Why do biofilms cause tooth decay?

Bacteria: Biofilms are collections of bacteria. If they are sitting on your teeth in the form of plaque, they are busy converting the sugar in your food to erosive acid.

Home for bacteria: Biofilms are a sticky coating that adheres to the teeth in which bacteria live and grow. The bacteria produce acids which are the primary cause of tooth decay.

Plaque: Biofilms usually refer to bacterial accumulation in water lines. Biofilms such as bacterial plaque on teeth will cause many problems. An accumulation of bad bacteria anywhere in your body is a bad thing. Strep mutans accumulating on your teeth allow them to secrete acids that degrade your tooth enamel and ultimately create decay.