Tooth worm

The idea of a tooth worm is a theory of the cause of dental caries, periodontitis and toothaches.

It was supposed that the disease was caused by small worms resident within the tooth, eating it away.

The belief persisted into the 18th century, only being disproven by the microscopical endeavors of M. Pierre Fauchard.

Most however admitted to have never encountered a worm in vivo, but nonetheless encouraged the belief among the general public.

[citation needed] A 2009 study by the University of Maryland Baltimore using micro imaging revealed worm-like structures within a dissected molar.