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Perio - Exam 2 > Perio Radiology > Flashcards

Perio Radiology Flashcards

1
Q

What are three basic intraoral radiographic techniques to consider?

A

Horizontal bitewing

Vertical bitewing

Periapical

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2
Q

When are horizontal bitewing ordered?

A

When the pt has SLIGHT TO MODERATE horizontal bone loss

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3
Q

What 4 things do radiographs aid in?

A

Diagnosis of periodontal disease

Determination of the prognosis

Tx options

Evaluation of the outcome of treatment

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4
Q

T/F - Radiographs are an adjunct to the clinical examination, NOT A SUBSTITUTE FOR IT.

A

TRUE

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5
Q

W/o radiographic images, the clinician can not effectively evaluate what 4 things?

A

Alveolar crystal bone architecture

Crown-to-root ratio/calculus presence

Possible vertical or furcation defects

Amt of horizontal bone loss

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6
Q

A properly positioned horizontal bitewing should show what 3 things?

A

Superimposition of buccal and lingual/palatal cusps

Sharp or well-defined alveolar crestal margin

No horizontal overlap b/t adj teeth

  • Bony crest is visible in both arches, but it is close to the edge of the film b/t mandibular premolars
  • Root trunks of the molar teeth are not entirely visible
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7
Q

Vertical bitewings are useful when?

A

MODERATE TO SEVERE horizontal bone loss

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8
Q

T/F - Generally, vertical bitewings are more informative than horizontal bitewings on detecting moderate to severe periodontal diseases.

A

TRUE

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9
Q

T/F - An accurate assessment of bone height is essential to successful periodontal disease management.

A

TRUE

PAs have a tendency to distort the distance b/t the alveolar osseous crest and CEJ compared to a bitewing

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10
Q

What technique is important for periapicals?

A

Paralleling technique

—X-ray beam head parallel to the film and tooth

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11
Q

T/F - Paralleling technique is the most realistic image to evaluate level of alveolar bone similar to a proper bitewing radiograph.

A

TRUE

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12
Q

PAs are essential for assessing what 4 things?

A

Crown-to-root ratio

Root morphology

PDL space

PA status

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13
Q

Where is the normal interdental septum found?

A

B/t the roots of adj teeth

—Absence doesn’t mean diseased state

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14
Q

How does the interdental septum appear on a radiograph?

A

Radiopaque border at alveolar crest

*Lamina dura

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15
Q

The shape of the interdental septum is a fx of the __________ of the contiguous teeth.

A

MORPHOLOGY

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16
Q

An apparent vertical defect in the interdental septum is really caused by what?

A

Tooth angulation/inclination

17
Q

In normal health, what is the approximate distance b/t the CEJ and the crest of bone at each tooth surface?

A

1.5 - 2.0 mm

18
Q

How can the PDL space be discerned on a radiograph?

A

Thin, radiolucent line b/t the root and the radiopaque lines that outlines the root

19
Q

Widening of the PDL space is seen with _______ _______ as well as vertical root fracture and progressive systemic sclerosis.

A

Occlusal trauma

20
Q

What is the normal thickness of the PDL?

A

0.1 - 0.25 mm

21
Q

When is the PDL the widest?

A

During heavy occlusion, and thinner in nonfunctional teeth

22
Q

What is the surface area of the socket wall?

A

150 - 275 sq mm - single root

450 sq mm for multirooted

23
Q

T/F - Bone loss is generally greater than it appears in the radiographs.

A

TRUE

24
Q

___% of bone mineral density is lost before it is detected radiographically.

A

30%

25
Q

Horizontal bone loss is what?

A

Symmetric loss of bone on both the mesial and distal surfaces of contiguous teeth
—Bony architecture appears to be rather flat

26
Q

Tell me about vertical bone loss/defects.

A

FUNNEL-shaped appearance and plunge apical on ONE tooth surface
—Little or no bone loss on the contiguous tooth

27
Q

Healthy bone loss is how much per year?

A

0.1 mm/year 1 mm/10 years

28
Q

Loss of bone in the furcation areas of molar teeth may occur as a result of what?

A

Periodontitis

Endodontic infection

Root perforation during dental procedures

Occlusal trauma

29
Q

“Bone spurs” on a radiograph are indicative of what?

A

Heavy calculus

30
Q

Loss of bone in the mesial and distal furcations of maxillary molars may present as a _________ ________.

A

Furcation arrow

31
Q

What is a cervical enamel pearl (CEP)?

A

Dot of enamel

More common for: maxillary third>second>first molars

32
Q

T/F - Close proximity of tooth roots will have thin interproximal septum which leads to an increased risk of bone loss and periodontal destruction.

A

TRUE

33
Q

T/F - The radiograph is NOT a sensitive indicator of calculus.

A

TRUE

34
Q

Tell me about periodontal abscesses.

A

Acute, destructive process in the periodontium from localized collection of suppurations communicating with the oral cavity thru the sulcus

  • Generally a discrete area of radiolucency
  • If a foreign body, remove it, and let the body take over from there.
35
Q

What are 3 features of aggressive periodontitis?

A

Rapid rate of attachment and bone loss

Minimal local factors

Familial aggregation of diseased individuals (Genetics)

*Common with 1st molars and incisors

36
Q

T/F - Bone loss happens faster w/ smoking.

A

TRUE

37
Q

T/F - The radiographs and the clinical periodontal exam complement each other, and neither is sufficient by itself.

A

TRUE

-Provides a foundation for diagnosis, prognosis, and tx planning

38
Q

T/F - Actual clinical bone loss is more than radiographic bone loss.

What percentage?

A

TRUE

30%

Perio - Exam 2 (8 decks)

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