Question 1

Alginate hydrocolloid is recommended:

Accepted Answer

A)  for preparation of study models. 
B)  for impressions of cavity preparations. 
C)  in the preparation of athletic mouth protectors. 
D)  for A, B, and C. 
E)  for A and C. 
A)  for preparation of study models. 
B)  for impressions of cavity preparations. 
C)  in the preparation of athletic mouth protectors. 
D)  for A, B, and C. 
E)  for A and C. E

Question 2

Alginate impressions prepared from extended storage products usually can be stored under proper conditions for up to _____ without serious dimensional changes.

Accepted Answer

A)  10 minutes 
B)  1 hour 
C)  1 day 
D)  5 days 
E)  2 weeks 
A)  10 minutes 
B)  1 hour 
C)  1 day 
D)  5 days 
E)  2 weeks D

Question 3

Addition silicone putties:

Accepted Answer

A)  should not be mixed with bare hands. 
B)  may be mixed with bare hands. 
C)  should not be mixed when latex rubber gloves are worn. 
D)  A and C. 
E)  B and C. 
A)  should not be mixed with bare hands. 
B)  may be mixed with bare hands. 
C)  should not be mixed when latex rubber gloves are worn. 
D)  A and C. 
E)  B and C. E

Question 4

A maxillary impression tray should:

Accepted Answer

A)  leave a 2 mm border around the alveolar process. 
B)  cover the distal of the most posterior tooth. 
C)  include the maxillary tuberosity. 
D)  extend past the mucobuccal fold. 
A)  leave a 2 mm border around the alveolar process. 
B)  cover the distal of the most posterior tooth. 
C)  include the maxillary tuberosity. 
D)  extend past the mucobuccal fold.

Question 5

Which of the following is a rigid dental impression material?

Accepted Answer

A)  Addition silicone 
B)  Zinc oxide-eugenol 
C)  Polyether 
D)  Polysulfide 
A)  Addition silicone 
B)  Zinc oxide-eugenol 
C)  Polyether 
D)  Polysulfide

Question 6

Early elastomeric impression materials included:

Accepted Answer

A)  polyether. 
B)  condensation silicone. 
C)  polysulfide. 
D)  all of the above. 
E)  only A and C. 
A)  polyether. 
B)  condensation silicone. 
C)  polysulfide. 
D)  all of the above. 
E)  only A and C.

Question 7

If an alginate impression is left to sit in a dry environment,the material will shrink.This process is known as:

Accepted Answer

A)  imbibition. 
B)  syneresis. 
C)  dimensional change. 
D)  hysteresis. 
A)  imbibition. 
B)  syneresis. 
C)  dimensional change. 
D)  hysteresis.

Question 8

With time,alginate gels shrink and lose water through a process called:

Accepted Answer

A)  imbibition. 
B)  syneresis. 
C)  agglomeration. 
D)  agglutination. 
E)  dehydration. 
A)  imbibition. 
B)  syneresis. 
C)  agglomeration. 
D)  agglutination. 
E)  dehydration.

Question 9

Bubbles are produced in gypsum dies if poured in:

Accepted Answer

A)  less than 1 hour. 
B)  1 hour. 
C)  more than 1 hour. 
D)  none of the above; bubbles are not an issue. 
A)  less than 1 hour. 
B)  1 hour. 
C)  more than 1 hour. 
D)  none of the above; bubbles are not an issue.

Question 10

Advantages of elastomeric impression materials in contrast to alginate hydrocolloid materials include:

Accepted Answer

A)  greater accuracy. 
B)  dimensional stability with time. 
C)  ability to record detail. 
D)  both A and C. 
A)  greater accuracy. 
B)  dimensional stability with time. 
C)  ability to record detail. 
D)  both A and C.

Question 11

Dimensional change of addition silicone after 24 hours is:

Accepted Answer

A)  -0.1%. 
B)  -1%. 
C)  0.1%. 
D)  1%. 
A)  -0.1%. 
B)  -1%. 
C)  0.1%. 
D)  1%.

Question 12

An advantage of using an elastomeric impression material over an irreversible hydrocolloid is it:

Accepted Answer

A)  is less expensive. 
B)  is the best material for study models. 
C)  has greater dimensional accuracy. 
D)  is a reversible process. 
A)  is less expensive. 
B)  is the best material for study models. 
C)  has greater dimensional accuracy. 
D)  is a reversible process.

Question 13

Alginate should be mixed by adding powder to water.Alginate should be mixed with a narrow,pliable spatula.

Accepted Answer

A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect. 
A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect.

Question 14

The mixing time of fast-setting alginate is:

Accepted Answer

A)  less than 15 seconds. 
B)  30 to 45 seconds. 
C)  1.25 minutes. 
D)  2 minutes. 
A)  less than 15 seconds. 
B)  30 to 45 seconds. 
C)  1.25 minutes. 
D)  2 minutes.

Question 15

Recommendations for mixing the alginate include:

Accepted Answer

A)  using ice water. 
B)  adding the powder to the water. 
C)  adding the water to the powder. 
D)  both A and B. 
E)  both A and C. 
A)  using ice water. 
B)  adding the powder to the water. 
C)  adding the water to the powder. 
D)  both A and B. 
E)  both A and C.

Question 16

Of the following,which will alter setting times for alginate?

Accepted Answer

A)  Increased water temperature 
B)  Decreased water temperature 
C)  Decreased powder 
D)  A, B, and C 
E)  Only A and B 
A)  Increased water temperature 
B)  Decreased water temperature 
C)  Decreased powder 
D)  A, B, and C 
E)  Only A and B

Question 17

Which type of impression material is the most popular for restorative procedures?

Accepted Answer

A)  Addition silicone 
B)  Polyether 
C)  Polysulfide 
D)  Hydrocolloid 
A)  Addition silicone 
B)  Polyether 
C)  Polysulfide 
D)  Hydrocolloid

Question 18

Alginate impression material may be referred to as a(n):

Accepted Answer

A)  addition silicone. 
B)  condensation silicone. 
C)  polyether. 
D)  irreversible hydrocolloid. 
E)  reversible hydrocolloid. 
A)  addition silicone. 
B)  condensation silicone. 
C)  polyether. 
D)  irreversible hydrocolloid. 
E)  reversible hydrocolloid.

Question 19

An advantage of using premeasured packets of alginate material includes packets are:

Accepted Answer

A)  impervious to moisture. 
B)  less expensive than cans. 
C)  premeasured for a full arch. 
D)  all of the above. 
E)  only A and C. 
A)  impervious to moisture. 
B)  less expensive than cans. 
C)  premeasured for a full arch. 
D)  all of the above. 
E)  only A and C.

Question 20

The dimensional change of polyethers is higher than that of the addition silicones.The polyether absorbs water and changes dimensions if stored in contact with water until equilibrium is reached.

Accepted Answer

A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect. 
A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect.

Alginate hydrocolloid is recommended:

Alginate impressions prepared from extended storage products usually can be stored under proper conditions for up to _____ without serious dimensional changes.

Addition silicone putties:

A maxillary impression tray should:

Which of the following is a rigid dental impression material?

Early elastomeric impression materials included:

If an alginate impression is left to sit in a dry environment,the material will shrink.This process is known as:

With time,alginate gels shrink and lose water through a process called:

Bubbles are produced in gypsum dies if poured in:

Advantages of elastomeric impression materials in contrast to alginate hydrocolloid materials include:

Dimensional change of addition silicone after 24 hours is:

An advantage of using an elastomeric impression material over an irreversible hydrocolloid is it:

Alginate should be mixed by adding powder to water.Alginate should be mixed with a narrow,pliable spatula.

The mixing time of fast-setting alginate is:

Recommendations for mixing the alginate include:

Of the following,which will alter setting times for alginate?

Which type of impression material is the most popular for restorative procedures?

Alginate impression material may be referred to as a(n):

An advantage of using premeasured packets of alginate material includes packets are:

The dimensional change of polyethers is higher than that of the addition silicones.The polyether absorbs water and changes dimensions if stored in contact with water until equilibrium is reached.

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Direct Esthetic Restorative Materials

Dental Amalgam

Finishing, polishing, and Cleansing Materials

Cements

Model and Die Materials

Waxes

Casting Alloys, wrought Alloys, and Solders

Casting and Soldering

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

Exam 8: Impression Materials

Alginate hydrocolloid is recommended:

Alginate impressions prepared from extended storage products usually can be stored under proper conditions for up to _____ without serious dimensional changes.

Addition silicone putties:

A maxillary impression tray should:

Which of the following is a rigid dental impression material?

Early elastomeric impression materials included:

If an alginate impression is left to sit in a dry environment,the material will shrink.This process is known as:

With time,alginate gels shrink and lose water through a process called:

Bubbles are produced in gypsum dies if poured in:

Advantages of elastomeric impression materials in contrast to alginate hydrocolloid materials include:

Dimensional change of addition silicone after 24 hours is:

An advantage of using an elastomeric impression material over an irreversible hydrocolloid is it:

Alginate should be mixed by adding powder to water.Alginate should be mixed with a narrow,pliable spatula.

The mixing time of fast-setting alginate is:

Recommendations for mixing the alginate include:

Of the following,which will alter setting times for alginate?

Which type of impression material is the most popular for restorative procedures?

Alginate impression material may be referred to as a(n):

An advantage of using premeasured packets of alginate material includes packets are:

The dimensional change of polyethers is higher than that of the addition silicones.The polyether absorbs water and changes dimensions if stored in contact with water until equilibrium is reached.

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Direct Esthetic Restorative Materials

Dental Amalgam

Finishing, polishing, and Cleansing Materials

Cements

Model and Die Materials

Waxes

Casting Alloys, wrought Alloys, and Solders

Casting and Soldering

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters