Question 1

The lead plate in the panoramic tubehead with an opening shaped like a narrow vertical slit is the:

Accepted Answer

A) exposure control. 
B) cephalostat. 
C) focal trough. 
D) collimator. 
A) exposure control. 
B) cephalostat. 
C) focal trough. 
D) collimator. D

Question 2

A dark radiolucent shadow that obscures the anterior teeth can indicate that the patient's:

Accepted Answer

A) chin was too low. 
B) head was posterior to the focal trough. 
C) lips were not closed on the bite-block during the exposure. 
D) tongue was not in contact with the palate during the exposure. 
A) chin was too low. 
B) head was posterior to the focal trough. 
C) lips were not closed on the bite-block during the exposure. 
D) tongue was not in contact with the palate during the exposure. C

Question 3

When a patient's chin is positioned too low during the panoramic exposure:

Accepted Answer

A) the mandibular incisors will appear blurred. 
B) the condyles will not be visible. 
C) detail in the posterior apical regions will be lost. 
D) both a and b occur. 
A) the mandibular incisors will appear blurred. 
B) the condyles will not be visible. 
C) detail in the posterior apical regions will be lost. 
D) both a and b occur. D

Question 4

Which of the following is not true of a panoramic tubehead?

Accepted Answer

A) It has a filament that produces electrons and a target that produces radiographs. 
B) The vertical angulation is adjustable. 
C) It always rotates behind the patient's head. 
D) The collimator is a lead plate with an opening shaped like a narrow vertical slit. 
A) It has a filament that produces electrons and a target that produces radiographs. 
B) The vertical angulation is adjustable. 
C) It always rotates behind the patient's head. 
D) The collimator is a lead plate with an opening shaped like a narrow vertical slit.

Question 5

The skull view that shows the bones of the face and skull and the soft tissue profile is the _____ projection.

Accepted Answer

A) lateral cephalometric 
B) posteroanterior 
C) magnetic resonance 
D) temporomandibular 
A) lateral cephalometric 
B) posteroanterior 
C) magnetic resonance 
D) temporomandibular

Question 6

The main components of the panoramic unit include exposure controls and the:

Accepted Answer

A) x-ray tubehead. 
B) x-ray tubehead, position-indicator device. 
C) x-ray tubehead, head positioner. 
D) position-indicator device, head positioner. 
A) x-ray tubehead. 
B) x-ray tubehead, position-indicator device. 
C) x-ray tubehead, head positioner. 
D) position-indicator device, head positioner.

Question 7

A panoramic image allows the dentist to:

Accepted Answer

A) detect caries. 
B) view the entire dentition and related structures in one film. 
C) view all of the sinus cavities. 
D) do both a and b 
A) detect caries. 
B) view the entire dentition and related structures in one film. 
C) view all of the sinus cavities. 
D) do both a and b

Question 8

A grid:

Accepted Answer

A) reduces the amount of scatter radiation that reaches the patient. 
B) decreases the contrast of the radiographic image. 
C) decreases the film fog, increasing the contrast of the image. 
D) accomplishes both a and c 
A) reduces the amount of scatter radiation that reaches the patient. 
B) decreases the contrast of the radiographic image. 
C) decreases the film fog, increasing the contrast of the image. 
D) accomplishes both a and c

Question 9

All of the following statements about the panoramic tubehead are true except the

Accepted Answer

A) tubehead rotates the film behind the patient's head. 
B) tubehead rotates behind the patient's head. 
C) vertical angulation of the tubehead is not adjustable. 
D) tubehead houses the filament that produces electrons and target that produces radiographs. 
A) tubehead rotates the film behind the patient's head. 
B) tubehead rotates behind the patient's head. 
C) vertical angulation of the tubehead is not adjustable. 
D) tubehead houses the filament that produces electrons and target that produces radiographs.

Question 10

Advantages of panoramic imaging,when contrasted with intraoral imaging,include:

Accepted Answer

A) less radiation exposure. 
B) no focal trough limitations. 
C) lower equipment cost. 
D) both a and c 
A) less radiation exposure. 
B) no focal trough limitations. 
C) lower equipment cost. 
D) both a and c

Question 11

A ghost image will appear _____ than normal and on the _____ side of the image.

Accepted Answer

A) larger; opposite 
B) larger; same 
C) smaller; opposite 
D) smaller; same 
A) larger; opposite 
B) larger; same 
C) smaller; opposite 
D) smaller; same

Question 12

When a patient's teeth are not positioned in the groove of the bite-block,the teeth will appear:

Accepted Answer

A) fat. 
B) skinny. 
C) tall. 
D) short. 
A) fat. 
B) skinny. 
C) tall. 
D) short.

Question 13

A radiopaque,cone-shaped artifact on a panoramic image that interferes with the diagnostic information is caused by the:

Accepted Answer

A) patient's chin was too high during the procedure. 
B) patient's lead apron was incorrectly placed or a lead apron with a thyroid collar was used. 
C) patient's head was posterior to the focal trough. 
D) patient moved during the procedure. 
A) patient's chin was too high during the procedure. 
B) patient's lead apron was incorrectly placed or a lead apron with a thyroid collar was used. 
C) patient's head was posterior to the focal trough. 
D) patient moved during the procedure.

Question 14

What new feature of the panoramic unit has allowed better resolution to show better details?

Accepted Answer

A) Cephalostat 
B) Focal trough 
C) Digital technology 
D) Magnetic resonance 
A) Cephalostat 
B) Focal trough 
C) Digital technology 
D) Magnetic resonance

Question 15

In panoramic imaging,_____ rotate(s)around the patient.

Accepted Answer

A) the film/sensor 
B) the tubehead 
C) both the film/sensor and the tubehead 
D) neither the film/sensor nor the tubehead 
A) the film/sensor 
B) the tubehead 
C) both the film/sensor and the tubehead 
D) neither the film/sensor nor the tubehead

Question 16

A patient wearing earrings or glasses must remove them before a panoramic x-ray image exposure; otherwise,a _____ will appear on the image.

Accepted Answer

A) dark area 
B) blurred area 
C) ghost image 
D) blurred area and a ghost image 
A) dark area 
B) blurred area 
C) ghost image 
D) blurred area and a ghost image

Question 17

When a patient's chin is too high during the panoramic exposure:

Accepted Answer

A) the maxillary premolars will be blurred. 
B) the floor of the nasal cavity will be superimposed over the roots of the mandibular teeth. 
C) a "reverse smile line" will appear on the radiograph. 
D) detail of the mandibular region will be lost. 
A) the maxillary premolars will be blurred. 
B) the floor of the nasal cavity will be superimposed over the roots of the mandibular teeth. 
C) a "reverse smile line" will appear on the radiograph. 
D) detail of the mandibular region will be lost.

Question 18

When a patient does not stand or sit with a straight spine:

Accepted Answer

A) the panoramic image will be blurred. 
B) an "exaggerated smile line" or curved downward smile line will appear. 
C) detail of the apical regions of the teeth will be lost. 
D) the cervical spine will appear as a radiopacity in the center of the film, obscuring the diagnostic information. 
A) the panoramic image will be blurred. 
B) an "exaggerated smile line" or curved downward smile line will appear. 
C) detail of the apical regions of the teeth will be lost. 
D) the cervical spine will appear as a radiopacity in the center of the film, obscuring the diagnostic information.

Question 19

When a dark radiolucent shadow obscures the apices of the maxillary teeth,the:

Accepted Answer

A) patient's lips were not closed on the bite-block during the exposure. 
B) patient's tongue was not in contact with the palate during the exposure. 
C) patient's head was posterior to the focal trough. 
D) patient needed to swallow. 
A) patient's lips were not closed on the bite-block during the exposure. 
B) patient's tongue was not in contact with the palate during the exposure. 
C) patient's head was posterior to the focal trough. 
D) patient needed to swallow.

Question 20

The exposure controls allow the _____ to be adjusted on the panoramic x-ray unit,to accommodate patients of different sizes.

Accepted Answer

A) exposure time 
B) vertical angulation 
C) horizontal angulation 
D) milliamperage and kilovoltage 
A) exposure time 
B) vertical angulation 
C) horizontal angulation 
D) milliamperage and kilovoltage

Exam 42: Extraoral Imaging

The lead plate in the panoramic tubehead with an opening shaped like a narrow vertical slit is the:

A dark radiolucent shadow that obscures the anterior teeth can indicate that the patient's:

When a patient's chin is positioned too low during the panoramic exposure:

Which of the following is not true of a panoramic tubehead?

The skull view that shows the bones of the face and skull and the soft tissue profile is the _____ projection.

The main components of the panoramic unit include exposure controls and the:

A panoramic image allows the dentist to:

A grid:

All of the following statements about the panoramic tubehead are true except the

Advantages of panoramic imaging,when contrasted with intraoral imaging,include:

A ghost image will appear _____ than normal and on the _____ side of the image.

When a patient's teeth are not positioned in the groove of the bite-block,the teeth will appear:

A radiopaque,cone-shaped artifact on a panoramic image that interferes with the diagnostic information is caused by the:

What new feature of the panoramic unit has allowed better resolution to show better details?

In panoramic imaging,_____ rotate(s)around the patient.

A patient wearing earrings or glasses must remove them before a panoramic x-ray image exposure; otherwise,a _____ will appear on the image.

When a patient's chin is too high during the panoramic exposure:

When a patient does not stand or sit with a straight spine:

When a dark radiolucent shadow obscures the apices of the maxillary teeth,the:

The exposure controls allow the _____ to be adjusted on the panoramic x-ray unit,to accommodate patients of different sizes.

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

Restorative and Esthetic Dental Materials

Dental Liners, Bases, and Bonding Systems

Dental Cements

Impression Materials

Laboratory Materials and Procedures

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

A ghost image will appear _ than normal and on the _ side of the image.