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RADIO INTERPRETATION > caries interpretation > Flashcards

caries interpretation Flashcards

1
Q

caries prevalence

A
  • one of the most prevalent human
    diseases
  • decreasing prevalence rate finally
    occurred in 1980’s
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2
Q

caries a dx of?

A

civilized society

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3
Q

caries associated with what diets? socio-economic?

A

highly refined sugar and retentive food diets that remains prevalent in lower socio-economic groups.

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4
Q

greatest cause of tooth loss <35 years

A

caries

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5
Q

DENTAL CARIES
Pathophysiology

A

plaque composed of polysaccharide /enzyme matrix with bacterial colonies that attach to tooth surfaces

bacteria metabolize dietary carbohydrate producing acid byproducts that lower pH below 5.5 threshold to decalcify teeth

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6
Q

DENTAL CARIES
Predisposing Factors

A
  1. bacteria –varies- dependent on host
    a. lactobacillus casei
    b. streptococcus mutans
    c. actinomyces viscosus
  2. diet –glucose
  3. plaque retention
  4. OH compliance
  5. saliva - concentrations of salivary glycoproteins and immunoglobulins
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7
Q

DENTAL CARIES Signs, ranges?

A

ranges from slight demineralization to gross coronal decay

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8
Q

defects of caries appear as violations of:

A

i. - smooth surfaces, usually at
inaccessible areas
ii. - pit and fissures of occlusal
and occasional proximal surfaces

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9
Q

diagnosis of caries

A

i. easy to diagnose
ii. Not so easy to stage
iii. Harder to treatment plan

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10
Q

preffered image for caries diagnosis

A

bitewings (horizontal)

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11
Q

what is acceptable HA for horizontal bitewings

A

anyhting less than 1/2 enamel overlapped

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12
Q

PA’s and caries detection

A
  1. Helpful for caries detection if XCP technique used to minimize linear distortion in the vertical dimension
  2. Horizontal angulation must project non-overlappedcontacts
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13
Q

vertical bitewings not as useful because?

A

a. technique problems from bending of the film
b. Difficulty placing film to open contacts

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14
Q

when could a vert BW work?

A

high palate

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15
Q

Factors affecting Caries Presentation
1. Angle of?
2. Placement of?
3. Location of?
4. Degree of?
5. Exposure?
6. cavitation?
7. light intensity?
8. Monitor?
9. postprocessing algorithms on digital images?

A
  1. Angle of the x-ray beam
  2. Placement of the image receptor
  3. Location of the proximal carious lesion (i.e. exactly cervical to the contact or slightly buccal/lingual)
  4. Degree of hypomineralization
  5. Exposure factors; low kV vs high kV;
  6. Degree of cavitation
  7. Ambient light intensity
  8. Monitor contrast resolution calibration
  9. Selection of postprocessing algorithms on digital images
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16
Q

Factors affecting perception of digital display

A
  • monitor resolution
  • monitor luminescence
  • background lighting affect
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17
Q

medical image grade monitors for dentistry ?

A

not proven to be necessary

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18
Q

caries classification system used at UMKC

A

IC=Initial caries
MC=Moderate caries
AC=Advanced caries
RSC-Root surface caries
R RC=Recurrent caries
B/Li = B or Li caries

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19
Q

IC

A
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20
Q

UMKC class?

A

IC

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21
Q

UMKC class

A

IC

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22
Q

MC

A
23
Q

UMKC class?

A

MC

24
Q

AC

A
25
Q

umkc class

A

AC

26
Q

umkc class?

A

AC

27
Q

app? demo? common areas?

RSC

A
  • Saucerized or scooped-out appearance
  • 50% prevalence in geriatric population due to bone loss
  • Most common in B premolar regions,
    then, followed by Li & interproximal areas
28
Q
A

RSC

29
Q

RC

A

recurrent caries, occur at restoration margins

30
Q
A

RC

31
Q

more common side/why? easily localized?

B/Li caries

A

occurring on B/L surfaces
usually on buccal (tongue can remove L plaque)
Difficult to localize on a single view
May superimpose pulp

32
Q
A

likely B carie

33
Q

International Caries Detection and Assessment System classes

A
  • E1
  • E2
  • D1
  • D2
  • D3
34
Q

E1-D3 classified

A

E1: Lesion within outer ½ of enamel
E2: Lesion within inner ½ of enamel
D1: Lesion within outer 1/3 of dentin
D2: Lesion within middle 1/3 of dentin
D3: Lesion within inner 1/3 of dentin

35
Q

E1 Interproximal Caries

A
  • Penetrates < ½ the enamel thickness as a radiolucent notch on the outer surface of the
    tooth
36
Q

ICDAS class

A

E1

37
Q

E2 Interproximal Caries

A
  • Penetrates > ½ the enamel thickness
  • May have an isosceles triangular outline with the
    base at the proximal surface
  • Does NOT extend to DEJ
38
Q

ICDAS class

A

E2

39
Q

D1 Interproximal Caries

A
  • Undermines enamel and extends into dentin
  • at or axial to the DEJ
  • Penetrates < 1/3 the outer peripheral dentin thickness
40
Q

ICDAS class

A

D1

41
Q

D2 Interproximal Caries

A
  • The dentin lesion is a more extensive dentin lesion
  • Penetrates to mid 1/3 of the dentin thickness
42
Q

ICDAS class

A

D2

43
Q

ICDAS class

A

D2

44
Q

D3 Interproximal Caries

A
  • The dentin lesion is more extensive than the enamel lesion
  • Penetrates > 2/3 (or inner 1/3) of the dentin thickness
45
Q

ICDAS class

A

D3

46
Q

ICDAS class

A

D3

47
Q

Interproximal “Burn out”

A

A. The dentin artifact simulates caries
B. Lesion is outlined by normal anatomic structures and is a relative radiolucency

48
Q

what is this lesion?

A

cervical burnout
B/L line angles are not aligned

49
Q
A

burnout

50
Q

Incipient Occlusal Caries on radiographs

A
  • Difficult to detect on radiographs due to
  • small width of the lesion
  • density of superimposing enamel
51
Q

Moderate Occlusal Caries on radiographs

A
  • Broad-based thin radiolucent zone in dentin with no changes in enamel
  • Noticed as a relative increase in opacity between pulp and caries
52
Q
A

moderate occlusal caries

53
Q

Severe Occlusal Caries on radiogrpahs

A
  • Undermined enamel with gross loss of tooth structure

RADIO INTERPRETATION (18 decks)

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