Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 46 imp
impressions
| Question | Answer |
|---|---|
| An impression is a ______ reproduction of teeth and surrounding oral tissues | negative |
| The model created from an impression is a _______ reproduction of the structures | positive |
| Final impressions are taken by the | dentist |
| 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 |
| The irreversible hydrocolloid material used most widely for preliminary impressions is | alginate |
| most alginate impressions must be poured within ______ so that distortion does not occur | 1 hour |
| 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 |
| A ____ tray covers half of a dental arch | quadrant |
| The length or depth of the alginate impression tray borders can be extended by adding ____ to the tray | utility wax |
| Elastomeric impression materials are mixed by using ____ | a paper pad and spatula or an automix system |
| What type of tray allows the material to lock on mechanically | perforated |
| What is the organic substance of hydrocolloid material | seaweed |
| what type of wax is most commonly used for bite registration | baseplate wax |
| T/F : hydro means air | F |
| T/F : a dental assistant is allowed to take a preliminary impression | T |
| 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 |
| T/F Another term for polysulfide is rubber base | T |
| Y/N : is agar derived from seaweed | Y |
| Y/N : does extrude mean to push or force out | Y |
| Y/N : You would use fast set alginate for a gagger | Y |
| What does imbibition mean | absorption of water causing object to swell |
| name the 3 classifications of impressions | preliminary, final and bite registration |
| Name at lest two types of elastomreic materials | Polysulfide, polyether, silicone and polisiloxane |
| What is the purpose of a wax bite registration | to show the occlusal relationship of the teeth |
| Is an impression , a negative or positive reproduction | negative |
| what is the water to powder ratio for taking a maxillary alginate impression | 3:3 |
| In what three ways are elastomeric materials supplied | pastes, cartridges and putty |
| how is light bodied impression material placed around the tooth | with a syringe |
| what is a better way to say "packing the cord" | placing the string |
Created by:
cynthia.fryer
Popular Dentistry sets