Gdc Impression Trays Edentulous perforated

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.

The are again divided into two types, based on the presence of perforations in it:

1) Perforated: There are small perforations or holes in the tray.

2) Non-Perforated: There are no perforations in the trays as they are used to carry impression materials which are not rigid Ex. Alginate.