Radiographic Aids Flashcards
what are radiographs valuable for?
diagnosis
estimation of disease severity
prognosis
evaluation of tx outcome
if the pt has sever attachment loss what kind of bwx should you take?
vertical
how many mm of bone do we need to see in the xray
2-3mm
t/f angulation can obscure bone contours
true
what is the most accurate depiction of bone levels?
bw
what does a mandibular molar furcation involvement look like on a radiograph?
an inverted radiolucent V
what does a maxillary molar furcation involvement look like on a radiograph?
a furcation arrow
what is the importance of the clinical exam in regards to radiographs
early destructive changes without sufficient demineralization of bone cannot be captured on radiographs
T/F radiographs demonstrated changes in calcified tissue (future experience)
False (PAST experience)
Radiographs may __________ bone loss
underestimate
what is normal bone loss amount?
~2mm from CEJ to osseous crest
how do you determine bone loss on radiographs?
measure from CEJ to osseous crest on bw and -2mm
what is the bone loss % in 1mm?
10%
approx each mm of bone loss = 10%
what is slight bone loss severity?
<15% (<1.5mm bone loss)
what is moderate bone loss severity?
15-33% (1.5-3mm bone loss)
what is severe bone loss severity?
> 33% (>3mm bone loss)
bone loss usually correlates with ________
CAL
what is the severity of periodontitis based on?
severity of CAL
what is Stage I bone loss?
1-2mm CAL
what is stage II bone loss?
3-4mm CAL
what is stage III bone loss?
≥5mm CAL
T/F you know from a radiograph if bone loss is on the facial or lingual
False
what kind of defects do radiographs not indicate?
internal morphology or depth of crater defects
what do you look for for early radiographic signs of bone loss?
disruption or “fuzziness” of lamina dura crestal cortication
what are the advantages of digital radiography?
Speed
Lower radiation exposure
Ease of transfer/storage
Digital manipulation
SLED
