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Ch 46 recall

TermDefinition
Is an impression a negative or a positive reproduction? negative
Of the three classifications of impressions, which can the EFDA legally take? preliminary, final and occlusal (bite registration)
Which of the three classifications of impressions is used for occlusal relationships? occlusal
Which type of impression tray covers half the arch? quadrant trays
Which type of tray allows impression material to lock on mechanically? perforated surface trays
Which type of tray is designed to fit a specific patient? custom tray
What is used to extend the length of a tray? adding utility wax to the border of the tray
What is the most widely used irreversible hydrocolloid for preliminary impressions? alginate
What is the organic substance within hydrocolloid materials? Seaweed
Why would you select a fast-set alginate over a normal-set alginate? if the patient has a strong gag reflex
What is the water-to-powder ratio for taking a maxillary impression? 3 scoops to 3 water
What does the prefix “hydro-” mean? water
Do you mix irreversible hydrocolloid on a paper pad or in a mixing bowl? mixing bowl
Before an impression is taken with reversible hydrocolloid, where is the material kept? conditioning bath
Is an elastomeric material used for preliminary impressions or final impressions? final
In which three ways are elastomeric materials supplied? light bodied, regular, and heavy bodied
What technique is used to place light-bodied material around a prepared tooth? Extruder with tip/ COE syringe
What impression material will the dentist first apply to a prepared tooth—the heavy-bodied or the light-bodied form? light-bodied
What system completes the mixing of a final impression material for you? automix
What is another term for polysulfide? rubber base
Which type of bite registration material is most popular? polysiloxane.
What type of tray is used when ZOE bite registration paste is applied? gauze tray
Do you cool or warm the wax before placing the tray in the patient’s mouth for a bite registration? warm
Created by: ARIGON5248
 

 



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