Question 1

A model consists of the _____ portion,which represents the teeth and tissues of the mouth,and the _____ portion,which forms the base of the cast.

Accepted Answer

A)  art; anatomical
B)  anatomical; foundation
C)  anatomical; art
D)  oral cavity; foundationE) None of the above
F) B) and D)

Question 2

The first step in making a custom tray is to:

Accepted Answer

A)  prepare the resin.
B)  make a spacer.
C)  prepare a diagnostic model.
D)  place blockout material.E) A) and D)
F) None of the above

Question 3

A trimmed maxillary model will be _____ at the anterior portion,and the mandibular model will be _____ at the anterior portion.

Accepted Answer

A)  pointed; rounded
B)  rounded; pointed
C)  rounded; rounded
D)  pointed; pointedE) A) and D)
F) None of the above

Question 4

When constructing custom trays it is best to remove excess material with a lab knife after it has cured.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is used to prevent a custom impression tray from sitting too deeply when taking the impression?

Accepted Answer

A)  A spacer
B)  Stops
C)  Undercuts
D)  All of the aboveE) C) and D)
F) A) and C)

Question 6

When taking a face-bow registration,the vertical indicator rod should be aligned with which oral landmark?

Accepted Answer

A)  Midline
B)  Upper first molar
C)  Lower canine
D)  NoseE) C) and D)
F) B) and D)

Question 7

What is the powder-to-water ratio for high-strength stone?

Accepted Answer

A)  10
B)  19
C)  30
D)  45E) All of the above
F) None of the above

Question 8

Light-cured resin can be used to make trays for which type impressions?

Accepted Answer

A)  Edentulous
B)  Dentulous
C)  Partially edentulous
D)  All typesE) C) and D)
F) A) and B)

Question 9

What is one advantage of having laboratory equipment and trained personnel in the dental office?

Accepted Answer

A)  Overhead costs rise.
B)  The dentist or private laboratory technician can handle larger cases.
C)  More work will be completed by the commercial laboratory.
D)  There is less work to do for the private dental laboratory technician.E) B) and D)
F) A) and B)

Question 10

What should be done to an impression before pouring?

Accepted Answer

A)  Dry the impression completely with a blast of air.
B)  Use a gentle stream of air to remove excess moisture.
C)  Have the impression saturated with moisture.
D)  Leave disinfecting solution in the impression.E) C) and D)
F) B) and C)

Question 11

Which item is used to polish or trim custom trays,provisional coverage,dentures,and indirect restorations?

Accepted Answer

A)  Sandblaster
B)  Model trimmer
C)  Vacuum former
D)  Dental latheE) A) and B)
F) A) and C)

Question 12

Which methods are used to protect against biohazard contamination from impressions?

Accepted Answer

A)  Disinfecting impressions in the treatment room before bringing them to the laboratory
B)  Disinfecting laboratory benches and other contaminated items after use
C)  Disinfecting laboratory benches and other contaminated items before use
D)  All of the aboveE) B) and C)
F) None of the above

Question 13

Which type of baseplate wax is a softer and used for denture construction?

Accepted Answer

A)  I
B)  II
C)  IIID) A) and B)
E) A) and C)

Question 14

Which type of wax is preformed with a thin sheet of aluminum foil between the layers?

Accepted Answer

A)  Sticky
B)  Inlay casting
C)  Baseplate
D)  Bite registrationE) A) and B)
F) None of the above

Question 15

Which statement is incorrect regarding safety precautions in the laboratory?

Accepted Answer

A)  PPE should be worn while working in the laboratory.
B)  Manufacturer's instructions should be followed for equipment operation.
C)  This is the appropriate place for eating and drinking in the dental office.
D)  The work areas should be kept clean before and after procedures.E) B) and D)
F) A) and B)

Question 16

The ______ is the measurement of where the teeth are positioned when the joints are aligned correctly and before the teeth actually come together.

Accepted Answer

A)  bite record
B)  articulator
C)  centric relation
D)  Both a and c are correct.E) B) and D)
F) A) and D)

Exam 47: Laboratory Materials and Procedures

What is the powder-to-water ratio for high-strength stone?

Correct Answer
verified

What should be done to an impression before pouring?

Correct Answer
verified

Light-cured resin can be used to make trays for which type impressions?

Correct Answer
verified

A trimmed maxillary model will be _ at the anterior portion,and the mandibular model will be _ at the anterior portion.

Correct Answer
verified

Which statement is incorrect regarding safety precautions in the laboratory?

Correct Answer
verified

Which item is used to polish or trim custom trays,provisional coverage,dentures,and indirect restorations?

Correct Answer
verified

Which of the following is used to prevent a custom impression tray from sitting too deeply when taking the impression?

Correct Answer
verified

When constructing custom trays it is best to remove excess material with a lab knife after it has cured.

Correct Answer
verified

Which methods are used to protect against biohazard contamination from impressions?

Correct Answer
verified

When taking a face-bow registration,the vertical indicator rod should be aligned with which oral landmark?

Correct Answer
verified

A model consists of the _ portion,which represents the teeth and tissues of the mouth,and the _ portion,which forms the base of the cast.

Correct Answer
verified

What is one advantage of having laboratory equipment and trained personnel in the dental office?

Correct Answer
verified

Which type of baseplate wax is a softer and used for denture construction?

Correct Answer
verified

The first step in making a custom tray is to:

Correct Answer
verified

The ______ is the measurement of where the teeth are positioned when the joints are aligned correctly and before the teeth actually come together.

Correct Answer
verified

Which type of wax is preformed with a thin sheet of aluminum foil between the layers?

Correct Answer
verified

Exam 47: Laboratory Materials and Procedures

What is the powder-to-water ratio for high-strength stone?

Correct AnswerverifiedShow Answer

What should be done to an impression before pouring?

Correct AnswerverifiedShow Answer

Light-cured resin can be used to make trays for which type impressions?

Correct AnswerverifiedShow Answer

A trimmed maxillary model will be _____ at the anterior portion,and the mandibular model will be _____ at the anterior portion.

Correct AnswerverifiedShow Answer

Which statement is incorrect regarding safety precautions in the laboratory?

Correct AnswerverifiedShow Answer

Which item is used to polish or trim custom trays,provisional coverage,dentures,and indirect restorations?

Correct AnswerverifiedShow Answer

Which of the following is used to prevent a custom impression tray from sitting too deeply when taking the impression?

Correct AnswerverifiedShow Answer

When constructing custom trays it is best to remove excess material with a lab knife after it has cured.

Correct AnswerverifiedShow Answer

Which methods are used to protect against biohazard contamination from impressions?

Correct AnswerverifiedShow Answer

When taking a face-bow registration,the vertical indicator rod should be aligned with which oral landmark?

Correct AnswerverifiedShow Answer

A model consists of the _____ portion,which represents the teeth and tissues of the mouth,and the _____ portion,which forms the base of the cast.

Correct AnswerverifiedShow Answer

What is one advantage of having laboratory equipment and trained personnel in the dental office?

Correct AnswerverifiedShow Answer

Which type of baseplate wax is a softer and used for denture construction?

Correct AnswerverifiedShow Answer

The first step in making a custom tray is to:

Correct AnswerverifiedShow Answer

The ______ is the measurement of where the teeth are positioned when the joints are aligned correctly and before the teeth actually come together.

Correct AnswerverifiedShow Answer

Which type of wax is preformed with a thin sheet of aluminum foil between the layers?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A trimmed maxillary model will be _ at the anterior portion,and the mandibular model will be _ at the anterior portion.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A model consists of the _ portion,which represents the teeth and tissues of the mouth,and the _ portion,which forms the base of the cast.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified