Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
What is cervical burn out?
|
It is blurring of the edge of teeth around the cervical area due to convexity of the proximal surface.
|
|
|
What is the limitation on the diagnosis of caries using radiograph?
|
1 the carious lesions are actually larger than what shows in radiograph
2. variation in angulation cause caries to appear extending into dentine 3 exposure factors (may not show) 4 superimposition (eg existing restorations & recurrent caries) |
|
|
What are the classification of caries in radiology?
|
incipient (<1/2 enamel)
moderate(>1/2 enamel but not DEJ) advanced(<1/2 dentine) severe(>1/2 dentine) |
|
|
how much should caries lesion advance before it can be detected by radiograph?
|
50% demineralization is required for detection
|
|
|
What are the factors affecting caries diagnosis using radiograph?
|
buccolingual thickness of tooth
two dimensional film x-ray beam angle exposure factors |
|
classify
|
moderate
|
|
classify
|
a advanced
b.incipient c. moderate |
|
classify
|
top: incipient
bottom: moderate |
|
classify
|
moderate
|
|
classify
|
moderate
|
|
classify
|
moderate
|
|
classify
|
advanced
|
|
classify
|
severe
|
|
classify
|
severe
|
|
|
features of occlusal caries on radiograph?
|
must have penetrated into dentine
difficult to see unless large |
|
|
features of buccal/lingual caries on a radiograph?
|
depth cannot be determined
can't differentiate between buccal and lingual |
