Radiographic Interp. 8 (Perio)

Front 1

In periodontal disease, which direction does the junctional epithelium migrate?

Back 1

apically

Front 2

(long/short) scale gives you more detail

Back 2

long

Front 3

Does high or low kVp give you better visualization of bony detail and tooth roots?

Back 3

high

Front 4

You get straighter photons with a (short/long) BID

Back 4

long

Front 5

(Bitewings/PAs) more accurately record the distance between CEJ and crestal bone

Back 5

bitewings

Front 6

If the PDL and lamina dura cannot be seen, we are likely (over/under) angulated on the maxilla

Back 6

over

Front 7

The distance between the CEJ to the crest of the bone should be between __ and __ mm

Back 7

1.5-2

Front 8

What % of bone loss is usually needed before it is detectable?

Back 8

30-50%

Front 9

What type of radiograph analysis can detect bone loss after only about 5%?

Back 9

digital subtraction (although, it is rarely used)

Front 10

Conventional radiographs provide a (2/3) dimensional view

Back 10

2

Front 11

True or False, radiographs are very good at detecting the extent of mobility

Back 11

False

Front 12

What are some limitations to radiographs when it comes to perio disease?

Back 12

Can't see soft tissue to hard tissue relationship
can't see facial or lingual aspect of teeth
Can't see extent of mobility
can't see early furcations
doesn't reveal the difference between successful and unsuccessfully treated cases

Front 13

Radiographs show (more/less) bone destruction than there actually is

Back 13

less

Front 14

Increased width of PDL, resorption of lamina dura, and bone loss (& decrease in bone density) are all signs of what?

Back 14

perio disease

Front 15

Radiographs will reveal a (increased/decreased) width of PDL, (deposition/resorption) of the lamina dura, and bone (formation/loss) in periodontal disease

Back 15

increased, resorption, loss

Front 16

True or False, restoration overhangs do not trap plaque because plaque cannot adhere to metal effectively

Back 16

False! They do trap plaque

Front 17

(heavy/open) contacts can lead to food impaction

Back 17

open

Front 18

What are the 5 main functions of tooth contacts and embrasures?

Back 18

allow food to escape occlusally
prevent food impaction
protect the periodontium
distribute force
stabilize arch

Front 19

True or False, calculus is never mineralized enough to be visible on radiographs

Back 19

false, with lots of mineralization, it will be visible!

Front 20

Indistinctness and interruption of __ along the mesial and distal aspect of the interdental alveolar crest is a sign of problems

Back 20

lamina dura

Front 21

In the (anterior/posterior) region, damage to the alveolar crest will appear as blunting

Back 21

anterior

Front 22

In the (anterior/posterior) region, damage to the alveolar crest will appear as loss of sharp angle between LD and alveolar crest, loss of normal cortical surface, and irregular or diffused border

Back 22

posterior

Front 23

Widening of the PDL by bone resorption along mesial or distal aspect of interdental crestal bone is called

Back 23

Triangulation (or funneling)

Front 24

funneling is also called _____

Back 24

triangulation

Front 25

The sides of the 'triangle' in triangulation are formed by the __ & ___ and the base it towards the (crown/root)

Back 25

alveolar bone, root surface, crown (apex towards root)

Front 26

Finger-like radiolucencies extending from the crestal bone into the interdental bone are known as ___ bone changes

Back 26

interseptal

Front 27

nutrient canals become (more/less) prominent in interseptal bone changes

Back 27

more

Front 28

Reactive sclerosis is a defense mechanism where what occurs?

Back 28

Deposition of more bone to fight against infection progress

Front 29

Normal bone level is located approximately __-__mm apical to the CEJ of tooth

Back 29

1-1.5

Front 30

Which is more generalized, horizontal or vertical bone loss?

Back 30

horizontal

Front 31

(horizontal/vertical) bone loss occurs on plane parallel with a line connecting CEJ's of adjacent teeth

Back 31

horizontal

Front 32

(horizontal/vertical) bone loss occurs on plane not parallel to line connecting CEJ's of adjacent teeth

Back 32

vertical

Front 33

(vertical/horizontal) bone loss is typically due to local irritants and not many other factors

Back 33

horizontal

Front 34

(vertical/horizontal) bone loss is typically due to a variety of factors

Back 34

vertical

Front 35

Infrabony pockets may be classified as:

one-wall, two-wall, three-wall, or four-wall.

What are the general descriptions of these names?

Back 35

One-wall: hemiseptal
Two-wall: crater-like
Three-wall: three walls with root forming the 4th wall-more common on mandibular molar region
Four walled: circumferential, surrounds the tooth

Front 36

A (1/2/3/4) wall defect is identical to vertical deformities

Back 36

1

Front 37

The normal CROWN to ROOT ratio is __:__

Back 37

1:2

Front 38

A (wider/narrower) PDL indicates potential tooth mobility

Back 38

wider

Front 39

Where are furcations MOST common?

LEAST common?

Back 39

Most common - man molars
least common - max premolars

Front 40

Furcations can only be seen radiographically at what point?

Back 40

when the bone extends apically beyond the furca

Front 41

Radiograph symptoms of chronic periodontitis may occur __-__ months after initial disease onset

Back 41

6-8

Front 42

True or False, if there is a very sharp angle between the LD and alveolar crest in the posterior region, this is a sign of chronic periodontitis

Back 42

False, the LOSS of a sharp angle

Front 43

(mild/moderate/severe) horizontal bone loss is 1-2 mm of loss

Back 43

mild

Front 44

(mild/moderate/severe) horizontal bone loss is up to the midpoint of root or furcation area

Back 44

moderate

Front 45

(mild/moderate/severe) horizontal bone loss is anything beyond the furcation area

Back 45

severe

Front 46

(horizontal/vertical) bone loss is typically localized

Back 46

vertical

Front 47

What is a good indirect method to detect infrabony defects?

Back 47

use gutta percha

Front 48

What is the etiology of aggressive periodontitis?

Back 48

unknown!

Front 49

The rate of bone loss in agressive periodontitis is __-__ times faster than expected

Back 49

3-4

Front 50

Diastima and distolabial migration of what teeth are indications of aggressive periodontitis?

Back 50

max incisors

Front 51

What is the best way to detect periodontitis radiographically?

Back 51

Take images over time and compare them

Front 52

True or False, the bone indicated by the blue arrow is in error

Back 52

True (bone is not actually taking up proximal area. Wrong angulation!)

Front 53

The radiograph indicated a problem with the teeth indicated in the orange circle. What is it?

Back 53

open contacts

Front 54

What small RO tabs are indicated by the black arrows?

Back 54

calculus

Front 55

What is indicated by ALL the black arrows on both films?

Back 55

calculus

Front 56

What RO tabs are indicated by the two black arrows?

Back 56

restoration overhang

Front 57

What is the name for the process indicated by the black arrows?

Back 57

funneling (or triangulation)

Front 58

Whats the name for the process that makes this area slightly more RO than expected?

Back 58

reactive sclerosis (new bone deposited to fight infection)

Front 59

What are indicated by the white arrows?

Back 59

nutrient canals

Front 60

Which is horizontal bone loss? vertical?

Back 60

horizontal - 1
vertical - 2

Front 61

Is this horizontal or vertical bone loss?

Back 61

horizontal

Front 62

Is this horizontal or vertical bone loss?

Back 62

horizontal

Front 63

This is a (#) wall defect

Back 63

1

Front 64

This is a (#) wall defect

Back 64

2

Front 65

The tooth on the far left is (more/less) mobile than a normal tooth

Back 65

More mobile (wider PDL)

Front 66

What is the name for the RL area indicated by the black arrow?

Back 66

furcation

Front 67

Horizontal or vertical bone loss?

Back 67

vertical bone loss