12. Caries Flashcards
3
What does X-ray shadow formation depend solely on?
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?
3
What percent mineral loss must there be for a lesion to be radiographically apparent?
5
Describe the radiation absorption and resulting density of a shadow in a long path vs. a short path.
6
What effect does a greater mass around a carious lesion have on a the radiation that hits the sensor?
7
Describe the angulation of an x-ray and the x-ray shadow.
9
What effect does demineralization have on shadow density?
9
What effect does remineralization have on shadow density?
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)?
10
What shape are white spot lesions on radiographs?
15
What type of caries represents rapid severe progressive caries with no remineralization and therefore has high mineral loss and lucency?
15
What type of caries has partially remineralized lesions?
15
How do you differentiate between active and arrested caries in radiographs?
15
What is a higher risk interval between imaging examinations for active vs. arrested caries?
16
Describe the “vertical droop” angulation error
17
Do lesion shadows often overestimate or underestimate the depth of demineralization.
17
Do not confused carious lesions with ______.