Deciduous teeth or primary teeth, also informally known as baby teeth, milk teeth, or temporary teeth, are the first set of teeth in the growth and development of humans and other diphyodonts, which include most mammals but not elephants, kangaroos, or manatees which are polyphyodonts.

A prosthesis for missing teeth. They're often made of acrylic, nylon, or metal. They can be used in place of one tooth, several, or all of your teeth, and they fit snugly over the gums.