x ray test

Question 1

Processed PSP plates should handled by the edges tp prevent?

Answer 1

scratches

Question 2

What radiography equipment would most likely come into contact with mucous membranes and are considered semi-critical devices?

Answer 2

Sensors

Question 3

Which of the following errors occur when the vertical angulation is incorrect?

Answer 3

Elongation

Question 4

Why is it important for the patient to stand up straight when taking a panoramic image?

Answer 4

To prevent the spine from superimposed over the anterior teeth

Question 5

Dilaceration in a radiographic image indicates the ?

Answer 5

Root shape is abnormally bent or curved

Question 6

Which of the following would cause Elongation on radiograph?

Answer 6

Insufficient vertical angulation

Question 7

To help desensitize the issue prior to image receptor placement, the dental assistant should?

Answer 7

Rub a finger along the tissues where the receptor touches

Question 8

A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the patient?

Answer 8

Not placing the tougue against the palate

Question 9

On an anterior image, the alveolar crest normally appears?

Answer 9

Pointed and sharp

Question 10

Long-term effects of exposure to radiation may be associated with?

Answer 10

Birth abnormalities

Question 11

How is scatter radiation reduced when taking an image?

Answer 11

Use of rectangular cone

Question 12

The use of a thyroid collar is recommended for all the following radiographic exposures EXCEPT:?

Answer 12

PANORAMIC

Question 13

The maximum permissible dose (MPD) of ionizing radiation for occupational exposure is?

Answer 13

5.0 rem per year

Question 14

Which of the following results in a double image on a PSP radiograph?

Answer 14

exposing the same PSP twice

Question 15

The occlusal plane will appear diagonal in the radiograph when there is a/an ?

Answer 15

Incorrect placement of image receptor

Question 16

Light-colored radiographs commonly result from

Answer 16

Underexposure

Question 17

Which of the following describes how most carious lesions appears on an image?

Answer 17

Radiolucent

Question 18

Which image would be best utilized to see the relationship of the alveolar bone?

Answer 18

Vertical bitewing

Question 19

The edentulous radiographic ( defined as the complete loss of all dentition) series may include all of the following EXCEPT ?

Answer 19

Bitewing

Question 20

Compared to the paralleling technique a disadvantage of the bisecting angle technique is?

Answer 20

Image distortion

Question 21

The best way a dental assistant can minimize cross-contamination when exposing radiographs is to?

Answer 21

Touch as few surfaces as possible

Question 22

What can be done to stabilize the bite block on a partially edentulous patient?

Answer 22

cotton rolls

Question 23

Which of the following can help protects from excess radiations damage to tissues?

Answer 23

HIGH KVP

Question 23

Which of the following errors occur when the vertical angulations is incorrect?

Answer 23

Elongation

Question 24

Compared to a round position - indicting device (PID) , Which of the following PIDs reduces patient radiations exposure by up to 70 percent?

Answer 24

Rectangular-shaped

Question 25

Which of the following must be monitored for radiation Leakage?

Answer 25

Dental x-rays machines

Question 26

Where is the most common area in the oral cavity for a dentigerous cyst?

Answer 26

Around the third molars

Question 27

Which of the following helps to decrease exposure of the thyroid gland from the primary radiation ?

Answer 27

Paralleling technique

Question 28

How often should proctive clothing be changed in an oral healthcare setting?

Answer 28

When visibly soiled

Question 29

A panoramic image appears to have "reverse smiles" when the..?

Answer 29

Frankfort plane is angled upward