Question 1

Match the items with the correct description below.
-Alginate

Accepted Answer

A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office 
A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office

Question 2

Which of the following is true of vinyl polyether silicone?

Accepted Answer

A)  It is hydrophobic. 
B)  It flows well but has low tear strength. 
C)  It can tolerate a little moisture around the preparation. 
D)  It is available in three viscosities: light,monophase,and heavy. 
A)  It is hydrophobic. 
B)  It flows well but has low tear strength. 
C)  It can tolerate a little moisture around the preparation. 
D)  It is available in three viscosities: light,monophase,and heavy.

Question 3

When mixing alginate,as the water temperature increases,the working time:

Accepted Answer

A)  increases. 
B)  decreases. 
C)  stays the same. 
A)  increases. 
B)  decreases. 
C)  stays the same.

Question 4

Impressions taken with polyvinyl siloxane should be poured within:

Accepted Answer

A)  30 minutes. 
B)  1 hour. 
C)  1 day. 
D)  1 week. 
A)  30 minutes. 
B)  1 hour. 
C)  1 day. 
D)  1 week.

Question 5

When preparing to take an alginate impression,which of the following is not necessary?

Accepted Answer

A)  Fluff the material to mix. 
B)  Wear a mask and eyewear. 
C)  Have patient use antibacterial rinse. 
D)  Use a try-in tray for fit. 
A)  Fluff the material to mix. 
B)  Wear a mask and eyewear. 
C)  Have patient use antibacterial rinse. 
D)  Use a try-in tray for fit.

Question 6

Which of the following disinfectants are compatible with addition silicone impression materials?
1)1:10 sodium hypochlorite
2)1:213 iodophors
3)Glutaraldehydes
4)Complex phenolics

Accepted Answer

A)  1,2,3,4 
B)  1,2,3 
C)  2,3,4 
D)  2,3 
A)  1,2,3,4 
B)  1,2,3 
C)  2,3,4 
D)  2,3

Question 7

A dental impression is a/an _____ reproduction of the teeth.

Accepted Answer

A)  positive 
B)  negative 
C)  distorted 
D)  approximate 
A)  positive 
B)  negative 
C)  distorted 
D)  approximate

Question 8

A properly extended maxillary alginate impression tray will extend posteriorly enough to include which oral landmark?

Accepted Answer

A)  Retromolar pad 
B)  Hamular notch 
C)  Soft palate 
D)  Uvula 
A)  Retromolar pad 
B)  Hamular notch 
C)  Soft palate 
D)  Uvula

Question 9

Match the items with the correct description below.
-Reversible hydrocolloid

Accepted Answer

A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office 
A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office

Question 10

Match the items with the correct description below.
-Irreversible hydrocolloid

Accepted Answer

A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office 
A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office

Question 11

Why would a dentist choose to use an addition silicone over a condensation silicone?

Accepted Answer

A)  Addition is stronger than condensation. 
B)  Addition does not distort as badly. 
C)  Addition is cleaner to use. 
D)  Addition tastes better. 
A)  Addition is stronger than condensation. 
B)  Addition does not distort as badly. 
C)  Addition is cleaner to use. 
D)  Addition tastes better.

Question 12

Containers of alginate such as cans or plastic containers should be turned end-over-end a few times to decompress the powder and mix the ingredients.Alginate dust is potentially hazardous to inhale because it contains silicon dioxide in the diatomaceous earth fillers.

Accepted Answer

A)  Both statements are true. 
B)  Both statements are false. 
C)  The first statement is true;the second statement is false. 
D)  The first statement is false;the second statement is true. 
A)  Both statements are true. 
B)  Both statements are false. 
C)  The first statement is true;the second statement is false. 
D)  The first statement is false;the second statement is true.

Question 13

Which of the following elastomers are the most hydrophilic?

Accepted Answer

A)  Polyethers 
B)  Polysulfides 
C)  Addition silicones 
D)  Condensation silicones 
A)  Polyethers 
B)  Polysulfides 
C)  Addition silicones 
D)  Condensation silicones

Question 14

Which statement is true about impression trays?

Accepted Answer

A)  The triple tray is a custom full-arch tray used for bite registration. 
B)  Stock trays are made of plastic rather than metal and can be solid or perforated. 
C)  Plastic trays are inexpensive and disposable,whereas metal trays are more expensive and must be cleaned and sterilized between uses. 
D)  Custom trays are constructed in the patient's mouth with chemically cured,light-cured,or thermoplastic resins on casts of the teeth. 
A)  The triple tray is a custom full-arch tray used for bite registration. 
B)  Stock trays are made of plastic rather than metal and can be solid or perforated. 
C)  Plastic trays are inexpensive and disposable,whereas metal trays are more expensive and must be cleaned and sterilized between uses. 
D)  Custom trays are constructed in the patient's mouth with chemically cured,light-cured,or thermoplastic resins on casts of the teeth.

Question 15

Impressions taken with polyether should be poured within what time period?

Accepted Answer

A)  30 minutes 
B)  1 hour 
C)  1 day 
D)  1 week 
A)  30 minutes 
B)  1 hour 
C)  1 day 
D)  1 week

Question 16

Match the items with the correct description below.
-Hydrocolloid

Accepted Answer

A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office 
A) An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature 
B) Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance 
C) An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth 
D) A water-based colloid used as an elastic impression material 
E) A versatile irreversible hydrocolloid that is the most used impression material in the dental office

Match the items with the correct description below. -Alginate

Which of the following is true of vinyl polyether silicone?

When mixing alginate,as the water temperature increases,the working time:

Impressions taken with polyvinyl siloxane should be poured within:

When preparing to take an alginate impression,which of the following is not necessary?

Which of the following disinfectants are compatible with addition silicone impression materials? 1)1:10 sodium hypochlorite 2)1:213 iodophors 3)Glutaraldehydes 4)Complex phenolics

A dental impression is a/an _____ reproduction of the teeth.

A properly extended maxillary alginate impression tray will extend posteriorly enough to include which oral landmark?

Match the items with the correct description below. -Reversible hydrocolloid

Match the items with the correct description below. -Irreversible hydrocolloid

Why would a dentist choose to use an addition silicone over a condensation silicone?

Containers of alginate such as cans or plastic containers should be turned end-over-end a few times to decompress the powder and mix the ingredients.Alginate dust is potentially hazardous to inhale because it contains silicon dioxide in the diatomaceous earth fillers.

Which of the following elastomers are the most hydrophilic?

Which statement is true about impression trays?

Impressions taken with polyether should be poured within what time period?

Match the items with the correct description below. -Hydrocolloid

Introduction to Dental Materials

Oral Environment and Patient Considerations

Physical and Mechanical Properties of Dental Materials

General Handling and Safety of Dental Materials in the Dental Office

Principles of Bonding

Composites, glass Ionomers, and Compomers

Preventive and Desensitizing Materials

Teeth Whitening Materials and Procedures

Dental Ceramics

Dental Amalgam

Casting Metals, solders, and Wrought Metal Alloys

Dental Implants

Abrasion, finishing, and Polishing

Dental Cement

Gypsum and Wax Products

Polymers for Prosthetic Dentistry

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters

Exam 15: Impression Materials

Match the items with the correct description below. -Alginate

Which of the following is true of vinyl polyether silicone?

When mixing alginate,as the water temperature increases,the working time:

Impressions taken with polyvinyl siloxane should be poured within:

When preparing to take an alginate impression,which of the following is not necessary?

Which of the following disinfectants are compatible with addition silicone impression materials? 1)1:10 sodium hypochlorite 2)1:213 iodophors 3)Glutaraldehydes 4)Complex phenolics

A dental impression is a/an _____ reproduction of the teeth.

A properly extended maxillary alginate impression tray will extend posteriorly enough to include which oral landmark?

Match the items with the correct description below. -Reversible hydrocolloid

Match the items with the correct description below. -Irreversible hydrocolloid

Why would a dentist choose to use an addition silicone over a condensation silicone?

Containers of alginate such as cans or plastic containers should be turned end-over-end a few times to decompress the powder and mix the ingredients.Alginate dust is potentially hazardous to inhale because it contains silicon dioxide in the diatomaceous earth fillers.

Which of the following elastomers are the most hydrophilic?

Which statement is true about impression trays?

Impressions taken with polyether should be poured within what time period?

Match the items with the correct description below. -Hydrocolloid

Introduction to Dental Materials

Oral Environment and Patient Considerations

Physical and Mechanical Properties of Dental Materials

General Handling and Safety of Dental Materials in the Dental Office

Principles of Bonding

Composites, glass Ionomers, and Compomers

Preventive and Desensitizing Materials

Teeth Whitening Materials and Procedures

Dental Ceramics

Dental Amalgam

Casting Metals, solders, and Wrought Metal Alloys

Dental Implants

Abrasion, finishing, and Polishing

Dental Cement

Gypsum and Wax Products

Polymers for Prosthetic Dentistry

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters