Chapter 12 Flashcards
Which of the following is not an intraoral radiograph?
C
A) Intraoral radiography consists of methods of exposing an image receptor placed inside the oral cavity. Bitewing, periapical, and occlusal examinations all involve the exposure of image receptors placed in the mouth, whereas the panoramic examination uses a receptor placed outside the mouth.
Which of the following is not a shadow-casting principle?
A
The smallest focal spot of radiation should be selected.
Each of the following statements regarding the fundamentals of periapical radiographs is correct except one. Which one is the exception?
C
Using the patient’s finger to hold the image receptor in place during exposure is not acceptable.
An 18-image full mouth survey includes
D
An 18-image full mouth survey of radiographs includes 14 periapical and 4 bitewing radiographs.
Which of the following statements is false?
A
A size 4 image receptor is used for occlusal radiographs.
Which of the following statements regarding orientation of a film packet is false?
B
The identification dot is used to differentiate the right from the left side of the patient.
Which of these statements is false?
A
Incorrect horizontal angulation results in overlapped contact points.
Which of these statements is false?
B
Both the paralleling and the bisecting techniques require correct vertical angulation to produce diagnostic-quality radiographs.
Each of the following statements regarding the point of entry is correct except one. Which one is the exception?
C
The open end of the PID should be placed as close to the patient’s skin as possible, without touching.
Which of the following statements is false?
B
Vertical angulation is accomplished by directing the central ray perpendicular to the image receptor in the paralleling technique.
Which of the following statements is correct?
D
Vertical angulation is described in degrees, with the vertical angulation of the tube head and PID beginning at zero.
Which of these statements is false?
A
The fundamental purpose of the bitewing exam is to show the coronal portions of the teeth and alveolar crests.
Which of these statements is false?
B
The paralleling technique arose through application of the rule of isometry.
What do periapical radiographs show?
They show the coronal portions of the teeth and alveolar crests of a segment of both the mandible and maxilla on one film.
What is the primary purpose of a periapical radiograph?
It is designed to image the apices of teeth and surrounding bone.
Which statement is false regarding intraoral radiography techniques?
B) The paralleling technique arose through application of the rule of isometry.
What are the two basic techniques employed in intraoral radiography?
The two basic techniques are bisecting and paralleling.
Can the paralleling and bisecting techniques be modified?
Yes, both techniques can be modified to meet special conditions.
Which technique is newer, paralleling or bisecting?
The paralleling technique is newer than the bisecting technique.
