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By Andy Eckardt

MAINZ, Germany — Partygoers are being warned not to wear a brand of grotesque false teeth after a retailer discovered the product may be extremely hard to remove.

The Swiss-based Manor chain markets Rottin' Teeth as a "movie-quality" costume accessory, advertised with the slogan "stay put ... teeth will fit exactly in your mouth."

Rottin' Teeth.Manor

This catchphrase proved too true, however, and Manor was forced to issue a product recall after learning that users "might not be able to remove" them.

The teeth are aimed at costume-wearing revelers attending the annual Carnival season held in Europe's German-speaking countries. The festivities reach their peak in February.

Manor has sold more than 480 Rottin' Teeth in Switzerland, where they retail for around $10. The firm has "called at least 48 known customers to warn them immediately," spokeswoman Elle Steinbrecher told NBC News.

According to Swiss authorities, Manor informed officials in Basel that one person “was not able to remove the ... Rottin’ Teeth independently,” triggering the recall.

The product is also available in Germany, where product wholesaler Rubie's is based. No recall has been issued there yet.

"We have sold several thousand of these articles over the past years and never had a problem," a spokesman for Rubie’s said. "The product was tested under European Union norms."