Chapter 21: Occlusal and Localization Techniques
Iannucci: Dental Radiography, 5th Edition
MULTIPLE CHOICE
1. The occlusal technique is used to examine
a.
interproximal areas.
b.
large areas of the upper or lower jaw.
c.
third molars.
d.
for bone loss.
2. In adults, size ____ receptor is used in the occlusal examination.
a.
0
b.
1
c.
2
d.
4
3. Which size receptor would you use to take an occlusal image on your 3-year-old patient?
a.
0
b.
1
c.
2
d.
4
4. How is the receptor stabilized in the patient’s mouth when taking a cross-sectional image?
a.
The receptor is placed in a Stabe bite-block.
b.
The receptor is held by a hemostat.
c.
The patient gently bites on the surface of the receptor.
d.
A bite-wing tab is attached to the receptor.
5. When using the occlusal technique, the receptor is positioned with the _______ side facing the
arch that is being exposed, and the receptor is placed in the mouth ______.
a.
tube; to the lingual of the teeth
b.
tube; between the occlusal surfaces of the maxillary and mandibular teeth
c.
colored or back; to the lingual of the teeth
d.
colored or back; between the occlusal surfaces of the maxillary and mandibular
teeth
6. Which of the following is a maxillary occlusal projection but not a mandibular occlusal
projection?
a.
Topographic occlusal projection
b.
Lateral occlusal projection
c.
Cross-sectional occlusal projection
d.
Pediatric projection
7. Which occlusal projection is used to examine the palate and the anterior teeth of the maxilla?
a.
Topographic occlusal projection
b.
Lateral occlusal projection
c.
Cross-sectional occlusal projection
d.
Pediatric projection
8. Which occlusal projection is used to locate foreign bodies or salivary stones in the region of
the floor of the mouth?
a.
Topographic occlusal projection
b.
Lateral occlusal projection
c.
Cross-sectional occlusal projection
d.
Pediatric projection
9. The pediatric projection is recommended for use in children ____ years old or younger.
a.
2
b.
5
c.
8
d.
10
10. For the maxillary topographic occlusal projection, the central ray is directed at ____ degrees.
a.
+30
b.
+45
c.
+65
d.
–30
11. The dental image is a _______-dimensional picture of a _______-dimensional object.
a.
two; two
b.
three; three
c.
two; three
d.
three; two
12. A dental image depicts which of the following dimensions of an object?
1. Length
2. Width
3. Depth
a.
1, 2, 3
b.
1, 2
c.
1, 3
d.
2, 3
13. The buccal object rule depends on a ________ image shift when trying to locate vertically
aligned images. With the buccal object rule, an object to the buccal of the reference object will
move in the ________ direction as the shift.
a.
vertical; same
b.
vertical; opposite
c.
horizontal; same
d.
horizontal; opposite
14. The “S” in the mnemonic SLOB stands for
a.
shift.
b.
similar.
c.
same.
d.
some.
15. According to the SLOB rule, when two dental images are compared, the object that lies to the
lingual appears to have moved in the same direction as the position-indicating device (PID),
and the object that lies to the buccal appears to have moved in the opposite direction as the
PID.
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.
16. When the right-angle technique is used, an occlusal receptor is exposed directing the central
ray at ____ degrees to the receptor.
a.
20
b.
45
c.
65
d.
90
17. You need to take a maxillary occlusal image on your 4-year-old patient. Which of the
following will you need to do?
a.
Place the tube side of the receptor facing down.
b.
Direct the PID through the canine-premolar contact.
c.
Place the top of the PID at the tip of the nose.
d.
Direct the PID at a +60-degree angle.
18. You need to take a mandibular occlusal image on your 28-year-old patient. Which of the
following will you need to do?
a.
Place the tube side of the receptor facing up.
b.
Use a size 4 receptor.
c.
Place the bottom of the PID at your patient’s chin.
d.
Direct the PID at a −35-degree angle.
19. Your patient indicates he was shot around tooth number 30 with a BB when he was younger.
The BB is still there. He would like it removed. You have been asked to take a dental image
of the area to locate the buccal-lingual and anterior-posterior position of the BB. Which of the
following would you take?
a.
Mandibular molar periapical and a second mandibular molar periapical with the
horizontal angulation changed
b.
Mandibular cross-sectional image
c.
Mandibular molar periapical image
d.
Mandibular occlusal image
20. Your 17-year-old patient has tooth number 6 impacted. Which of the following would you
take to evaluate the tooth?
a.
Maxillary pediatric occlusal
b.
Mandibular cross-sectional
c.
Maxillary lateral occlusal
d.
Maxillary occlusal
