Dental plaque is a biofilm composed of bacteria, saliva, and food particles that accumulate on the tooth surface and along the gumline. It begins forming shortly after eating or drinking and, if not removed, can harden into tartar and lead to gum disease and tooth decay. Brushing twice daily and flossing daily are crucial for removing plaque and preventing its buildup. Plaque bacteria produce acids that attack tooth enamel, leading to demineralization and the formation of cavities. Regular dental cleanings by a hygienist can help remove stubborn plaque and tartar deposits that cannot be eliminated by brushing alone.