Ch 19 Graded Homework Name: Christopher Torres
Date: 7/18/2022
Paralleling Technique
1.Parallel is defined as
A. cutting across or through
B. intersecting at or forming a right angle
C. moving or lying in the same plane, always separated by the same distance and not intersecting
D. an angle of 90 degrees formed by two lines perpendicular to each other
2. According to the basic principles of the paralleling technique, the receptor is placed in the mouth
_____ to the long axis of the tooth being x-rayed, and the central ray of the x-ray beam is directed
______ to the receptor and long axis of the tooth.
A. parallel; perpendicular
B. parallel; parallel
C. perpendicular; parallel
D. perpendicular; perpendicular
3. To achieve parallelism between the receptor and the tooth, the _______ distance must be increased
to keep the receptor parallel with the long axis of the tooth.
A. target-object
B. object- receptor
C. target- receptor
D. operator- patient
4. Image magnification occurs when the ______ distance is increased.
A. target-object
B. object- receptor
C. target- receptor
D. operator- patient
5. Image magnification can be decreased when the _______ is increased.
A. target-object
B. object- receptor
C. target- receptor
D. operator- patient
6. Which of the following is a disposable receptor holder designed for one-time use only?
A. Rinn XCP instruments
B. Precision receptor holders
C. Stabe bite-block
D. Snap-a-ray receptor holder
7. Reusable receptor holders must be ________ after each use.
A. rinsed with tap water
B. wiped with disinfectant
C. placed in an immersion disinfectant
D. sterilized
8. Which of the following receptor holders include aiming rings that aid in the alignment of the positionindicating device (PID) with the receptor?
A. Hemostat with bite-block
B. Stabe bite- block
C. Snap-a-ray receptor holder
D. Rinn XCP instruments
9. The authors recommend using a size ____ receptor for anterior teeth and a size ____ receptor for
posterior teeth.
A. 1:1
B. 2:2
C. 1:2
D. 2:1
10. (1) The dental radiographer should be careful not to stimulate the patient’s gag reflex. (2) Once the
gag reflex is stimulated, the patient may gag on receptors that could normally be tolerated.
A. Both statements are true
B. Both statements are false
C. The first statement is true; the second statement is false
D. The first statement is false; the second statement is true
11. If you are using size 1 receptors, how many exposures will you need to take of the anterior teeth?
A. Four
B. Six
C. Seven
D. Eight
12. If you are using size 2 receptors, how many exposures will you need to take of the anterior teeth?
A. Four
B. Six
C. Seven
D. Eight
13. If you are taking an anterior image sequence, which tooth do the authors recommend you begin
with?
A. 6
B. 8
C. 9
D. 11
14. How many exposures of the posterior teeth will you need to take when using the paralleling
technique?
A. Four
B. Six
C. Seven
D. Eight
15. Which posterior quadrant would be the best for you to begin with when using the paralleling
technique?
A. Maxillary left quadrant
B. Maxillary right quadrant
C. Mandibular left quadrant
D. Mandibular right quadrant
16. Which posterior quadrant should you move to next (second) when using the paralleling technique?
A. Maxillary left quadrant
B. Maxillary right quadrant
C. Mandibular left quadrant
D. Mandibular right quadrant
17. Your patient has a shallow palate; you should modify your technique when there is a lack of
parallelism _____.
A. greater than 10 degrees
B. greater than 20 degrees
C. greater than 30 degrees
D. less than 30 degrees
18. (1) When taking maxillary periapical images on a patient with a shallow palate, there is only one
technique that can be used to compensate for lack of parallelism. (2) To compensate for a lack of
parallelism, the vertical angulation can be increased by 5 to 15 degrees more than the XCP instrument
indicates.
A. Both statements are true
B. Both statements are false
C. The first statement is true; the second statement is false
D. The first statement is false; the second statement is true
19. Your patient has a palatal torus, where should you place the receptor?
A. You cannot take a periapical, the patient will require a panoramic receptor
B. Place the receptor on the torus
C. Place the receptor in front of the torus next to the teeth you are exposing
D. Place the receptor on the far side of the torus
20. When placing the receptor in a mandibular premolar region, the receptor must be placed _____ the
tongue. When inserting the receptor holder into the mouth, the receptor is tipped ______ the tongue.
A. over; toward
B. over; away from
C. under; toward
D. under; away from
21. When using film, the dot should always be placed _______ in relation to the bite-block.
A. down
B. up
C. distal
D. in the slot
22. The lingual cusp of the first premolar usually obscures the distal contact of the canine on the _____
exposure.
A. maxillary canine
B. maxillary incisor
C. mandibular canine
D. mandibular incisor
23. Which of the following images must include crowns, roots, and surrounding bone, sinus, and
tuberosity region of the first, second, ad third molars?
A. maxillary premolar
B. maxillary molar
C. mandibular premolar
D. mandibular molar
24. Which of the Rinn beam alignment device includes one ring and one arm that can be used for
anterior posterior, and bite-wing receptor positioning?
A. Rinn XCP Extension Cone Paralleling System
B. Rinn XCP-ORA System
C. Rinn SCP-DS DIT Universal Sensor Holder
D. Rinn Flip- Ray System
25. Which basic rule of paralleling states that the receptor must be parallel to the long axis of the tooth?
A. Receptor placement
B. Receptor position
C. Vertical angulation
D. Receptor exposure
26. Which basic rule of paralleling indicates that the central ray should be directed through the contact
area of the teeth?
A. Receptor placement
B. Vertical angulation
C. Horizontal angulation
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