Question

what is dental plaque? what is their role in tooth decay? ​

Answer 1

the new yellowish layer starts forming on the surface of teeth that usaalyy is not useful to health called dental plague...

dental plague decreases the ph of mouth which make acidic so that teeth starts deacy

Answer 2

Plaque is a soft, sticky film that builds up on your teeth and contains millions of bacteria. The bacteria in plaque cause tooth decay and gum disease if they are not removed regularly through brushing and flossing.

When you eat, the bacteria in plaque use the sugars in your food to produce acids that eat away at the tooth enamel. Repeated attacks cause the enamel to break down, eventually resulting in a cavity (or hole) in the tooth surface.

hope it's helpful :-)