Question 1

The putty material in silicone impression materials is ____________.

Accepted Answer

A)  placed in the syringe 
B)  mixed as it is dispensed in the extruder gun 
C)  placed in the tray 
D)  none of the above 
A)  placed in the syringe 
B)  mixed as it is dispensed in the extruder gun 
C)  placed in the tray 
D)  none of the above

Question 2

Which classification is inlay wax?

Accepted Answer

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

Question 3

When loading the mandibular tray with alginate, the material is loaded in ____________.

Accepted Answer

A)  several increments 
B)  one increment from the posterior 
C)  several increments from the lingual and posterior 
D)  two increments from the lingual 
A)  several increments 
B)  one increment from the posterior 
C)  several increments from the lingual and posterior 
D)  two increments from the lingual

Question 4

Syneresis of an impression occurs when ____________.

Accepted Answer

A)  additional water is taken in 
B)  water is lost 
C)  the impression is left to soak in water 
D)  none of the above 
A)  additional water is taken in 
B)  water is lost 
C)  the impression is left to soak in water 
D)  none of the above

Question 5

An articulator is used to duplicate the patient's occlusion on models.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following gypsum products is the weakest?

Accepted Answer

A)  Plaster 
B)  Lab stone 
C)  Orthodontic stone 
D)  Die stone 
A)  Plaster 
B)  Lab stone 
C)  Orthodontic stone 
D)  Die stone

Question 7

When making a custom acrylic crown, a matrix of some type must be used.

Accepted Answer

A) True 
 B)False

Question 8

Alginate in the sol 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 9

Before trimming plaster models, dry models should be soaked in water for ____________.

Accepted Answer

A)  2 minutes 
B)  5 minutes 
C)  10 minutes 
D)  24 hours 
A)  2 minutes 
B)  5 minutes 
C)  10 minutes 
D)  24 hours

Question 10

Adjusting the height of an aluminum temporary crown is done by ____________.

Accepted Answer

A)  trimming the gingival margin 
B)  using an acrylic bur on the occlusal of the temporary crown 
C)  selecting a short temporary crown 
D)  the height cannot be adjusted 
A)  trimming the gingival margin 
B)  using an acrylic bur on the occlusal of the temporary crown 
C)  selecting a short temporary crown 
D)  the height cannot be adjusted

Question 11

Agar-agar is tempered for ____ minutes before placing it in the patient's mouth.

Accepted Answer

A)  5 
B)  10 
C)  20 
D)  Tempering is not necessary. 
A)  5 
B)  10 
C)  20 
D)  Tempering is not necessary.

Question 12

Trimmed diagnostic models should exhibit ____ -inch base each.

Accepted Answer

A)  1/2 
B)  1 
C)  2 
D)  2.5 
A)  1/2 
B)  1 
C)  2 
D)  2.5

Question 13

The most convenient way to alter the setting time for alginate is to ____________.

Accepted Answer

A)  add less or more water 
B)  add less or more powder 
C)  adjust the water temperature 
D)  The setting time should never be altered. 
A)  add less or more water 
B)  add less or more powder 
C)  adjust the water temperature 
D)  The setting time should never be altered.

Question 14

Each portion of the trimmed diagnostic cast is trimmed to ____ inch of anatomic portion.

Accepted Answer

A)  1/2 
B)  1 
C)  2 
D)  1.5 
A)  1/2 
B)  1 
C)  2 
D)  1.5

Question 15

When taking an alginate impression, which area is seated first?

Accepted Answer

A)  Anterior 
B)  Posterior 
C)  The tray is seated straight downward. 
D)  It does not matter which area is seated first. 
A)  Anterior 
B)  Posterior 
C)  The tray is seated straight downward. 
D)  It does not matter which area is seated first.

Question 16

One of the first impression materials that has good detail is reversible hydrocolloid impression material.

Accepted Answer

A) True 
 B)False

Question 17

Match between columns
                        Premises: Impression plaster
Die stone
Laboratory stone
Model or lab plaster

Accepted Answer

The Answer of Type IV and Type II and Type is...

Question 18

The most common use for alginate is ____________.

Accepted Answer

A)  impressions for crown and bridges 
B)  occlusal registrations 
C)  impressions for study models 
D)  final impressions for a full denture 
A)  impressions for crown and bridges 
B)  occlusal registrations 
C)  impressions for study models 
D)  final impressions for a full denture

Question 19

The ratio of water to powder for model plaster 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

The process of placing wax around the borders of the tray is ____________.

Accepted Answer

A)  beading 
B)  waxing 
C)  addition 
D)  luting 
A)  beading 
B)  waxing 
C)  addition 
D)  luting

Exam 39: Laboratory Materials and Techniques

The putty material in silicone impression materials is ____________.

Which classification is inlay wax?

When loading the mandibular tray with alginate, the material is loaded in ____________.

Syneresis of an impression occurs when ____________.

An articulator is used to duplicate the patient's occlusion on models.

Which of the following gypsum products is the weakest?

When making a custom acrylic crown, a matrix of some type must be used.

Alginate in the sol state is ____________.

Before trimming plaster models, dry models should be soaked in water for ____________.

Adjusting the height of an aluminum temporary crown is done by ____________.

Agar-agar is tempered for ____ minutes before placing it in the patient's mouth.

Trimmed diagnostic models should exhibit ____ -inch base each.

The most convenient way to alter the setting time for alginate is to ____________.

Each portion of the trimmed diagnostic cast is trimmed to ____ inch of anatomic portion.

When taking an alginate impression, which area is seated first?

One of the first impression materials that has good detail is reversible hydrocolloid impression material.

The most common use for alginate is ____________.

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

The process of placing wax around the borders of the tray is ____________.

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