Das 135: Intraoral And Extraoral Imaging(chpt.39,40,41,42)

114 Questions  I  By Maurita on January 9, 2013
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1.  Number 2 film is commonly used for adult bitewing radiographs.
A.
B.
2.  Bitewing radiographs are used to show interproximal caries, early periodontal disease, and recurrent decay under restorations.
A.
B.
3.  The bisecting technique is preferred because it provides a more accurate image of the teeth.
A.
B.
4.  A periapical radiograph pictures the entire tooth and surrounding areas.
A.
B.
5.  Occlusal radiographs are used to locate retained roots, supernumerary teeth, salivary stones, and fractures.
A.
B.
6.  It is acceptable for the dental assistant to hold a film in the patient's mouth if they are unable to do so.
A.
B.
7.  Radiographs on edentulous patients are not necessary.
A.
B.
8.  A panoramic radiograph will allow the dentist to view the entire dentition and related structures on one film.
A.
B.
9.  A panoramic radiograph does not need any specialized equipment.
A.
B.
10.  A patient must remove earrings and eye glasses prior to having a panoramic radiograph taken.
A.
B.
11.  If the patient is in a wheelchair, doesn’t have use of his or her upper limbs, and a film sensor holder cannot be used to stabilize the film sensor, you should do which of the following?     
A.
B.
C.
D.
12.  According to the guidelines for film placement, which of the following is true?     
A.
B.
C.
D.
13.  The alignment of the x-ray beam in the horizontal and vertical planes formed by the long axis of the teeth and the film sensor placement is referred to as:
A.
B.
C.
D.
14.  The bisecting-angle instrument (BAI) uses _____ to determine the correct PID angulation.
A.
B.
C.
D.
15.  When using an x-ray sensor, it is important to always:
A.
B.
C.
D.
16.  In adults, a size #_____ intraoral film is used for the occlusal technique.
A.
B.
C.
D.
17.  Horizontal angulation is:
A.
B.
C.
D.
18.  Incorrect horizontal angulation of the PID results in:
A.
B.
C.
D.
19.  The American Academy of Oral and Maxillofacial Radiology recommends using the paralleling technique because:
A.
B.
C.
D.
20.  The exposure sequence for the posterior teeth should begin with the _____ view.
A.
B.
C.
D.
21.  The number of bitewing films needed is based on the curvature of the arch and the:
A.
B.
C.
D.
22.  The _____ technique is recommended by the American Academy of Oral and Maxillofacial Radiology and the American Association of Dental Schools, because it provides the most accurate image with the least amount of radiation exposure to the patient.
A.
B.
C.
D.
23.  Angulation of the PID is critical to ensure that the central ray is perpendicular to the bisector line in which of the following techniques?
A.
B.
C.
D.
24.  When using a #2 film sensor for anterior views using the paralleling technique, there are _____ anterior images.
A.
B.
C.
D.
25.  When taking periapical x-rays, the patient's head is _____ for maxillary films and _____ for the mandibular arch.
A.
B.
C.
D.
26.  The bitewing view shows the:
A.
B.
C.
D.
27.  What size film sensor is used for the anterior region of the mouth?
A.
B.
C.
D.
28.  Factors that can affect the quality of dental radiographs include:
A.
B.
C.
D.
29.  Periapical x-rays are essential in which dental specialty?
A.
B.
C.
D.
30.  When using a size #1 film sensor for anterior images using the paralleling technique, _____ maxillary and _____ mandibular images are exposed.
A.
B.
C.
D.
31.  When taking periapical images, it is best to start with anterior images because:
A.
B.
C.
D.
32.  When mounting x-rays, it is important to:
A.
B.
C.
D.
33.  To correct an elongated image on an x-ray view, the vertical angulation needs to be:
A.
B.
C.
D.
34.  The _____ technique may be used in some situations such as a small mouth, shallow palate, or the presence of tori.
A.
B.
C.
D.
35.  The number of x-ray views that makes a patient's full-mouth series depends on:
A.
B.
C.
D.
36.  The major difference between the paralleling technique and the bisecting technique is film sensor:
A.
B.
C.
D.
37.  The bitewing view is used for detecting:
A.
B.
C.
D.
38.  The bisecting technique is used:
A.
B.
C.
D.
39.  The American Dental Association recommends that films be mounted:
A.
B.
C.
D.
40.  Radiographic images on an edentulous patient might be required for:
A.
B.
C.
D.
41.  In order to minimize image distortion, the:
A.
B.
C.
D.
42.  If the size #2 film sensor is being used, the anterior films are in the ______ position and the posterior films/sensors are in the ______ position.
A.
B.
C.
D.
43.  For management of the patient with a gag reflex:
A.
B.
C.
D.
44.  A periapical view shows the tooth from the occlusal surface or incisal edge to the:
A.
B.
C.
D.
45.  An intraoral full-mouth survey (FMX) on an adult consists of _____ images.
A.
B.
C.
D.
46.  A ghost image will appear _____ than normal and on the _____ side of the image.     
A.
B.
C.
D.
47.  The CBCT is useful in helping the dentist:     
A.
B.
C.
D.
48.  The main components of the panoramic unit include ________, and exposure controls.     
A.
B.
C.
D.
49.  The quality of the panoramic view depends on:     
A.
B.
C.
D.
50.  The ______ used in the panoramic x-ray machine tubehead is a lead plate with an opening shaped like a narrow vertical slit.     
A.
B.
C.
D.
51.  What new feature of the panoramic unit has allowed better resolution to show better details?     
A.
B.
C.
D.
52.  Advantages of panoramic imaging, when contrasted with intraoral imaging, include:     
A.
B.
C.
D.
53.  Each panoramic unit has a(n) ______ that is used to align the patient’s teeth as accurately as possible.
A.
B.
C.
D.
54.  If the patient’s chin is positioned too low during the panoramic exposure:     
A.
B.
C.
D.
55.  Computed tomography:     
A.
B.
C.
D.
56.  Skull radiography is most often used in:     
A.
B.
C.
D.
57.  The cause of a panoramic image that comes out with a radiopaque cone-shaped artifact that interferes with the diagnostic information is the:     
A.
B.
C.
D.
58.  A patient wearing earrings or glasses must remove them before a panoramic x-ray image exposure; otherwise, a _____ will appear on the image.     
A.
B.
C.
D.
59.  How can a lead apron artifact be avoided during exposure of panoramic images?     
A.
B.
C.
D.
60.  If the patient’s teeth are not positioned in the groove of the bite-block, the teeth will appear:     
A.
B.
C.
D.
61.  If the patient’s chin is too high during the panoramic exposure:     
A.
B.
C.
D.
62.  In panoramic imaging, ________ around the patient.     
A.
B.
C.
D.
63.  The exposure controls allow the _____ to be adjusted on the panoramic x-ray unit, to accommodate patients of different sizes.     
A.
B.
C.
D.
64.  The lead plate in the panoramic tubehead with an opening shaped like a narrow vertical slit is the:     
A.
B.
C.
D.
65.  Which is not true of the cone beam computed tomography (CBCT)?     
A.
B.
C.
D.
66.  Which statement is not true of the panoramic tubehead?     
A.
B.
C.
D.
67.  Which statement is true of a grid?     
A.
B.
C.
D.
68.  Which statement is not true concerning panoramic imaging?     
A.
B.
C.
D.
69.  A dark radiolucent shadow that obscures the anterior teeth can indicate that the patient’s:
A.
B.
C.
D.
70.  If a dark radiolucent shadow obscures the apices of the maxillary teeth, the:
A.
B.
C.
D.
71.  Which of these is not an intraoral view?
A.
B.
C.
D.
72.  What term describes the imaginary line between the long axis of the tooth and the film plane?
A.
B.
C.
D.
73.  A focal spot distance of __________ is advocated in the paralleling technique of intraoral radiography.
A.
B.
C.
D.
74.  How many standard-sized films are recommended to make a full bitewing survey of the posterior teeth?
A.
B.
C.
D.
75.  Which of these factors is most likely to reduce the usefulness of an interproximal radiograph?
A.
B.
C.
D.
76.  What is the approximate vertical angulation for most bitewing radiographic procedures?
A.
B.
C.
D.
77.  In which of these situations is an occlusal survey not indicated?
A.
B.
C.
D.
78.  Which film size is usually required for f full mouth series on a six-year-old patient?
A.
B.
C.
D.
79.  Which of these conditions is most commonly found during a radiographic survey of edentulous ridges?
A.
B.
C.
D.
80.  Which statement is true of occlusal radiographs?
A.
B.
C.
D.
81.  Which of the following are advantages of using a long position indicator device (PID)?
A.
B.
C.
D.
E.
82.  The factor that would most likely be increased when taking radiographs on larger than average patients is:
A.
B.
C.
D.
E.
83.  When choosing the time for radiographic exposure, which of the following should be taken into consideration?
A.
B.
C.
D.
E.
84.  Which selection below correctly describes the image distortion produced when the patient's midsagittal plane is not centered?
A.
B.
C.
D.
85.  Which of the following selections is NOT an accurate description of the focal trough?
A.
B.
C.
D.
86.  Rough handling of the film cassette during panoramic film unloading and reloading will produce which of the following artifacts?
A.
B.
C.
D.
87.  When the patient's head is positioned too far backward, the clinician will observe all of the following manifestations except one. Which one is the exception?
A.
B.
C.
D.
88.  Which of the following phrases is NOT consistent with production of panoramic ghost images?
A.
B.
C.
D.
89.  What error would cause the production of a wedge-shaped radiopaque artifact near the midline in panoramic radiography?
A.
B.
C.
D.
90.  Which of the following is NOT an accurate description of intensifying screens?
A.
B.
C.
D.
91.  When determining ideal panoramic film density, which of the following is the best region to examine to assess adequate density?
A.
B.
C.
D.
92.  Which of the following selections is NOT correct about panoramic radiography?
A.
B.
C.
D.
93.  Panoramic radiographs are recommended in all of the following clinical situations except:
A.
B.
C.
D.
94.  Incorrect vertical angulation can result in an image that is:
A.
B.
C.
D.
95.  The bitewing view shows the:
A.
B.
C.
D.
96.  Which flim holder can aid in positioning the film during an endodontic procedure, because it fits around the dam clamp and the endodontic instruments ?
A.
B.
C.
D.
97.  With the paralleling technique, usually there are ___ posterior film posterior film sensor images taken.
A.
B.
C.
D.
98.  Which teeth are included in the anterior set of images?
A.
B.
C.
D.
99.  When taking radiographs using film, the white side of the film is always placed:
A.
B.
C.
D.