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AU 15 - Perio Test 2 > Radiographic Examination > Flashcards

Radiographic Examination Flashcards

1
Q

T/F - Radiographs are diagnostic of periodontal disease

A

False - Radiographs can help us see clinical attachment loss that is caused by periodontitis

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2
Q

T/F - Radiographs are diagnostic of periodontal disease

A

False - Radiographs can help us see clinical attachment loss that is caused by periodontitis

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3
Q

What can radiographs tell us about the alveolar bone/bone loss

A

Amount of bone loss

Condition of the alveolar bone

Pattern of bone loss

Bone with loss in furcation areas

Width of the PDL space

Pathogenics

Anatomical considerations

Root proximity and C/R ratios

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4
Q

How do you calculate bone loss?

A

(CEJ - Crest) / (CEJ - apex) = bone loss percentage

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5
Q

What percentage of bone loss is considered ‘slight’?

A

<20%

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6
Q

What percentage of bone loss is considered ‘moderate’?

A

21-49%

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7
Q

What percentage of bone loss is considered ‘severe’?

A

≥50%

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8
Q

Why is correct Vertical beam angulation important?

A

If vertical angulation is incorrect, it can make the bone levels appear different than they actually are

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9
Q

What is the normal height of the alveolar crest?

A

2mm below the level of the CEJs on adjacent teeth

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10
Q

Why do crestal changes occur during inflammation?

A

Pathogens start to destroy the alveolar crest

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11
Q

When looking at the crestal lamina dura, how do we determine if it “has integrity”

A

If the crestal lamina dura is continuous, then it has integrity

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12
Q

When looking at the crestal lamina dura, how do we determine if it “has integrity”

A

If the crestal lamina dura is continuous, then it has integrity

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13
Q

What can radiographs tell us about the alveolar bone/bone loss

A

Amount of bone loss Condition of the alveolar bone Pattern of bone loss Bone with loss in furcation areas Width of the PDL space Pathogenics Anatomical considerations Root proximity and C/R ratios

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14
Q

How do you calculate bone loss?

A

(CEJ - Crest) / (CEJ - apex) = bone loss percentage

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15
Q

What percentage of bone loss is considered ‘slight’?

A
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16
Q

What percentage of bone loss is considered ‘moderate’?

A

21-49%

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17
Q

What percentage of bone loss is considered ‘severe’?

A

≥50%

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18
Q

Why is correct Vertical beam angulation important?

A

If vertical angulation is incorrect, it can make the bone levels appear different than they actually are

19
Q

What is the normal height of the alveolar crest?

A

2mm below the level of the CEJs on adjacent teeth

20
Q

Why do crestal changes occur during inflammation?

A

Pathogens start to destroy the alveolar crest

21
Q

T/F - We can use the integrity of the crestal lamina dura on radiographs to indicate the need for periodontal treatment

A

False - We have to use this information and also observe clinically before we can make an assessment

22
Q

When looking at the crestal lamina dura, how do we determine if it “has integrity”

A

If the crestal lamina dura is continuous, then it has integrity

23
Q

Vertical bone loss v horizontal bone loss

A

Horizontal = bone loss occurs on the same plane Vertical = bone loss occurs steeper in one area

24
Q
A
25
Q

How can you determine if an osseous defect is a 1, 2, or 3-walled defect?

A

Count the remaining osseous walls (ones that haven’t been destroyed)

If there is 1 remaining wall = 1 walled-defect

If there are 2 remaining walls = 2-walled defect

If there are 3 remaining walls = 3-walled defect

26
Q

What is an osseous crater?

A

A two-walled defect where the buccal and lingual walls are intact, but the proxmial bone is deficient

27
Q

What type of radiographs can you view osseous craters?

A

Periapical film (may not show up on BW)

28
Q

What is a Moat-like defect

A

An intrabony resorptive lesion involving one or more surfaces of supporting bone

29
Q

Bone loss in the furcation areas

A

Pathologic resorption of bone within a furcation

Shows up radiographically as a radiolucency in the furcation areas

30
Q

How can you detect furcation involvment?

A

Gutta-percha point on X-ray film

31
Q

What does a normal PDL look like on a radiograph?

A

The space between the tooth root and alveolar bone containing the PDL

The PDL appears as the PDL space of 0.4-1.5 mm on radiographs

Tends to be wider at the apex and alveolar crest

Tends to be narower in the mid-root areas

32
Q

What is a thickend radicular lamina dura and a widened PDL space a sign of?

A

Occlusal Trauma

33
Q

Where in the mouth are there more trabeculae?

A

Anteriorly and Superiorly

34
Q

What do vessels within interdental bone look like radiographically?

A

They appear as thin lines bordered by radiopaque lines in the bone traveling up towards the teeth

35
Q

Why can the maxillary sinus be an issue?

A

IF the maxillary sinus is close to or has invaginate among the roots of the maxillary teeth, there may be difficulties with surgical treatment of the periodontal problems

36
Q

Mandibular Tori radiographical image

A

A bony exostosis on the lingual aspect of the mandible

Seen generally in the premolar-molar area bilaterally

37
Q

Where is the mental foramen seenradiographically?

A

The image of the mental foramen can be seen as far forward as the distal of the first premolar and as far posteriorly as the mesial of the first molar

38
Q

What is a potential issue of roots in close proximity?

A

If roots are less than 2.5 mm apart, periodontal bone loss will affect the entire interproximal area

39
Q

What can Crown-Root ratio help us determine?

A

Can help us determine the patient’s prognosis related to periodontitis

1: 2 C:R ratio is ideal, and is favorabole
2: 1 ratio is unfavorable

40
Q

What are the different types of root resorption

A

Internal resorption

External resorption

41
Q

Internal resorption

A

Tooth resorption beginning from within the pulp

42
Q

External resorption

A

Reorption of tooth structure beginning on the external surface

43
Q

If a radiograph shows an implant with blurred threads, what does this indicate?

A

Unacceptable angulation of the X-ray tube

44
Q
A

AU 15 - Perio Test 2 (3 decks)

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