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    You are at:Home»DENTAL CARE»Impression Trays and Their Uses

    Impression Trays and Their Uses

    DENTAL CARE Updated:January 26, 2021
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    Impression Trays and Their Uses
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    Impression trays are used in conjunction with various types of materials to take imprints of the patient’s dentition. The type of tray chosen depends on the type of impression needed and the procedure that is indicated.

    In this article show
    USES AND FEATURES OF IMPRESSION TRAYS
    5 TYPES OF IMPRESSION TRAYS
    Metal perforated type trays
    Features
    Plastic-type/stock tray
    Features
    The universal sectional impression tray
    Used and features
    Custom tray/special tray
    Features
    Triple tray
    Uses and features
    Impression Trays Set-up

    USES AND FEATURES OF IMPRESSION TRAYS

    • Used to hold impression material
    • Can be perforated for better retention
    • Have a handle for better grasp during placement and removal
    • Dentate impression trays – for patients with teeth
    • Edentulous impression trays – for patients with no teeth

    5 TYPES OF IMPRESSION TRAYS

    • Metal perforated type trays
    • Plastic-type/stock tray
    • The universal sectional impression tray
    • Custom tray/special tray
    • Triple tray.

    Metal perforated type trays

    Impression trays: Metal perforated type trays

    Features

    • Autoclavable
    • Available in different sizes (denoted by numbers)
    • Not easily adapted
    • Available as solid metal trays

    Plastic-type/stock tray

    Impression trays: Plastic type-stock tray

    Features

    • Disposable, single-use
    • A tray adhesive may be used for added retention of impression material
    • Available in different sizes (denoted by colours)
    • Can be adapted using a heat source

    The universal sectional impression tray

     

    The Universal sectional impression trays

    Used and features

    • The modified tray used to take an impression of a specific area of the mouth
    • Maybe perforated for retention
    • Fabricated from flexible metal – adaptable
    • Only suitable for dentate patients
    • Autoclavable
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    Custom tray/special tray

     

    Custom tray-special tray

    Features

    • Fabricated from a plaster model of the patient’s dentate or edentulous arches
    • Fabricated from an acrylic material
    • Disposable, single-use
    • Must be ‘painted’ with tray adhesive for retention of impression material

    Triple tray

    Impression trays: Triple tray

    Uses and features

    • Used to take an impression of both arches simultaneously
    • Fabricated from a combination of plastic and flexible webbing material
    • Many different sizes available (anterior, posterior, quadrant)
    • Disposable, single-use
    • Must be painted with tray adhesive for retention of impression material

    Impression Trays Set-up

    Set-up for taking an impression. Set-up will vary depending on the type of impression being taken.

    • Desired impression material
    • Desired type of impression tray, tray adhesive and applicator brush
    • If required, mixing spatula, mixing bowl and water measure
    • Kidney dish – in case of a gag reflex when taking impressions.
    • Tissues and rinse cup for patients
    • Wax may be required if the tray needs to be extended
    • Laboratory prescription form and laboratory bag
    • Red ribbon wax.
    • Equipment/materials for disinfection of impression prior to sending to the laboratory

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    Isreal Olabanji DST RN
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    Am Isreal olabanji a dental assistant and public health professionals and has years of experience in assisting the dentist with all sorts of dental issues. We regularly post timely and trustworthy medical information and news. My goal is to enlighten everyone in all aspects of health towards participating in fitness, Dental care, healthy recipes, child health, obstetrics, and more.

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