Question 1

Diagnostic casts can be trimmed in a geometric form that is pleasing in appearance.

Accepted Answer

A) True 
 B)False  True

Question 2

Custom trays are (can) be made from ____________.

Accepted Answer

A)  thermoplastic material 
B)  vacuum resin 
C)  acrylic resin 
D)  all of the above 
A)  thermoplastic material 
B)  vacuum resin 
C)  acrylic resin 
D)  all of the above D

Question 3

Reversible hydrocolloid is maintained in the sol state if placed in a water storage bath of ____ degrees F.

Accepted Answer

A)  212 
B)  150 
C)  110 
D)  55 
A)  212 
B)  150 
C)  110 
D)  55 B

Question 4

Both alginate and agar-agar are derived from ____________.

Accepted Answer

A)  limestone 
B)  seaweed 
C)  gelatin 
D)  clay 
A)  limestone 
B)  seaweed 
C)  gelatin 
D)  clay

Question 5

Undercuts are ____________.

Accepted Answer

A)  areas that have been overprepped by the handpiece 
B)  areas that have been underprepped by the handpiece 
C)  recessed areas that are wider on bottom than on the top 
D)  none of the above 
A)  areas that have been overprepped by the handpiece 
B)  areas that have been underprepped by the handpiece 
C)  recessed areas that are wider on bottom than on the top 
D)  none of the above

Question 6

Polymerization is the same as ____________.

Accepted Answer

A)  curing 
B)  mixing 
C)  trimming 
D)  trying on in the patient's mouth 
A)  curing 
B)  mixing 
C)  trimming 
D)  trying on in the patient's mouth

Question 7

What is placed on the model during construction to allow room in the tray for the impression material?

Accepted Answer

A)  Stops 
B)  Spacer 
C)  Handle 
D)  None of the above 
A)  Stops 
B)  Spacer 
C)  Handle 
D)  None of the above

Question 8

The tray used for alginate impressions is (are) ____________.

Accepted Answer

A)  perforated 
B)  rim locked 
C)  either a or b 
D)  neither a nor b 
A)  perforated 
B)  rim locked 
C)  either a or b 
D)  neither a nor b

Question 9

It is very unlikely for cross-contamination of impression materials to occur between the treatment room and the laboratory.

Accepted Answer

A) True 
 B)False

Question 10

Silicone-based impression materials are an alternative to alginate materials.

Accepted Answer

A) True 
 B)False

Question 11

Polyether is supplied in ____________.

Accepted Answer

A)  powder or liquid form 
B)  two-paste form 
C)  single light-cured paste form 
D)  putty or wash form 
A)  powder or liquid form 
B)  two-paste form 
C)  single light-cured paste form 
D)  putty or wash form

Question 12

The removal of the alginate impression is done ____________.

Accepted Answer

A)  slowly 
B)  with a twisting motion 
C)  with a rocking motion 
D)  with a quick snap 
A)  slowly 
B)  with a twisting motion 
C)  with a rocking motion 
D)  with a quick snap

Question 13

Silicone impression materials have all the advantages of polysulfides without the disadvantages.

Accepted Answer

A) True 
 B)False

Question 14

Which classification is utility wax?

Accepted Answer

A)  Pattern 
B)  Processing 
C)  Impression 
D)  Study 
A)  Pattern 
B)  Processing 
C)  Impression 
D)  Study

Question 15

Heating the raw gypsum in the manufacturing process is known as ____________.

Accepted Answer

A)  mining 
B)  agitating 
C)  calcination 
D)  none of the above 
A)  mining 
B)  agitating 
C)  calcination 
D)  none of the above

Question 16

Alginate in the gel state is ____________.

Accepted Answer

A)  liquid 
B)  solid 
C)  gas 
D)  alginate does not go into the sol state 
A)  liquid 
B)  solid 
C)  gas 
D)  alginate does not go into the sol state

Question 17

Type III gypsum is used for ____________.

Accepted Answer

A)  study models 
B)  working models 
C)  dies 
D)  mounting casts on an articulator 
A)  study models 
B)  working models 
C)  dies 
D)  mounting casts on an articulator

Question 18

Another name for polysulfide impression material is ____________.

Accepted Answer

A)  rubber base 
B)  silicone 
C)  either a or b 
D)  neither a nor b 
A)  rubber base 
B)  silicone 
C)  either a or b 
D)  neither a nor b

Question 19

The ratio of water to powder for stone is ____ ml to 100 g.

Accepted Answer

A)  24 
B)  30 
C)  50 
D)  60 
A)  24 
B)  30 
C)  50 
D)  60

Question 20

When maxillary and mandibular models are trimmed and in occlusion, the overall height should be ____ inches.

Accepted Answer

A)  1.5 
B)  2 
C)  3 
D)  It does not matter. 
A)  1.5 
B)  2 
C)  3 
D)  It does not matter.

Exam 39: Laboratory Materials and Techniques

Diagnostic casts can be trimmed in a geometric form that is pleasing in appearance.

Custom trays are (can) be made from ____________.

Reversible hydrocolloid is maintained in the sol state if placed in a water storage bath of ____ degrees F.

Both alginate and agar-agar are derived from ____________.

Undercuts are ____________.

Polymerization is the same as ____________.

What is placed on the model during construction to allow room in the tray for the impression material?

The tray used for alginate impressions is (are) ____________.

It is very unlikely for cross-contamination of impression materials to occur between the treatment room and the laboratory.

Silicone-based impression materials are an alternative to alginate materials.

Polyether is supplied in ____________.

The removal of the alginate impression is done ____________.

Silicone impression materials have all the advantages of polysulfides without the disadvantages.

Which classification is utility wax?

Heating the raw gypsum in the manufacturing process is known as ____________.

Alginate in the gel state is ____________.

Type III gypsum is used for ____________.

Another name for polysulfide impression material is ____________.

The ratio of water to powder for stone is ____ ml to 100 g.

When maxillary and mandibular models are trimmed and in occlusion, the overall height should be ____ inches.

Introduction to the Dental Profession

Psychology Communication and Multicultural Interaction

Ethics Jurisprudence and the Health Information Portability and Accountability Act

Oral Health and Preventative Techniques

Nutrition

General Anatomy and Physiology

Head and Neck Anatomy

Embryology and Histology

Tooth Morphology

Microbiology

Infection Control

Management of Hazardous Materials

Preparation for Patient Care

Dental Charting

Pharmacology

Emergency Management

Introduction to the Dental Office and Basic Chairside Assisting

Basic Chairside Instruments and Tray Systems

Instrument Transfer and Maintaining the Operating Field

Anesthesia and Sedation

Introduction to Dental Radiography and Equipment

Production and Evaluation of Dental Radiographs

Extraoral and Digital Radiography

Endodontics

Oral and Maxillofacial Surgery

Dental Implants

Oral Pathology

Orthodontics

Pediatric Dentistry

Dental Sealants

Periodontics

Coronal Polish

Fixed Prosthodontics and Gingival Retraction

Computerized Impression and Restorative Systems

Cosmetic Dentistry and Whitening

Removable Prosthodontics

Dental Cements Bases Liners and Bonding Agents

Restorative Materials Matrix and Wedge

Dental Office Management

Employment Strategies

Filters