impressions
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| An impression is a ______ reproduction of teeth and surrounding oral tissues | negative
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| The model created from an impression is a _______ reproduction of the structures | positive
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| Final impressions are taken by the | dentist
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| An impression tray should be sufficiently deep to allow ___ mm of material between the tray and the incisal/occlusal edges of the teeth | 2 - 3 mm
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| The irreversible hydrocolloid material used most widely for preliminary impressions is | alginate
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| most alginate impressions must be poured within ______ so that distortion does not occur | 1 hour
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| if an alginate impression is stored in water or in a soaked paper towel, the alginate will absorb the additional water and expand. This property is called_______ | imbibition
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| A ____ tray covers half of a dental arch | quadrant
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| The length or depth of the alginate impression tray borders can be extended by adding ____ to the tray | utility wax
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| Elastomeric impression materials are mixed by using ____ | a paper pad and spatula or an automix system
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| What type of tray allows the material to lock on mechanically | perforated
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| What is the organic substance of hydrocolloid material | seaweed
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| what type of wax is most commonly used for bite registration | baseplate wax
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| T/F : hydro means air | F
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| T/F : a dental assistant is allowed to take a preliminary impression | T
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| T/F : during the prep the dentist applies the light bodied material to the tooth, while the assistant would dispense heavy body in the tray | T
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| T/F Another term for polysulfide is rubber base | T
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| Y/N : is agar derived from seaweed | Y
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| Y/N : does extrude mean to push or force out | Y
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| Y/N : You would use fast set alginate for a gagger | Y
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| What does imbibition mean | absorption of water causing object to swell
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| name the 3 classifications of impressions | preliminary, final and bite registration
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| Name at lest two types of elastomreic materials | Polysulfide, polyether, silicone and polisiloxane
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| What is the purpose of a wax bite registration | to show the occlusal relationship of the teeth
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| Is an impression , a negative or positive reproduction | negative
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| what is the water to powder ratio for taking a maxillary alginate impression | 3:3
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| In what three ways are elastomeric materials supplied | pastes, cartridges and putty
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| how is light bodied impression material placed around the tooth | with a syringe
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| what is a better way to say "packing the cord" | placing the string
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Created by:
cynthia.fryer
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