Deck 17: The Panoramic Examination

Question 1

Each of the following statements regarding orientation of the occlusal radiographic image receptor is correct EXCEPT one. Which one is the EXCEPTION?

A) If using film, the white side must face the arch of interest.
B) The image receptor must be placed in the mouth with the long dimension horizontal.
C) The image receptor should protrude from the mouth about ¼ inch.
D) If using film, the embossed dot should be positioned toward the anterior.

Answer 1

The image receptor must be placed in the mouth with the long dimension horizontal.

Question 2

The patient's head should be reclined and the chin tipped upward for which occlusal projection?

A) Maxillary anterior topographical
B) Maxillary posterior topographical
C) Mandibular posterior topographical
D) Mandibular cross-sectional

Answer 2

Mandibular cross-sectional

Question 3

Which of the following statements is correct?

A) Topographical occlusal radiographs yield a greater amount of information in the alveolar crest and apical areas than periapical radiographs.
B) Topographical occlusal radiographs may be exposed only on the maxillary arch.
C) Cross-sectional occlusal radiographs work best to image the maxilla.
D) Topographical occlusal radiographs cannot be used on children.

Answer 3

Topographical occlusal radiographs yield a greater amount of information in the alveolar crest and apical areas than periapical radiographs.

Question 4

Which of these statements is FALSE?

A) Cross-sectional occlusal radiographs of the mandible are taken with the occlusal plane perpendicular to the floor.
B) Topographical occlusal radiographs of the mandible may be taken with the head positioned the same as for maxillary topographical occlusal radiographs.
C) An image receptor holder is not required for stabilization of the image receptor.
D) Mandibular topographical radiographs are taken with the midsaggital plane parallel to the floor.

Question 5

Through a point on the middle of the chin toward the center of the image receptor describes the recommended point of entry of the central ray of the x-ray beam for which of the following occlusal radiographs?

A) Maxillary anterior topographical
B) Maxillary posterior topographical
C) Mandibular anterior topographical
D) Mandibular posterior topographical

Question 6

What size image receptor is used for occlusal radiographs on most adult patients?

A) 1
B) 2
C) 3
D) 4

Question 7

The thyroid collar may be in the path of the primary beam during which occlusal technique?

A) Maxillary posterior topographical
B) Mandibular anterior topographical
C) Mandibular posterior topographical
D) Mandibular cross-sectional

Question 8

Each of the following is a use of an occlusal radiograph EXCEPT one. Which one is the EXCEPTION?

A) Detecting incipient, interproximal caries
B) Locating soft tissue calcifications
C) Assisting in the evaluation of fractures
D) Revealing retained roots of extracted teeth

Question 9

The embossed identification dot on occlusal film should be positioned toward the:

A) anterior.
B) posterior.
C) mesial.
D) distal.

Question 10

Which of the following statements regarding managing occlusal radiograph exposures is FALSE?

A) Exposure factors are the same as those used for periapical and bitewing radiographs in the same region.
B) The open end of the PID should be positioned as close to the patient's skin as possible, without touching.
C) A modification of the paralleling technique is used to determine the vertical angulation.
D) A shorter PID minimizes distortion.

Question 11

The topographical occlusal radiographic technique is similar to what technique?

A) Paralleling
B) Bisecting
C) Bitewing
D) Panoramic

Question 12

Which of the following statements is correct?

A) Occlusal radiographs have some amount of dimensional distortion.
B) The occlusal technique is similar to the paralleling technique.
C) Occlusal films should be inserted completely into the oral cavity.
D) An image receptor holder will allow for correct positioning of occlusal radiographs.

Question 13

A vertical +65-degree angulation is used for which occlusal radiograph?

A) Maxillary anterior topographical
B) Maxillary posterior topographical
C) Mandibular posterior topographical
D) Mandibular cross-sectional

Question 14

Which of the following occlusal radiographs yields more information about the location of tori and impacted or malpositioned teeth and calcifications of soft tissues?

A) Maxillary anterior topographical
B) Maxillary posterior topographical
C) Mandibular posterior topographical
D) Mandibular cross-sectional

Question 15

Through a point on the ala-tragus line below the outer cantus of the eye toward the center of the image receptor describes the recommended point of entry of the central ray of the x-ray beam for which of the following occlusal radiographs?

A) Maxillary anterior topographical
B) Maxillary posterior topographical
C) Mandibular anterior topographical
D) Mandibular posterior topographical

Question 16

A vertical, zero-degree angulation is used for exposure of which occlusal radiograph?

A) Maxillary posterior topographical
B) Mandibular anterior topographical
C) Mandibular posterior topographical
D) Mandibular cross-sectional

Question 17

Assuming that the patient's head is in the correct position, which of the following is the correct vertical angulation setting for a maxillary anterior topographical occlusal radiograph?

A) +65 degrees
B) +45 degrees
C) -55 degrees
D) -45 degrees

Question 18

Each of the following statements regarding occlusal radiographs is correct EXCEPT one. Which one is the EXCEPTION?

A) They do not require the use of an image receptor holder.
B) They images both of the arches on a single film.
C) They may be either topographical or cross-sectional.
D) They are placed in the mouth between the occlusal surfaces of the maxillary and mandibular teeth.

Question 19

Each of the following should be done prior to placing the image receptor intraorally EXCEPT one. Which one is the EXCEPTION?

A) Turning on the dental x-ray machine
B) Placing the tube head in the approximate position for the exposure
C) Selecting the appropriate exposure setting
D) Assembling a sterile image receptor holder

Question 20

Assuming that the patient's head is in the correct position, which of the following is the correct vertical angulation setting for a maxillary posterior topographical occlusal radiograph?

A) +65 degrees
B) +45 degrees
C) -55 degrees
D) -45 degrees

Question 21

The vertical angulation used for topographical occlusal radiographs follows the rules of the bisecting technique used for periapical radiographs.

Question 22

The occlusal examination may be made alone or to supplement periapical or bitewing radiographs.

Question 23

Topographical occlusal radiographs of the mandible may be taken with the head positioned the same as for maxillary topographical occlusal radiographs.

Question 24

If the patient's head is in correct position, predetermined vertical angulations and points of entry may be used.

Question 25

If the patient is seated in the correct position, the vertical angulation for a mandibular cross-sectional occlusal radiograph will most likely be set at 0 degrees.

Question 26

Specialized image receptor holders should be used for occlusal radiographs.

Question 27

A cross-sectional occlusal radiograph will significantly distort the image of the teeth, producing an image of the teeth that appear circular or elliptical.

Question 28

Topographical radiographs of the mandible are ideal at detecting the presence of salivary stones (sialoliths) in the ducts of the sublingual and submandibular glands.

Question 29

Correct points of entry position are determined by directing the central rays of the x-ray beam at the center of the image receptor.

Question 30

When imaging the maxillary arch, the white, unprinted side of the occlusal film packet will face the maxilla.

Question 31

A 16-inch (41-cm) PID should be used for the occlusal radiographic exam.

Question 32

Determining the vertical angulation for exposure of a cross-sectional occlusal radiograph is assisted by positioning the open end of the PID parallel to the external aiming device of the image receptor holder.

Question 33

An occlusal radiograph must be taken with the size #4 image receptor.

Question 34

The identification dot on an occlusal film should be placed toward the posterior to the oral cavity.

Question 35

If the image receptor is not placed in the mouth with at least 1/4 inch (1/2 cm) protruding outside, the result will be cone cutting.

Question 36

Occlusal radiographs can be placed and exposed in five regions of the oral cavity.

Question 37

When imaging the mandibular arch, the printed side of the occlusal film packet will face the mandible.

Question 38

The horizontal angulation for topographical occlusal radiographs is determined by directing the central rays at the image receptor perpendicularly through the teeth embrasures (spaces).

Question 39

The cross-sectional technique produces an occlusal radiograph that resembles a large periapical radiograph.

Question 40

If the patient is seated in the correct position, the recommended vertical angulation setting for a posterior mandibular topographical is 0 degrees.

Question 41

Do occlusal radiographs display dimensional distortion?

Question 42

How is the image receptor positioned to expose an occlusal radiograph?

Question 43

Can a thyroid collar be used during the occlusal radiographic exam?

Question 44

When placing an occlusal film packet intraorally, where should the embossed identification dot be positioned?

Question 45

List reasons for assessing a patient for occlusal radiographs.

Question 46

What is the purpose of the occlusal radiographic exam?

Question 47

Is a short or a long PID recommended for use in occlusal radiography?

Question 48

What type of image receptor holder is used for occlusal radiography?

Question 49

Is it acceptable to recline the chair or tip the headrest back to facilitate obtaining an occlusal radiograph?

Question 50

What are the recommended exposure settings for occlusal radiographs?