12. Caries Flashcards

1
Q

3

What does X-ray shadow formation depend solely on?

A
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2
Q

3

Will a demineralized region of tooth structure that has partially remineralized so that the total mineral content compared to sound tooth has not been reduced signficantly show a lesion shadow on a radiograph?

A
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3
Q

3

What percent mineral loss must there be for a lesion to be radiographically apparent?

A
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4
Q

5

Describe the radiation absorption and resulting density of a shadow in a long path vs. a short path.

A
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5
Q

6

What effect does a greater mass around a carious lesion have on a the radiation that hits the sensor?

A
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6
Q

7

Describe the angulation of an x-ray and the x-ray shadow.

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7
Q

9

What effect does demineralization have on shadow density?

A
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8
Q

9

What effect does remineralization have on shadow density?

A
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9
Q

9

What effect does a paralell x-ray beam relative to the long axis have on density? What about if the x-ray beam is angled inclined to the long axis (up or down)?

A
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10
Q

10

What shape are white spot lesions on radiographs?

A
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11
Q

15

What type of caries represents rapid severe progressive caries with no remineralization and therefore has high mineral loss and lucency?

A
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12
Q

15

What type of caries has partially remineralized lesions?

A
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13
Q

15

How do you differentiate between active and arrested caries in radiographs?

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14
Q

15

What is a higher risk interval between imaging examinations for active vs. arrested caries?

A
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15
Q

16

Describe the “vertical droop” angulation error

A
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16
Q

17

Do lesion shadows often overestimate or underestimate the depth of demineralization.

A
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17
Q

17

Do not confused carious lesions with ______.

A
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18
Q

17

Due to the variability of _____ and _____ it is NOT possible to reliably judge the depth of caries lesions.

A
19
Q

18

You can detect change over time with radiographs if the _______ and the _____ are constant.

A
20
Q

18

How do you know if the irradiation geometry or exposure has changed?

A
21
Q

19

How do we classify enamel lesions and dentin lesions?

A
22
Q

26

How do you monitor caries over time?

A
23
Q

28

What are three diagnostic pitfalls that can be confused as caries?

A
24
Q

29

What is cervical burnout?

A
25
Q

32

How do you know if something is interproximal caries or cervical burnout?

A
26
Q

34

What is the Mach-Band Effect? What can it be confused with?

A
27
Q

34

Mach-Band Effect:

________ arise as aa result of the differential stimulation and inhibition of neighboring receptors in the retina.

A
28
Q

36

Why will pit and fissure enamel caries not cast a shadow on bitewing radiographs?

A
29
Q

36

Will pits and fissure dentin caries cast a shadow on bitewing radiographs?

A
30
Q

36

What percent of pit and fissure dentin lesions will show a shadow on a bitewing?

A
31
Q

36

What percent of interproximal enamel caries show a shadow on bitewings?

A
32
Q

36

What is the diagnostic accuracy for interproximal enamel caries from a bitewing?

A
33
Q

37

When is the only time extraoral bitewings can be used? (Give 3 examples)

A
34
Q

38

By combining visual inspection and bitewings, what percent of non-cavitated small dentin pit and fissure lesions are detected?

A
35
Q

38

What percent of interproximal enamel non-cavitated lesions are detected?

A
36
Q

39

What is the difference between cavitated and non-cavitated?

A
37
Q

39

What can convert non-cavitated to cavitated lesions?

A
38
Q

39

Can caries progession stop at any stage?

A
39
Q

41

What is a BW radiograph scar?

A
40
Q

41

Is a BW radiograph scar a threat to the tooth?

A
41
Q

42

Is use of CBCT for the sole purpose of detecting caries encouraged or discouraged?

A
42
Q

44

Can you tell the true depth of a carious lesion on an x-ray?

A
43
Q

44

What do you look for to assess caries activity over time?

A