In the eye's case, however, the film screen is your retina. Your retina is in the very back of the eye. It holds millions of cells that are sensitive to light. The retina takes the light the eye receives and changes it into nerve signals so the brain can understand what the eye is seeing. A Muscle Makes It Work
Dentures, also known as false teeth, are prosthetic devices constructed to replace missing teeth; they are supported by the surrounding soft and hard tissues of the oral cavity.
Teeth that are out of line are harder to clean and are more likely to get periodontal disease (gum disease) and cavities. If one or more of your teeth are missing, your dentist may suggest replacing your missing teeth with a bridge or a denture. If you need to have a tooth (or teeth) replaced, your dentist may do it, or he or she may refer you to a prosthodontist. A prosthodontist is a dentist who has completed a university post-graduate specialty program in prosthodontics.