IMPRESSION IMPRESSION A negative likeness or copy in

IMPRESSION �A negative likeness or copy in reverse of the surface of an object;

IMPRESSION TRAY �A device that is used to carry, confine, and control impression material

STOCK TRAY � A metal prefabricated impression tray typically available in various sizes and

PRELIMINARY IMPRESSION �A negative likeness made for the purpose of diagnosis, treatment planning, and/or

PRIMARY CAST �A cast formed from a primary impression for use in diagnosis and

CUSTOM TRAY �An individualized impression tray made from a cast recovered from a preliminary

FINAL IMPRESSION � The impression that represents the completion of the registration of the

DEFINITIVE CAST � A replica of the tooth surfaces, residual ridge areas and/or other

PRIMARY IMPRESSION SECONDARY IMPRESSION ØTrays used: - ØTray used Ø Materials used: • Impression

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IMPRESSION

IMPRESSION �A negative likeness or copy in reverse of the surface of an object; an imprint of the teeth and adjacent structures for use in dentistry. (GPT 9)

IMPRESSION TRAY �A device that is used to carry, confine, and control impression material while making an impression. 1. Stock tray 2. Custom tray

STOCK TRAY � A metal prefabricated impression tray typically available in various sizes and used principally for preliminary impressions. GPT-9

PRELIMINARY IMPRESSION �A negative likeness made for the purpose of diagnosis, treatment planning, and/or the fabrication of a custom impression tray. GPT-9

PRIMARY CAST �A cast formed from a primary impression for use in diagnosis and / or the fabrication of an impression tray. (GPT-9)

CUSTOM TRAY �An individualized impression tray made from a cast recovered from a preliminary impression, it is used in making a final impression. GPT-9

FINAL IMPRESSION � The impression that represents the completion of the registration of the surface or object. (GPT-9

DEFINITIVE CAST � A replica of the tooth surfaces, residual ridge areas and/or other parts of the dental arch and/or facial structures used to fabricate a dental restoration or prosthesis called also a final cast. GPT-9

PRIMARY IMPRESSION SECONDARY IMPRESSION ØTrays used: - ØTray used Ø Materials used: • Impression compound(non perforated trays) • Alginate(perforated trays )for retention of alginate and mechanical interlocking. ØSecondary impression materials: - ØUses: - • Stock trays • Dentulous and edentulous trays • Disposable and non disposable • Perforated and non perforated trays • Rimlock trays For diagnosis and fabrication of special tray Custom made trays/special trays/individualized trays: They are made for one particular individual. Green stick compound for border moulding. • Zinc oxide eugenol impression paste • Alginate • Elastomer (putty like consistency) • Impression plaster For obtaining master cast(the processing of the denture is done in this cast)