The impression trays serve as a carrier for the material used in creating the mold of teeth and adjacent structures. There are several types depending on the size and shape of the jaw of the patient.
Horseshoe shaped device made of metal or plastic used to carry dental impression material to the mouth, to confine the material in opposition to the surfaces to be recorded (e.g., teeth and gums), and to control the impression material while it sets to form an impression.
The Impression Trays are of 2 main types:
1) Dentulous: These are trays which are used to take impressions of people with teeth or of a dentulous mouth.
2) Edentulous: These are trays which are used to take impressions in an edentulous mouth or a patient without teeth.