Dental fillings restore teeth affected by cavities and decay by sealing out bacteria and preventing further damage. After removing the decayed portion, a filling—often made of tooth-colored composite resin—is placed to rebuild the tooth’s structure and function. This helps maintain proper bite alignment, preserves chewing ability, and reduces the need for more invasive treatments like root canals or extractions. By reinforcing the tooth and stopping decay from spreading, fillings play a crucial role in long-term oral health and a confident smile.