Question 1

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) Nose 
A) Midline 
B) Upper first molar 
C) Lower canine 
D) Nose

Question 2

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. 
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.

Question 3

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

Question 4

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. 
A) prepare the resin. 
B) make a spacer. 
C) prepare a diagnostic model. 
D) place blockout material.

Question 5

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; foundation 
A) art; anatomical 
B) anatomical; foundation 
C) anatomical; art 
D) oral cavity; foundation

Question 6

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; pointed 
A) pointed; rounded 
B) rounded; pointed 
C) rounded; rounded 
D) pointed; pointed

Question 7

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

Accepted Answer

A) I 
B) II 
C) III 
A) I 
B) II 
C) III

Question 8

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 lathe 
A) Sandblaster 
B) Model trimmer 
C) Vacuum former 
D) Dental lathe

Question 9

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 above 
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 above

Question 10

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

Accepted Answer

A) Edentulous 
B) Dentulous 
C) Partially edentulous 
D) All types 
A) Edentulous 
B) Dentulous 
C) Partially edentulous 
D) All types

Question 11

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 registration 
A) Sticky 
B) Inlay casting 
C) Baseplate 
D) Bite registration

Question 12

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

Accepted Answer

A) 10 
B) 19 
C) 30 
D) 45 
A) 10 
B) 19 
C) 30 
D) 45

Question 13

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 above 
A) A spacer 
B) Stops 
C) Undercuts 
D) All of the above

Question 14

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. 
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.

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. 
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.

Question 16

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

Exam 47: Laboratory Materials and Procedures

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

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

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

The first step in making a custom tray is to:

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.

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

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

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

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

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

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

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

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

What should be done to an impression before pouring?

Which statement is incorrect regarding safety precautions in the laboratory?

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

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

Principles of Pharmacology

Assisting in a Medical Emergency

The Dental Office

Delivering Dental Care

Dental Hand Instruments

Dental Handpieces and Accessories

Moisture Control

Anesthesia and Pain Control

Foundations of Radiography, Radiographic Equipment, and Radiation Safety

Digital Imaging, Dental Film, and Processing Radiographs

Legal Issues, Quality Assurance, and Infection Prevention

Intraoral Imaging

Extraoral Imaging

Restorative and Esthetic Dental Materials

Dental Liners, Bases, and Bonding Systems

Dental Cements

Impression Materials

General Dentistry

Matrix Systems for Restorative Dentistry

Fixed Prosthodontics

Provisional Coverage

Removable Prosthodontics

Dental Implants

Endodontics

Periodontics

Oral and Maxillofacial Surgery

Pediatric Dentistry

Coronal Polishing

Dental Sealants

Orthodontics

Communication in the Dental Office

Business Operating Systems

Financial Management in the Dental Office

Marketing Your Skills

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.

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