Question 1

Alginate impressions must be poured within _____ so that distortion does not occur.

Accepted Answer

A) 5 minutes 
B) 30 minutes 
C) 1 hour 
D) 24 hours 
A) 5 minutes 
B) 30 minutes 
C) 1 hour 
D) 24 hours

Question 2

Which of the following is not considered a classification of impression materials?

Accepted Answer

A) Preliminary 
B) Final 
C) Temporary 
D) Occlusal 
A) Preliminary 
B) Final 
C) Temporary 
D) Occlusal

Question 3

What are preliminary impressions used to make?

Accepted Answer

A) Diagnostic models 
B) Provisional coverage 
C) Orthodontic appliances 
D) All of the above 
A) Diagnostic models 
B) Provisional coverage 
C) Orthodontic appliances 
D) All of the above

Question 4

How is an alginate impression disinfected?

Accepted Answer

A) Spray the alginate with glutaraldehyde. 
B) Submerse it in disinfecting solution overnight. 
C) Wet it with isopropyl alcohol. 
D) Spray the alginate with an intermediate-level disinfectant. 
A) Spray the alginate with glutaraldehyde. 
B) Submerse it in disinfecting solution overnight. 
C) Wet it with isopropyl alcohol. 
D) Spray the alginate with an intermediate-level disinfectant.

Question 5

What position should the EFDA use while taking mandibular and maxillary impressions?

Accepted Answer

A) Upright 
B) Operator 
C) Supine 
D) Assisting 
A) Upright 
B) Operator 
C) Supine 
D) Assisting

Question 6

Which material is one of the most popular impression materials used for bite registration?

Accepted Answer

A) Polysulfide 
B) Zinc oxide-eugenol 
C) Polysiloxane 
D) Reversible hydrocolloid 
A) Polysulfide 
B) Zinc oxide-eugenol 
C) Polysiloxane 
D) Reversible hydrocolloid

Question 7

What type of impression tray is required with reversible hydrocolloid impressions?

Accepted Answer

A) Perforated 
B) Disposable 
C) Water-cooled 
D) Plastic 
A) Perforated 
B) Disposable 
C) Water-cooled 
D) Plastic

Question 8

Which of the following is not correct regarding reversible hydrocolloids?

Accepted Answer

A) Plastic stops are used during the impression. 
B) The impression procedure requires the use of three conditioning baths for the material. 
C) The material is 85% agar and 15% water. 
D) Either tray or syringe material can be used for the impression. 
A) Plastic stops are used during the impression. 
B) The impression procedure requires the use of three conditioning baths for the material. 
C) The material is 85% agar and 15% water. 
D) Either tray or syringe material can be used for the impression.

Question 9

Which type of impression tray covers only half of a dental arch?

Accepted Answer

A) Full-arch 
B) Section 
C) Quadrant 
D) Custom 
A) Full-arch 
B) Section 
C) Quadrant 
D) Custom

Exam 46: Impression Materials

Alginate impressions must be poured within _____ so that distortion does not occur.

Which of the following is not considered a classification of impression materials?

What are preliminary impressions used to make?

How is an alginate impression disinfected?

What position should the EFDA use while taking mandibular and maxillary impressions?

Which material is one of the most popular impression materials used for bite registration?

What type of impression tray is required with reversible hydrocolloid impressions?

Which of the following is not correct regarding reversible hydrocolloids?

Which type of impression tray covers only half of a dental arch?

History of Dentistry

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