Radio Dental Caries Flashcards
Which is more valuable bitewing or periapical?
bitewing
Which bitewing is best? PA?
posterior, anterior
Classical cone-shaped lesion has base of triangle towards?
surface in enamel
DEJ when in dentin
Proximal caries categories incipient moderate advanced severe
1/2 enamel
1/2 dentin
Occlusal caries categories
incipient
moderate
severe
difficult to detect
thin radiolucent line
large cavitation
What are recurrent caries?
caries next to existing restoration
Radiation caries induced by? Usually affects where?
lack of salivary flow
cervical region
How much % demineralization needed to detect?
30-50%
geometry of what affects signal to noise?
beam and lesion
Lesion is more visible if central ray how aligned with lesion?
goes through long axis of lesion
5 caries imitators
Cervical burnout Mach bands Composite restorations Attrition Toothbrush abrasion
Degree offset of PA and bitewing?
PA - 25
BW - 5
Normally alveolar crest how related to CEJ?
in line with CEJ and 0.5-2mm down
Normally aveolar crest how related to lamina dura?
sharp angle
Horizontal bone loss is what
loss in height that is still horizontal
Horizontal bone loss levels
Mild - 1-2mm
Moderate - 2mm to half
Severe - over half
Vertical bone loss is what
loss bone so crest not parallel to CEJ lines
Periodontitis classifications for radiographs
mild - 1/3
moderate - 1/3-2/3
severe - >2/3
Can radiographs detect pocket depths?
no
Aggressive periodontitis occurs in what ages, loss how much faster? Consistent with local factors?
Aggressive periodontitis affects what bone most? Bilateral or unilateral?
Crestal bone of first molars and incisors
Bilateral symmetrical
Aggressive periodontitis has been associated with what dysfunction?
neutrophil dysfunction
Diseases that influence course of perio disease (4)
Diabetes
Hematologic diseases (leukemia)
Genetic conditions (downs, hypophosphatasia)
AIDS
4 local contributing factors to perio
- Occlusal trauma
- Tooth mobility
- open contacts
- Local irritating factors
How do differentiate between cervical burnout and caries?
appear the same, but cervical burnout common in cone teeth in cervical 1/3. Explorer will be smooth
How to differentiate Mach bands?
will be the whole restoration border, not just one part
Composite restoration vs caries?
composite will be well-defined
attrition vs caries?
attrition will be on more than one tooth.
Abfraction?
well defined continuous line
