s Ken (see below). They have thin upper lips and look tight-lipped.

On the left is what one looks like before repainting. She's an Asha face Christie/Barbie.

The best ones to use are Asha, Teresa, Brandy, 80s Christie, 70s Jazzy, Teen Skipper, Steven. Other possibilities are Ana/Lara (new Teresa), Gen. Girl Tori/Chelsea and the last open mouth Barbie.

Below are some of my girls and guys who had tooth extractions.