A denture is a removable dental appliance replacement for missing teeth and surrounding tissue. They are made to closely resemble your natural teeth and may even enhance your smile. A partial denture is used when some natural teeth remain. A denture is used when all the teeth either on the top or bottom are missing. There are two types of dentures, conventional and immediate. Conventional dentures are made after the teeth have been removed and the bone and soft tissues have healed. Immediate dentures are placed the same day the teeth are removed.