Dentures are a set of replacement teeth for any teeth that are missing. There are partial dentures, which take the place of only a few teeth and prevent the others from changing position. If all the teeth are missing, then complete dentures will be needed, which replace every tooth in the mouth.
Both types of dentures are removable and usually made of metal and acrylic resin, a plastic-like material that is moulded to fit the exact shape of a person's mouth. Suction helps hold the dentures in place, so they stick to the surface of a person's gums.