Biofilm is a naturally occurring phenomenon in the human mouth. It is a sticky, colorless deposit that constantly forms on our teeth and contains bacteria. The formation of biofilm begins when free-floating bacteria in the mouth adhere to the surface of the teeth. Over time, these bacteria multiply and create a layer known as a biofilm. The process is a part of the body's natural ecosystem. However, when not properly managed, biofilm can lead to dental issues such as tooth decay and gum disease.