Dental Plaque is a mass of bacteria that grows on surfaces of the teeth. When you brush and floss your teeth, you remove any accumulation of Dental Plaque that has formed. If you don’t remove it on a daily basis, Plaque turns into Calculus (Tartar) which can’t be removed by brushing or flossing. Dental plaque is also known as oral biofilm. Dental Plaque is one of the major causes for dental decay and gum disease such as Gingivitis.