A denture is an appliance that is inserted in the mouth, replaces natural teeth and provides support for the cheeks and lips.
An upper denture has acrylic, usually flesh colored, that covers the palate (roof of the mouth). A lower denture is shaped like a horseshoe to leave room for the tongue.
The teeth are made of plastic, porcelain or a combination of both. Dentures can be fabricated to fit over dental implants to allow for a more secure fit of the appliance.
Most dentures are made of acrylic, in two different ways:
Dentures over a normal course of time will wear and need to be replaced or relined in order to keep the jaw alignment normal. The alignment will slowly change as the bone and gum ridges recede or shrink due to the extraction of the teeth. Regular dental examinations are still important for the denture wearer so that the oral tissues can be checked for disease or change.