Dental Impression tray Dentulous Perforated is used to take a negative imprint of hard (teeth) and soft tissues in the mouth from which a positive reproduction (cast or model) can be formed. Impression material is of liquid or semi-solid nature when first mixed and placed in the mouth.
It then sets to become an elastic solid (usually takes a few minutes depending upon the material), leaving an imprint of a person's dentition and
surrounding structures of the oral cavity.
Impression trays are used to hold the impression material, allowing the operator to place it into the patients' mouth.
They may be perforated for better retention of the impression material.