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Ch 46 Impression Materials - EFDA Questions and Answers Fully Solved
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Ch 46 Impression Materials - EFDA
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Ch 46 Impression Materials - EFDAIs an impression a negative or a positive reproduction? - answer negative
Of the three classifications of impressions, which can the EFDA legally take? - answer
The EFDA can legally take preliminary impressions and bite registrations.
Which of the three classifications of impressions is used for occlusal relationships? -
answer The bite registration is used for occlusal relationships.
Which type of impression tray covers half the arch? - answer A quadrant tray
Which type of tray allows impression material to lock on mechanically? - answer A
perforated tray
Which type of tray is designed to fit a specific patient? - answer A custom tray
What is used to extend the length of a tray? - answer Utility wax
What is the most widely used irreversible hydrocolloid for preliminary impressions? -
answer alginate
What is the organic substance within hydrocolloid materials? - answer alginate, which is
derived from seaweed
Why would you select a fast-set alginate over a normal-set alginate? - answer if the
patient had a strong gag reflex
What is the water-to-powder ratio for taking a maxillary impression? - answer three
scoops of powder to three
measures of water.
What does the prefix "hydro-" mean? - answer Hydro- means water
Do you mix irreversible hydrocolloid on a paper pad or in a mixing bowl? - answera
rubber mixing bowl.
Before an impression is taken with reversible hydrocolloid, where is the material kept? -
answermaterial is kept in a conditioning bath.
is an elastomeric material used for preliminary impressions or final impressions? -
answerfinal impressions.
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