Regular brushing not only removes food remnants but also dental plaque which is very damaging. Plaque is made up of bacteria and metabolic waste products. The bacteria multiply rapidly and as a sticky mass adhere to the teeth and aggressively
produce acid. This acid then attacks the enamel of the teeth causing decay. If the dental plaque is removed regularly the teeth will remain healthy.
Flossing is an excellent way of preventing decay as it gets deep in between the teeth where even the most proficient brusher can’t reach. And fluoride is also great as it makes the teeth resistant to acid attack and from bacteria.