I do not have pictures of every step so forgive me if some things are a little confusing or left out.
Things you will need:
x2 cheap halloween teeth [I got mine from wal-mart for 3 dollars each] 1 for top teeth 1 for bottom teeth
x1 soda bottle [was just laying around my desk]
x1 set of regular acrylic finger nails [wal-mart 3 dollars]
x1 tube of Loctite Repair putty [doesnt have to be loctite brand it was just what they had at wal-mart and worked perfectly]
x1 hot glue gun and glue sticks
Acrylic paints I used Pink, Browns, Black, Grey, Red, yellow, etc
An handheld dremel helps but sand paper will work just fine
And a lot of patience...
And here is a link of the final product in action
Step 1: Creating the Base for Your Teeth and Outer Gums
get it to a rough surface but dont grind into the "gums" too much just make it rough for a good grip for the putty to stick to then I followed the instructions on the pack and molded them to both the top and bottom sets of my teeth
I bought some loctite repair putty the kind that you mix up and it sets in about 5 minutes and made too little worms of putty and stuck the worms to the sanded area where the teeth on the dentures used to be. this is to create a strong area to hold the peice that will go over your lips and to create a space for your lips to rest behind the outer gums
then cut off the top of your soda bottle and throw away the bottom peice all you will need is the top part that curves around.
its a little hard to explain but you need to cut the bottle into a shape that you want to go over your lips and make sure its a natural shape to the curves of your mouth like in the picture
once you have those shapes cut out I put about 3 or 4 little holes on the inner edges of the plastic peices and then made matching holes in the now dry repair putty on the dentures this is to help keep them secure when you glue them on.
I used hot glue because I was able to glue the plastic peices on while wearing the dentures to ensure a comfortable fit around my mouth area.
WARNING: DO NOT PUT YOUR GLUE GUN TOO CLOSE TO THE PLASTIC IT RAPIDLY HEAT UP AND WARP YOUR PLASTIC AND YOU WILL HAVE TO MAKE NEW ONES.
Put glue on the putty first BE CAREFUL if your doing this with them in your mouth dont be dumb and burn your lips
quickly stick the plastic peice on the repair putty where you want it and match the holes up try and make sure some of the glue gets in the holes on the plastic to ensure a secure hold.
once all this is finished and done properly you should have something like the picture
Step 2: Adding the Teeth
try and rough them up a bit with your dremel or sandpaper to help them take acrylic paints I even went as far as to carefully slice some pretty deep lines in them with an xacto knife.
Carefully glue the teeth in place where you want them I put mine flush with the plastic underneath so when you bite down your not accidentally breaking the teeth off or something you dont want them to be actually touching too much when you bite down.
after they were all glued down I added some depth with hot glue to create a sort of receding gum area.
ONCE AGAIN DO NOT PUT THE GLUE GUN TOO CLOSE TO YOUR PLASTIC IT WILL WARP AND CRAP ALL OVER YOUR PROGRESS
Now the fun part!
Step 3: Painting
I started with a coat of pink just to get the idea of the gum area
Then I added various watered down layers of yellow, brown, red and black.
then went in with a small brush and added details and grime in the cracks of the teeth
And I painted anything else just a super dark brown color you dont want anything standing out besides the teeth really since thats the point of the gag really...
after the paintjob was done i added a small layer of super glue in certain areas to add some shine to it as leftover saliva leaking out of the teeth or something....
And wala extra cheap out of mouth zombie dentures.
The rest of the make-up is up to you!
you can make a latex appliance to put over it or even just do the old tissue paper and latex method to create some on the fly chewed off lips etc