I wish I'd run across this New York Times article earlier. Hopefully its warning will arrive in time, before the damage is done:

• The Consumer Product Safety Commission announced a late recall on Wednesday, warning shoppers that fake Halloween teeth sold by the tens of thousands over the last year contained excessive amounts of lead.

  The $2 packages, marketed as Ugly Teeth, were the latest in a long line of Chinese-made toys and novelty items recalled because of lead content. The commission announced the recall on Halloween, in a late-morning press release.

  The agency said that since January 2006, retailers had sold about 43,000 eight-piece packages of the party favors. There were no immediate reports of illness.