Question 1

An impression tray should be sufficiently deep to allow _____ mm of material between the tray and the incisal or occlusal edges of the teeth.

Accepted Answer

A) 0.5 
B) 2 to 3 
C) 6 to 8 
D) 10 to 12 
A) 0.5 
B) 2 to 3 
C) 6 to 8 
D) 10 to 12

Question 2

Alginate impressions should be removed from the mouth by:

Accepted Answer

A) using a gentle rocking movement. 
B) using one quick, snap-out motion. 
C) by twisting the tray sideways. 
D) using a vigorous back and forth action. 
A) using a gentle rocking movement. 
B) using one quick, snap-out motion. 
C) by twisting the tray sideways. 
D) using a vigorous back and forth action.

Question 3

The irreversible hydrocolloid material used most widely for preliminary impressions is:

Accepted Answer

A) light-bodied material. 
B) alginate. 
C) polysulfide. 
D) polyether. 
A) light-bodied material. 
B) alginate. 
C) polysulfide. 
D) polyether.

Question 4

The _____ portion of the maxillary tray should be seated in the mouth first.

Accepted Answer

A) anterior 
B) posterior 
C) right side 
D) left side 
A) anterior 
B) posterior 
C) right side 
D) left side

Question 5

The three curing stages are:

Accepted Answer

A) first impression, setting phase, final impression. 
B) initial set, final set, final cure. 
C) initial impression, curing stage, final impression. 
D) first set, curing set, final set. 
A) first impression, setting phase, final impression. 
B) initial set, final set, final cure. 
C) initial impression, curing stage, final impression. 
D) first set, curing set, final set.

Question 6

A preliminary impression would be used for:

Accepted Answer

A) custom trays. 
B) indirect restorations. 
C) partial or full dentures. 
D) implants. 
A) custom trays. 
B) indirect restorations. 
C) partial or full dentures. 
D) implants.

Question 7

Impression disinfection:

Accepted Answer

A) should be performed in the laboratory. 
B) should be performed before leaving the treatment area. 
C) should be performed wherever the assistant has the time. 
D) is not necessary, provided the impression has been thoroughly rinsed. 
A) should be performed in the laboratory. 
B) should be performed before leaving the treatment area. 
C) should be performed wherever the assistant has the time. 
D) is not necessary, provided the impression has been thoroughly rinsed.

Question 8

A(n) _____ is taken to produce a reproduction of the occlusal relationship of the maxillary and mandibular teeth when the mouth is occluded.

Accepted Answer

A) final impression 
B) preliminary impression 
C) bite registration 
D) articulated impression 
A) final impression 
B) preliminary impression 
C) bite registration 
D) articulated impression

Question 9

The atmosphere that is best for storing impressions is ____% relative humidity.

Accepted Answer

A) 70 
B) 10 
C) 45 
D) 100 
A) 70 
B) 10 
C) 45 
D) 100

Exam 46: Impression Materials

An impression tray should be sufficiently deep to allow _____ mm of material between the tray and the incisal or occlusal edges of the teeth.

Alginate impressions should be removed from the mouth by:

The irreversible hydrocolloid material used most widely for preliminary impressions is:

The _____ portion of the maxillary tray should be seated in the mouth first.

The three curing stages are:

A preliminary impression would be used for:

Impression disinfection:

A(n) _____ is taken to produce a reproduction of the occlusal relationship of the maxillary and mandibular teeth when the mouth is occluded.

The atmosphere that is best for storing impressions is ____% relative humidity.

History of Dentistry

The Professional Dental Assistant

The Dental Healthcare Team

Dental Ethics

Dentistry and the Law

General Anatomy

General Physiology

Oral Embryology and Histology

Head and Neck Anatomy

Landmarks of the Face and Oral Cavity

Overview of the Dentitions

Tooth Morphology

Dental Caries

Periodontal Disease

Preventive Dentistry

Nutrition

Oral Pathology

Microbiology

Disease Transmission and Infection Prevention

Principles and Techniques of Disinfection

Principles and Techniques of Instrument Processing and Sterilization

Regulatory and Advisory Agencies

Chemical and Waste Management

Dental Unit Waterlines

Ergonomics

The Patient Record

Vital Signs

Oral Diagnosis and Treatment Planning

The Special Needs and Medically Compromised Patient

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Assisting in a Medical Emergency

The Dental Office

Delivering Dental Care

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Foundations of Radiography, Radiographic Equipment, and Radiation Safety

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Legal Issues, Quality Assurance, and Infection Prevention

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Restorative and Esthetic Dental Materials

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Laboratory Materials and Procedures

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