A removable dental appliance, made of wire and plastic, worn in the palate and used as a diagnostic or therapeutic aid in orthodontics or prosthodontics. Also called bite plane.

orthodontic appliance to maintain teeth in correct positions and to stabilize the result of the treatment and retainers are often used before or after braces in order to hold teeth in a certain position while allowing surrounding gums and bone to adjust.

A retention clasp designed by C. Philip Adams to stabilize removable appliances by engaging the mesiobuccal and distobuccal surfaces of buccal teeth.