all credit to Dr Ice (remixer)

http://www.thingiverse.com/Dr_Ice/about

shared under the Creative commons licence

<div xmlns:cc="http://creativecommons.org/ns#" xmlns:dct="http://purl.org/dc/terms/" about="http://www.thingiverse.com/thing:174449"><span property="dct:title">Realistic Pumpkin Teeth</span> (<a rel="cc:attributionURL" property="cc:attributionName" href="http://www.thingiverse.com/Dr_Ice">Dr_Ice</a>) / <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/">CC BY-NC-SA 3.0</a></div>

and Todd Blatt (original)

http://www.thingiverse.com/thing:26776

<div xmlns:cc="http://creativecommons.org/ns#" xmlns:dct="http://purl.org/dc/terms/" about="http://www.thingiverse.com/thing:26776"><span property="dct:title">Chattering Teeth - manual version</span> (<a rel="cc:attributionURL" property="cc:attributionName" href="http://www.thingiverse.com/MakerBot">MakerBot</a>) / <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/">CC BY-SA 3.0</a></div>