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26 Cards in this Set
- Front
- Back
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Each of the following is an indication for exposing occlusal radiographs EXCEPT one. Which one is the EXCEPTION?
a. Evaluate periodontal disease b. Examine sinus borders c. Locate foreign bodies d. Reveal sialoliths |
a. Evaluate periodontal disease
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Which of the following will a mandibular cross-sectional occlusal radiograph best image?
a. Cleft palate b. Fractured jaw c. Large periapical cyst d. Sublingual swelling |
d. Sublingual swelling
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Which of these sizes is known as the occlusal image receptor?
a. #1 b. #2 c. #3 d. #4 |
d. #4
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The image receptor should be placed with the long dimension along the midline (front to back) for which of these occlusal radiographs?
a. Maxillary topographical anterior b. Maxillary topographical posterior c. Mandibular topographical anterior d. Mandibular cross-sectional |
b. Maxillary topographical posterior
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Where should the embossed dot be positioned when placing an occlusal film packet intraorally?
a. Toward the apical b. Toward the occlusal c. Toward the anterior d. Toward the posterior |
c. Toward the anterior
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The ideal patient head position when exposing a maxillary topographical occlusal radiograph is to position the occlusal plane _______________ to the plane of the floor and the midsaggital plane _______________ to the plane of the floor.
a. parallel; perpendicular b. perpendicular; parallel c. parallel; parallel d. perpendicular; perpendicular |
a. parallel; perpendicular
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The ideal patient head position when exposing a mandibular cross-sectional occlusal radiograph is to position the head rest so that the chin is tipped _______________ and the occlusal plane is _______________ to the plane of the floor.
a. down; perpendicular b. up; perpendicular c. down; parallel d. up; parallel |
b. up; perpendicular
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Assuming that the patient’s head is in the correct position, which of the following is the correct vertical angulation setting for a maxillary anterior topographical occlusal radiograph?
a. +65 degrees b. +45 degrees c. 0 degrees d. -55 degrees |
a. +65 degrees
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Assuming that the patient’s head is in the correct position, which of the following is the correct vertical angulation setting for a mandibular cross-sectional occlusal radiograph?
a. +65 degrees b. +45 degrees c. 0 degrees d. -55 degrees |
c. 0 degrees
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What is the point of entry for correctly exposing a posterior mandible topographical occlusal radiograph?
a. The middle of the chin b. A point 2 in. (5 cm) back from the tip of the chin c. A point on the ala-tragus line below the outer cantus of the eye d. A point on the inferior border of the mandible directly below the second mandibular premolar |
d. A point on the inferior border of the mandible directly below the second mandibular premolar
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To help avoid molar overlap, the radiographer should place the image receptor
a. parallel to the buccal surfaces of the molars. b. perpendicular to the buccal surfaces of the molars. c. parallel to the molar embrasures. d. perpendicular to the molar embrasures. |
d. perpendicular to the molar embrasures.
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To minimize canine-premolar overlap, the radiographer should direct the x-ray beam toward the image receptor slightly obliquely from the
a. mesial. b. distal. c. occlusal. d. apical. |
b. distal.
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To compensate for a shallow palatal vault, the vertical angulation may be adjusted to
a. increase by up to15 degrees. b. decrease by up to 15 degrees. c. increase by up to 25 degrees. d. decrease by up to 25 degrees. |
a. increase by up to15 degrees.
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Which area of the oral cavity would require the highest exposure setting?
a. Maxillary anterior region b. Maxillary posterior region c. Mandibular anterior region d. Mandibular posterior region |
b. Maxillary posterior region
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The presence of a large mandibular torus may make which of these difficult?
a. Aligning the correct horizontal angulation b. Determining the accurate vertical angulation c. Placing the image receptor precisely d. Directing the central ray of the x-ray beam at the center of the image receptor |
c. Placing the image receptor precisely
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The best image receptor placement for a patient with a torus palatinus is
a. between the torus and the tongue. b. on the top of the torus. c. near the front of the torus. d. behind the torus. |
d. behind the torus.
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The paralleling technique is the best technique for imaging edentulous areas. The bisecting technique is the best technique when imaging endodontic treatment.
a. The first statement is true. The second statement is false. b. The first statement is false. The second statement is true. c. Both statements are true. d. Both statements are false. |
a. The first statement is true. The second statement is false.
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Which of the following radiographs would be the least beneficial for the totally edentulous patient?
a. Bitewing b. Periapical c. Panoramic d. Occlusal |
a. Bitewing
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The exposure setting for edentulous regions should be decreased from the exposure time for the same region
with teeth by a. one-half. b. one-third. c. one-fourth. d. one-fifth. |
d. one-fifth.
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Which of the following would be the BEST image receptor holder for exposing working radiographs during
a root canal procedure? a. Rinn XCP b. Rinn Snap-A-Ray c. Commercially made endodontic holder d. Polystyrene block |
c. Commercially made endodontic holder
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Localization adds which of the following dimensions to two-dimensional radiographs?
a. Anterior-posterior b. Buccal-lingual c. Mesial-distal d. Inferior-superior |
b. Buccal-lingual
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Which of the following methods of localization utilizes a cross-sectional occlusal radiograph?
a. Definitive method b. Right-angle method c. Tube shift method d. Buccal-object rule |
b. Right-angle method
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If the tube shifts to the mesial and the object in question shifts to the distal, the object is located on the lingual. This is an example of the definitive method of localization.
a. The first statement is true. The second statement is false. b. The first statement is false. The second statement is true. c. Both statements are true. d. Both statements are false. |
d. Both statements are false.
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When exposing a disto-oblique periapical radiograph of the maxilla, which of the following changes should be made to the standard periapical radiograph?
a. 5-degree shift in the vertical angulation b. 10-degree shift in the horizontal angulation c. An increase in the time/implulse setting d. All of the above |
d. All of the above
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To project an impacted mandibular third molar anteriorly onto the image receptor, a mandibular disto-oblique periapical radiograph requires a
a. 5-degree shift in the vertical angulation. b. 10-degree shift in the horizontal angulation. c. An increase in the time/implulse setting. d. All of the above. |
b. 10-degree shift in the horizontal angulation.
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List four reasons to duplicate radiographs.
a. ______________ b. ______________ c. ______________ d. ______________ |
● When providing copies for third-party payment (insurance companies)
● When refering the patient to a specialist ● When the patient changes dentists or moves ● For consultations with other professionals ● For publications in professional journals ● For use in professional study clubs ● To accompany biopsies of pathological conditions ● For evidence in legal cases |
