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2ND Yr CSA- Radiography > Radiography of Periodontal Disease > Flashcards

Radiography of Periodontal Disease Flashcards

1
Q

What do you ned to carry out before reaching a diagnosis?

A
  1. Need to take a full history of the patient
  2. Need to carry out examinations nd screening
  3. Can als tae radiographs
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2
Q

Give the key reliable feature we use to check if the periodontium is healthy on a radiograph

A

If the distance between the crystal bone and cemento enamel junction (CEJ) is 2-3mm then theres no loss of attachment so no periodontitis

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3
Q

Give other radiographic features of a healthy periodontium

A
  1. Thin, smooth evenly corticated margins to the interdental crystal bone
  2. Thin, even pointed margins to the interdental bone
  3. Interdental crystal bone is continuous with the lamina dura
  4. Thin even with to the mesial and distal periodontal membrane space
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4
Q

Why is cortication not evident in radiograph of a healthy periodontium

A

Because theres a sallows about of bone between the teeth anteriorly

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5
Q

Give some limitations of radiographs

A
  1. 2D view of a 3D situation
  2. Bony defects may be hidden
  3. Only interproximal bone seen clearly
  4. Radiographs under estimate boen destruction
  5. 30-50% of the bone mineral content must be lost before changes are detected radiographically
  6. No info on soft tissues
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6
Q

What can radiographs show

A
  1. Bone loss
  2. Mobility
    3, Oclusal trauma
  3. Calculus and marginal overhangs
  4. Crown-root ratios
  5. Sclerosis
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7
Q

What information can radiographs give about bone levels?

A

The extent and pattern of bone loss

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8
Q

What 2 things do we record in relation to bone levels?

A
  1. Staging

2. Grading

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9
Q

How do we stage bone levels?

A

We record the inter proximal bone loss at the worst sire to determine the severity of the disease

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10
Q

What does grading show and how do we grade bone loss?

A

Grade= % of bone loss divided by patients age

this helps us determine the RATE of progression of the disease

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11
Q

How do we determine the severity of bone loss?

A

By recording the inter proximal bone loss at the worst sire in the mouth

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12
Q

How do we determine the rate of progression of bone loss?

A

By dividing the % of bone loss by eh patients age

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13
Q

How Is extent of bone loss measured ?

A
  1. Recording the % root length if the apex can be seen

2. Recording m if magnification is 1:1

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14
Q

Give the3 patterns of bone loss

A
  1. Horizontal
  2. Vertical
    3, Furcation involvement
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15
Q

How can you see horizontal bone loss on a radiograph?

A
  1. The crest will be horizontal relative to occlusal plane
  2. Bone levels will be positioned apically to normal levels
    3 There may be loss of buccal and lingual plates and intervene bone
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16
Q

How can you detect furcation involvement?

A
  1. Check if here are local plaque retentive factors
  2. May be detectable by probing
  3. Radiolucency at furcation
  4. On the upper molar look fo arrowhead
17
Q

What are combined lesions?

A

Bone loss involving apex and root face

18
Q

Why might combined lesions arise?

A

May arise from non vital toot and discharge along periodontal membrane space

19
Q

How can you see mobility on a radiograph?

A

Can see widening of the periodontal membrane space

20
Q

How can you see occlusal trauma on a radiograph?

A
  1. Marginal widening
  2. Angular defect
  3. Root resorption
  4. Hypercementosis
  5. Root fracture
  6. Loss/thickening of lamina dura
  7. Bone sclerosis
21
Q

Name the only way we can record crown root ratios

A

By taking radiographs

22
Q

Name the 3 types of radiographs we use

A
  1. Bitewings
  2. periapicals
  3. Panoramic
23
Q

What do panoramics show?

A

The entire dentition in one film

24
Q

Give some disadvantages of panoramics

A
  1. Overlapping teeth In some areas

2. Careful patient positioning required

25
Q

Give some advantages of panoramics

A
  1. Time efficient
  2. Lower patient dose
  3. Patient tolerance
26
Q

Give some advantages of bitewings to detect periodontitis

A
  1. Bitewings are more reproducible

2. May already have them for caries diagnosis

27
Q

Give some disadvantages of bitewings to detect periodontitis

A

As you can’t se the apex bone losses an estimate

28
Q

Give some advantages of Periapicals to detect periodontitis

A
  1. High quality and reproducible
29
Q

Give some disadvantages of Periapicals to detect periodontitis

A
  1. Need a film holder and paralleling technique
    2, Full mouth periodicals can be time consuming
  2. Can expose patient to a relatively high dose of radiation

2ND Yr CSA- Radiography (2 decks)

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