Complete dentures are removable dental appliances designed to replace all missing teeth in either the upper or lower jaw, or both. They are custom-made to fit the shape of a person's mouth and provide support for facial structures, improving appearance and function. These dentures are typically made from acrylic resin and may include a metal framework for added strength. Complete dentures help individuals regain the ability to chew food and speak clearly, enhancing their quality of life. Regular check-ups with a dentist are important to ensure proper fit and function over time.