Dentures are removable prosthetic devices that replace missing teeth and surrounding tissues. There are two main types ofures: complete dentures, which replace all teeth in the upper or lower jaw, and partial dentures, which replace only a few missing teeth. Both types of dentures can be made from a variety of materials, including acrylic resin, porcelain, and metal. Your dentist can help you determine which type of denture is best for your needs.