A dental filling is a restorative treatment used to repair teeth affected by cavities, cracks, or minor damage. It helps restore the tooth’s shape, strength, and function while preventing further decay. Fillings can be made from materials like composite resin, amalgam, gold, ceramic, or glass ionomer, depending on durability and aesthetic preferences. This procedure not only preserves the natural tooth but also enhances oral health by sealing damaged areas and preventing bacterial infection.