A full upper denture
These are dentures that are placed on a jaw that has no natural teeth remaining. They are usually made from plastic (acrylic). They therefore rest directly on the gum that overlies the bone in the mouth.
Upper dentures are usually much more stable than lower dentures. This is because of the suction that can be gained from covering the roof of the mouth. This suction is not possible in the lower jaw due to the position of the tongue.