Radiographic Aids

Question 1

what are radiographs valuable for?

Answer 1

diagnosis
estimation of disease severity
prognosis
evaluation of tx outcome

Question 2

if the pt has sever attachment loss what kind of bwx should you take?

Answer 2

vertical

Question 3

how many mm of bone do we need to see in the xray

Answer 3

2-3mm

Question 4

t/f angulation can obscure bone contours

Answer 4

true

Question 5

what is the most accurate depiction of bone levels?

Answer 5

bw

Question 6

what does a mandibular molar furcation involvement look like on a radiograph?

Answer 6

an inverted radiolucent V

Question 7

what does a maxillary molar furcation involvement look like on a radiograph?

Answer 7

a furcation arrow

Question 8

what is the importance of the clinical exam in regards to radiographs

Answer 8

early destructive changes without sufficient demineralization of bone cannot be captured on radiographs

Question 9

T/F radiographs demonstrated changes in calcified tissue (future experience)

Answer 9

False (PAST experience)

Question 10

Radiographs may __________ bone loss

Answer 10

underestimate

Question 11

what is normal bone loss amount?

Answer 11

~2mm from CEJ to osseous crest

Question 12

how do you determine bone loss on radiographs?

Answer 12

measure from CEJ to osseous crest on bw and -2mm

Question 13

what is the bone loss % in 1mm?

Answer 13

10%
approx each mm of bone loss = 10%

Question 14

what is slight bone loss severity?

Answer 14

<15% (<1.5mm bone loss)

Question 15

what is moderate bone loss severity?

Answer 15

15-33% (1.5-3mm bone loss)

Question 16

what is severe bone loss severity?

Answer 16

> 33% (>3mm bone loss)

Question 17

bone loss usually correlates with ________

Answer 17

CAL

Question 18

what is the severity of periodontitis based on?

Answer 18

severity of CAL

Question 19

what is Stage I bone loss?

Answer 19

1-2mm CAL

Question 20

what is stage II bone loss?

Answer 20

3-4mm CAL

Question 21

what is stage III bone loss?

Answer 21

≥5mm CAL

Question 22

T/F you know from a radiograph if bone loss is on the facial or lingual

Answer 22

False

Question 23

what kind of defects do radiographs not indicate?

Answer 23

internal morphology or depth of crater defects

Question 24

what do you look for for early radiographic signs of bone loss?

Answer 24

disruption or “fuzziness” of lamina dura crestal cortication

Question 25

what are the advantages of digital radiography?

Answer 25

Speed
Lower radiation exposure
Ease of transfer/storage
Digital manipulation

SLED