Dentures are removable dental appliances designed to replace missing teeth and restore the appearance and function of a person's smile. They can be either complete or partial; complete dentures are used when all teeth are missing in an arch, while partial dentures fill gaps left by one or more missing teeth. Made from materials like acrylic resin and sometimes reinforced with metal, dentures are custom-made to fit the unique shape of an individual's mouth, ensuring comfort and stability. They help improve chewing ability, speech, and facial aesthetics, allowing individuals to regain confidence in their smile and overall oral health.