Dental Assisting— Radiology Ch. 39, 40, 41, 42 FINAL EXAM
43. What size film sensor is used for the anterior region of the mouth?
#1, #2 (BOTH A and B)
2. The most commonly used film size for adult intraoral dentistry is size:
#2
27. It is the responsibility of the ________________________ to discuss the need for dental imaging.
Dentist
16. When developer solution in an automatic processor is warmer than 83'F, the processed film will appear:
Dark or black
84. A panoramic image allows the dentist to:
Detect caries, view the entire dentition and related structures in one film (BOTH A and B)
98. When the patients jaws are outside the focal trough, the resulting images are:
Distorted
63. Periapical radiographs are essential in which dental specialty?
Endodontics, Oral Surgery (BOTH B and C)
87. Each panoramic unit has a(n) __________________ that is used to align the patients teeth as accurately as possible.
Head position
6. Developer cutoff will result in a ____________________ border.
Straight white
75. When taking periapical x-rays, the patient's head is _________________________ for maxillary films and _______________________ for the mandibular arch.
Upright, tilted back slightly
99. The main components of the panoramic unit include exposure controls and the:
X-ray tubehead, head positioner
1. Dental film holder, used to position and hold the dental x-ray films in the patient's mouth, include:
XCP and disposable block, EeZee-Grip and Endo Ray (BOTH B and C)
105. When a patients chin is too high during the panoramic exposure:
A " reverse smile line" will appear on the radiograph
71. 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:
Angulation
29. Who can be held legally responsible for a dental assistant's actions?
Both the dentist and assistant
85. In panoramic imaging, __________________ rotate(s) around the patient.
Both the film/sensor and the tube head
68. An anterior set of images includes:
Canines and incisors
14. When a film passes through fixer solutions before developing, the film will appear:
Clear
102. The part of the unit that aligns the patients teeth as accurately as possible is the:
Head positioner
74. To correct an elongated image on an x-ray view, the vertical angulation needs to be:
Increased
82. When mounting radiographs, it is important to:
Know the anatomy of the maxilla and mandible, mount the films in the order of the teeth, label the mount with the patients name and date before mounting the films (ALL OF THE ABOVE)
12. Solutions should have been changed in the processor 1 week ago. Continuing to use exhausted developer will result in _________________ films.
Light
103. A dark radiolucent shadow that obscures the anterior teeth can indicate that the patients:
Lips were not closed on the bite-block during the exposure
19. An extraoral dental x-ray film is:
More sensitive to light than intraoral film
78. The number of bitewing films needed is based on the curvature of the arch and the:
Number of teeth present in the posterior areas
52. Incorrect horizontal angulation of the PID results in:
Overlapped contact areas
104. When a dark radiolucent shadow obscures the spices of the maxillary teeth, the:
Patients tongue was not in contact with the palate during the exposure
81. When using an x-ray sensor, it is important to always:
Place the sensor parallel to the incisal or occlusal edge of the teeth
70. The major difference between the paralleling technique and the bisecting technique is film sensor:
Placement
7. All the following are true statements about image plates except they:
Should be autoclaved
107. When a patients teeth are not positioned in the groove of the bite black, the teeth will appear:
Skinny
108. When a patient does not stand or sit with a straight spine:
The cervical spine will appear as a radio parity in the center of the film, obscuring the diagnostic information
94. Advantages of panoramic imaging include which of the following?
The entire maxilla and mandible are seen on one image, it is easy and quick to learn how to expose a panoramic image, patients prefer panoramic images and are exposed to less radiation (ALL OF THE ABOVE)
106. When a patients chin is positioned too low during the panoramic exposure:
The mandibular incisors will appear blurred, the condyles will not be visible ( BOTH A and B)
109. Which of the following is not true of a panoramic tubehead?
The vertical angulation is adjustable
80. When taking radiographs using films, the white side of the film sensor should be placed:
Toward the teeth
101. All of the following statements about the panoramic tubehead are true except the:
Tubehead rotates the film behind the patients head
23. Quality assurance is a way of ensuring that everything possible is being done to produce high-quality diagnostic images and includes quality:
Administration procedures, control tests (BOTH A and C)
36. Sterilized positioning instruments should be removed from the packages:
After the patient is seated
60. The American Dental Association recommends that films be mounted:
According to the labial mounting method
47. The dental assistant exposing a periapical film sensor using the paralleling technique should always start with the:
Anterior teeth
41. A periapical view shows the tooth from the occlusal surface or incisal edge to the:
Approximately 2 to 3 mm beyond the apex
8. Positioning instruments in digital radiography:
Assist in film placement, keep the patients fingers from being exposed (BOTH A and B)
35. All the following are true statements regarding the preparation of the operators for dental imaging except:
Barriers do not need to be used because spatter of blood and saliva is unlikely
45.which technique can be used in situations such as a small mouth, shallow palate, or the presence of tori?
Bisecting technique
51. Angulation of the PID is critical to ensure that the central ray is perpendicular to the bisector line in which of the following techniques?
Bisecting, bitewing (BOTH B and C)
46. To minimize image distortion, the:
Film must be positioned parallel to the long axis of the tooth
77. Basic principles of the bitewing technique include the:
Film sensor is placed parallel to the crowns of the teeth
62. Factors that can affect the quality of dental radiographs include:
Film sensor placement, exposure, processing (ALL OF THE ABOVE)
5. ________________ hardens the film emulsion during film processing.
Fixing
48. When using a size #1 film sensor for anterior images using the paralleling technique, ________________________ maxillary and __________________________ mandibular images are exposed.
Four, three
32. Once films are removed from the mouth, they are considered contaminated and should be:
Handled only with gloved hands
97. The quality of the panoramic view depends on:
How the patients jaw is positioned within the focal trough, the size of the patients jaw, how closely the patients jaw conforms to the focal trough (ALL OF THE ABOVE)
56. Radiographic images on an edentulous patient might be required for:
Identifying objects embedded in the bone, detecting retained root tips, impacted teeth, and lesions (BOTH Band C)
4. The device that intensifies or increases the effect of the radiation and decreases the amount of exposure time needed when exposing an extraoral radiograph is a(n):
Intensifying screen
10. All the following are true statements about the emulsion on a duplicating film except that it:
Is exposed by light
90. A ghost image will appear ___________________ than normal and on the ____________________ side of the image.
Larger, opposite
95. Advantages of panoramic imaging, when contrasted with intraoral imaging, include:
Less radiation exposure
58. For the patient with a hypersensitive gag reflex, the teeth that should be exposed last are:
Maxillary molars
50. The exposure sequence for the posterior teeth should begin with the _____________________ right _______________________ view.
Maxillary, premolar
88. The exposure controls allow the ____________________ to be adjusted on the panoramic x-ray unit, to accommodate patients of different sizes.
Milliamperage and kilovoltage
30. Dental records must contain documentation of the _____________________ of dental images taken.
Number, type, quality (ALL OF THE ABOVE
79. When taking a premolar bitewing image, the anterior edge of the film sensor should be placed:
On the distal half of the canine
3. The extraoral film placed outside the mouth during x-ray exposure is:
Panoramic
92. The correct position of the Frankfort plane for a diagnostically correct panoramic image is:
Parallel to the floor
44. The technique is recommended by the American Academy of Oral and Maxillofacial Radiography and the American Association of Dental Schools, because it provides the most accurate image with the least amount of radiation exposure to the patient is the ____________________ technique:
Paralleling
66. When taking periapical images, it is best to start with anterior images because:
Patients are less likely to gag with anterior film sensor placement, patients can tolerate the film sensor size easier (BOTH B and C)
59. A radiographic mount should always be labeled with the:
Patients name and the date the images were exposed
93. Anterior teeth that appear fat are caused by the:
Patients teeth positioned too far back on bite block
40. The bitewing view is used for detecting:
Periodontal disease, interproximal decay (BOTH B and C)
65. In the paralleling technique, the central ray of the x-ray beam must be _____________________ to the film sensor and the long axis of the tooth.
Perpendicular
13. The life of the processing solutions is affected by:
The number of films processed, the time elapsed since last change, the size of films processed (ALL OF THE ABOVE)
72. Horizontal angulation is:
The side-to-side angulation
42. An intraoral full-mouth survey on an adult consists of _______________ images.
18 to 20
25. For a film to be properly processed, it should be left in a fixer solution, at full strength, for:
2 minutes
67. What is the usual number of posterior film sensor images taken in the parallel technique?
8
17. The ideal time and temperature for manual developing is:
5 minutes at 68`F
89. A patient wearing earrings or glasses must remove them before a panoramic x-ray image exposure otherwise, a ________________ will appear on the image.
Blurred area and a ghost image
34. Quality control for the darkroom should include:
Checking for light leaks every six months, safelight testing, equipment testing (ALL OF THE ABOVE)
24. According to the test for x-ray film freshness, the film is fresh and has been properly stored and handled when the recessed film appears:
Clean with a slight blue tint
100. The lead plate in the panoramic tubehead with an opening shaped like a narrow vertical slit is the:
Collimator
86. The __________________ used in the panoramic x-ray machine tubehead is a lead plate with an opening shaped like a narrow vertical slit.
Collimator
55. The bitewing view shows the:
Crowns and interproximal areas of the maxillary and mandibular teeth, crystal bone (BOTH A and C)
11. The correct order of steps in manual film processing is:
Develop, rinse, fix, wash
15. One reason for a lighter than normal radiograph is the:
Developer solution is too weak
73. Vertical angulation:
Differs according to the technique being used, refers to the up-and -down plane, can be determined in degrees marked on the outside of the tube head (ALL OF THE ABOVE)
22. What should the dental assistant do if a patient refuses dental imaging?
Document in the patients record the fact that he or she refused recommended dental imaging, explain to the patient the importance of dental imaging (BOTH A and B)
53. Incorrect vertical angulation can result in an image that is:
Elongated, foreshortened (BOTH A and B)
57. Which film holder can aid in positioning the film during an endodontic procedure, because it fits around the dam clamp and the endodontic instruments?
EndoRay
38. An administrative quality control plan:
Ensures that each individual is trained to perform assigned duties, maintains a written description of the quality insurance plan, maintains records of control tests (ALL OF THE ABOVE)
37. Given normal use, processing solutions should be changed:
Every 3 to 4 weeks
21. The Consumer Patient Radiation Health and Safety Act is a federal law that requires all:
Person who use x-rays to take dental images to be properly trained/certified (BOTH A and B)
18. When loading the film into the cassette before exposure (in extraoral radiography), the:
Procedure must be done in the darkroom
31. The simplest method for ensuring the freshness of each box of film is to:
Process one film from each box with fresh chemicals
28. Which of the following must be disclosed to the patient before obtaining informed consent for dental radiographs?
Risks and benefits of the images, person who will be exposing, consequences of not having images (ALL OF THE ABOVE)
33. All the following statements are true regarding the care of intensifying screens except:
Screens should be cleaned with a commercial cleaner after each use
20. Digital radiography requires less radiation than traditional radiography because the:
Sensor is more sensitive to x-ray energy
49. When using a #2 film sensor for anterior views using the paralleling technique, the number of anterior images taken is:
Six
64. The number of x-ray views that makes a patient's full-mouth series depends on:
The dentists preference, the number of the teeth present in a patients mouth, whether the paralleling of the bisecting technique is used (ALL OF THE ABOVE)
96. All of the following statements about panoramic imaging are true except:
The digital panoramic unit uses film that has to be processed.
83. Each of the following statements is true about taking radiographs using the paralleling technique except:
The film sensor must be placed directly against the teeth being exposed
54. According to the guidelines for film placement, which of the following is true?
The identification dot on the film is always placed in the slot of the film holder
9. When placing a dental film in the patient's mouth, the white side is placed _____________________ the tube and the raised dot to the _________________.
Toward, occlusal or incisal
91. To avoid a lead apron artifact on a panoramic radiograpgh:
Use a lead apron without a thyroid collar, place the lead apron low around the neck of the patient so that it does not block the x-ray beam
61. One technique for the management of the patient with a ga reflex is to:
Use extraoral images
26. Regulations regarding certification for dental assistants in radiography:
Vary from state to state
76. When a size #2 film sensor is used, the anterior films are in the _______________________ position and the posterior films/sensors are in the ____________________ position.
Vertical, horizontal
39. When a daily radiography is lighter than the reference radiograph, it indicates the developer is too:
Weak
69. One reason the bisecting technique is used is:
When patients have small mouths or low palatal vaults
