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Perio 1 2020 > Radiographs 10/25/16 > Flashcards

Radiographs 10/25/16 Flashcards

1
Q

T/F

The angle of the radiograph can raise or lower the appearance of the alveolar crest.

A

True

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2
Q

How do you determine if bone loss is horizontal or vertical?

A

Whether the bone is parallel to the CEJ or not

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3
Q

If the bone is parallel to the CEJ is it horizontal or vertical?

A

Horizontal

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4
Q

What area do you see between adjacent roots of teeth?

A

Interdental septa

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5
Q

T/F

The normal interdental septa is radiographically thick

A

False

It is normally radiographically thing

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6
Q

What is the radiopaque line that continues apically as alveolar bone proper?

A

Lamina Dura

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7
Q

What histological feature can you find in the lamina dura?

A

Rest of Mallaze

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8
Q

What is the space between the lamina dura and the root of the tooth?

A

Periodontal ligament space

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9
Q

Is lamina dura as dense as it looks in a radiograph?

A

No

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10
Q

T/F

The lamina dura is a radiographic artifact

A

True

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11
Q

What should the shape of the interdental septum follow?

A

The parallel line with the between CEJs

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12
Q

T/F

The level of the alveolar bone crest can drop during orthodontic treatment

A

True

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13
Q

How far should it be from the CEJ to the crest of the bone?

A

1.5 to 2 mm

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14
Q

What does the free gingival groove approximate?

A

Where the level of the Junctional epithelium is at

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15
Q

Does a gingival sulcus mean health or unhealthy?

A

health

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16
Q

What is the term for the gingival sulcus if the patient is no longer in full oral health?

A

Gingival pocket

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17
Q

How does the periodontal ligament space appear on a radiograph?

A

Thin radiolucent line between root and the radiopaque line outlining the root

18
Q

What can widening of the periodontal ligament be a sign of?

A
  • Occlusal trauma
  • Vertical root fractures
  • Scleroderma
19
Q

What would the tooth fill like clinically if the periodontal ligament is widened?

A

Loose

20
Q

What is the thickness of the PDL?

A

.1-.25mm

or 250 microns

21
Q

When is the PDL the widest?

A

During heavy occlusion

22
Q

When is the PDL thinnest?

A

In nonfunctional teeth

23
Q

T/F

As a general rule bone loss is generally less than it appears in the radiographs.

A

False

It is generally greater

24
Q

What percentage of bone mineral density is lost before it is detected radiographically?

A

30%

25
Q

What is the most important thing in regrowing bone?

A

stabilization of the blood clot

26
Q

T/F

Radiographs show amount of bone remaining rather than amount lost

A

True

27
Q

T/F

You can see the depth of the crater of bone loss from a radiograph

A

False

you can not see the depth it needs to be probed

28
Q

T/F

You CAN NOT see facial and lingual bone loss

A

True

29
Q

Does the presence of the lamina dura suggest that you have active disease?

A

No, the lamina dura is just an artifactual piece in the radiograph

30
Q

If you have little or no bone loss on a contiguous tooth, but a funnel shaped bone loss on the tooth what type of bone loss do you have?

A

Vertical bone loss

31
Q

IF you have bone loss in a localized area what is that suggestive of?

A

Localized damage/factor

32
Q

Loss of bone in the mesial and distal furcations of maxillary molars may present as a what?

A

Furcation arrow

33
Q

What is a tooth anomaly in the furcation area that can lead to bone loss?

A

Cervical Enamel pearl

34
Q

T/F

Connective tissue attaches onto enamel

A

False

It does not attach to enamel

35
Q

How much space does bone need to grow?

A

1 mm to 1.5 mm

36
Q

What can happen if you have a very close proximity of tooth roots?

A
  • Bone loss

- Periodontal destruction

37
Q

T/F

The absence of radiographic calculus means that calculus is not there

A

False

38
Q

T/F

Calculus can give you a false probing depth if you hit it

A

True

39
Q

What is periodontal abscess?

A

Localized collections of pus

40
Q

What are three features of aggressive periodontitis?

A
  • Rapid attachment loss
  • Minimal local factors
  • Genetics

Perio 1 2020 (9 decks)

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