Dental Radiography principals and Techniques 5th edition by Joen Iannucci
Dental Radiography principals and Techniques 5th edition by Joen Iannucci
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Chapter 22: Panoramic Imaging
Complete Chapter Questions With Answers
Sample Questions Are Posted Below
MULTIPLE CHOICE
| a. | 1, 2, 3 |
| b. | 1, 2 |
| c. | 1, 3 |
| d. | 2, 3 |
ANS: A
Advantages of panoramic receptors over intraoral periapical receptors include visualization of impacted third molar teeth, jaw fractures, and large lesions in the posterior mandible.
DIF: Comprehension REF: Page 244 OBJ: 2
TOP: CDA, RHS, I.B.1.c.ii. Describe appropriate technique for exposing panoramic radiography
MSC: NBDHE, 2.3 Technique
| a. | a series of; intraoral |
| b. | a series of; extraoral |
| c. | a single; intraoral |
| d. | a single; extraoral |
ANS: D
A panoramic image is single image taken using an extraoral technique.
DIF: Comprehension REF: Page 244 OBJ: 1 | 2
TOP: CDA, RHS, I.B.1.c.ii. Describe appropriate technique for exposing panoramic radiography
MSC: NBDHE, 2.3 Technique
| a. | The patient’s head was turned to the right. |
| b. | The patient’s head was turned to the left. |
| c. | The patient is slumped. |
| d. | The patient’s teeth are behind the focal trough. |
ANS: B
If the patient’s head is turned to the right, the teeth on the patient’s right side would be closer to the receptor and would be smaller. If the patient’s head is turned slightly to one side and not centered on the biteblock, the posterior structures on the side closest to the receptor appear smaller and the posterior structures on the side farthest from the receptor are larger. If the patient’s head is turned to the left, the teeth on the patient’s left side would be closer to the receptor and appear smaller and the teeth on the patient’s right side would be magnified. When the patient is slouched, slumped, or not standing with the shoulders back, the x-ray beam passes through more of the cervical spine because the beam is angled upward at a negative vertical angulation (–10 degrees). The cervical spine appears as a radiopacity in the center of the image and obscures diagnostic information. If the patient’s anterior teeth are aligned too far back on the biteblock or posterior to the focal trough, the teeth appear “fat” and out of focus on the image. The roots of the anterior teeth may appear to be cut off.
DIF: Application REF: Pages 244, 256 OBJ: 8
TOP: CDA, RHS, I.B.1.c.ii. Describe appropriate technique for exposing panoramic radiography
MSC: NBDHE, 2.3 Technique
| 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. |
ANS: D
Bite-wing images are preferred for the detection of caries. Periapical images are preferred for the detection of periodontal disease. The panoramic image is preferred for evaluation of growth and development and eruption patterns.
DIF: Comprehension REF: Pages 244, 257
OBJ: 2 | 8
TOP: CDA, RHS, I.B.1.c.ii. Describe appropriate technique for exposing panoramic radiography
MSC: NBDHE, 2.3 Technique
| a. | horizontally in the same |
| b. | horizontally in the opposite |
| c. | vertically in the same |
| d. | vertically in the opposite |
ANS: B
In panoramic imaging, the x-ray tube rotates around the patient’s head in one direction while the receptor rotates horizontally in the opposite direction.
DIF: Recall REF: Page 244 OBJ: 3
TOP: CDA, RHS, I.B.1.c.ii. Describe appropriate technique for exposing panoramic radiography
MSC: NBDHE, 2.3 Technique
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