The human mouth is a diverse environment filled with an ever-changing mix of bacteria. Some of those bacteria is helpful, while other forms have the potential to create harm.
Plaque is a sticky film made of a combination of saliva and bacteria. Left in place, plaque begins to infiltrate the layers of your teeth, creating decay. Your gums also suffer from plaque and bacteria and can become so inflamed they begin to pull away from the surface of your teeth.
Advanced tooth decay and gum disease allow bacteria from your mouth to enter your bloodstream. Extensive research shows links between poor oral hygiene and a wide range of health conditions, including heart disease.