Karius og Baktus

Karius and Baktus are to endearing troll-like bacteria living in a young boy's mouth. They lead a comfortable existence in their abodes in cavities that they have made in young Jens's teeth. However, when their activities start to cause their host pain, danger looms for the two charmingly sadistic fellows in the guise of a toothbrush and a dentist... (imdb user comment)