dental caries

Question 1

interproximal caries

Answer 1

1) 35% of enamel before it shows up radiographically
2) looks triangle in enamel

Question 2

proximal lesions

Answer 2

1) e1
2) e2
- last half
3) d1
4) d2
4) d3
- last third

Question 3

BWX radiographs

Answer 3

1) detect interproximal caries on posterior teeth
2) need to take good radiographs
- open contacts if possible

Question 4

root caries

Answer 4

1) more common in patients with bone loss
2) rampant decay
3) smaller can be confused with cervical burnout
- artifact
- diffuse and more generalized in image
4) caries is well defined in comparison
- more in periodontal bone loss

Question 5

occlusal caries

Answer 5

1) easier to detect clinically
2) semicircle in the dentin
3) mach band effect
- radiolucent line along the DEJ
- correlate clinically

Question 6

buccal / lingual caries

Answer 6

1) circular / oval shape
2) well-defined
3) intact surrounding tooth
4) use the slob rule

Question 7

recurrent

Answer 7

1) margins of existing restorations
2) new lesion that develops after
3) open margins

Question 8

radiolucent restorations

Answer 8

1) may be confused with recurrent or residual caries
2) look like a prep shape
3) look for a missing composite or a present restorations

Question 9

periodontal disease

Answer 9

1) complement to clinical exam
2) bone loss
I-IV (past middle third)

Question 10

BWX for periodontal disease

Answer 10

1) vertical BWX are better for bone loss
2) alveolar crest projects?

Question 11

normal periodontal bone loss

Answer 11

1) look for cortication at alveolar crest
- loss may be a sign of early perio
2) should be parallel and 0.5-2mm apical to the CEJ
3) may lose right angle

Question 12

calculus

Answer 12

1) radiopaque

Question 13

horizontal bone loss

Answer 13

1) alveolar crest > 2mm from the adjacent CEJ
2) alveolar crest is still parallel to the line between the CEJs of adjacent teeth

Question 14

vertical periodontal defect

Answer 14

1) single surface on a tooth
2) v shaped triangle coming from alveolar crest
3) or can look like PDL widening

Question 15

interdental caries

Answer 15

1) two walled trough like depression in cortication
2) mroe common in posterior teeth
3) deeper than you would see for early perio bone loss

Question 16

resorption

Answer 16

1) semicircular radiolucencies

Question 17

furcation bone loss

Answer 17

1) radiolucency is easy to see
2) except in maxillary molars
- J shaped due to 3 roots

Question 18

surrounding trabecular bone reactions

Answer 18

1) more lucent and sclerotic due to perio inflammation

Question 19

localized mucositis in maxillary sinuses

Answer 19

1) can be adjacent to a vertical periodontal defect

Question 20

periodontal abcess

Answer 20

1) occluded deeper periodontal pocket

Question 21

overhanding restoration

Answer 21

1 )food trap causes perio bone loss

Question 22

evaluation of perio therapy

Answer 22

1) recortication at a right angle is a good sign

Question 23

malignant neoplasms

Answer 23

1) can mimic radiographic appearance of perio
2) squamous cell carcinoma

Question 24

suspecion for malignanies

Answer 24

1) tooth mobility is localized and no other signs of perio
2) bone destruction with poorly defined borders and no sclerotic peripheral bone
3) irregular widening of PDL of the adjacent teeth
4) pattern of bone loss is not typical

Question 25

langerhan cell histiocytosis

Answer 25

1) localized or multiple areas
2) border is abnormal and tooth looks like its floating in space