Exam 5- Class II comp, caries/pulp protection, Class III Flashcards Preview

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Flashcards in Exam 5- Class II comp, caries/pulp protection, Class III Deck (69):
1

Anatomy of a Caries: Which layer am I?? Teeming with bacteria, Acts as Nidus* of S.Mutans and Lactobacillus, Soft or leathery...Often, but not always, heavily stained. MUST be removed

Outer Carious Dentin

2

Outer carious dentin: what does it feel like? Can we leave it in the tooth?

soft, leathery...MUST BE REMOVED!

3

Anatomy of a Caries: Which layer am I?? Zone of bacterial invasion, Infected with bacteria, Infected Dentin, Collagen is denatured, Caries detecting stains work well here, Color can vary from dark to dentin colored depending on the growth rate of the disease, Cannot be remineralized- must be removed

TURBID LAYER (THE WAR ZONE)

4

Which layer is the zone of bacterial invasion?

the TURBID layer

5

Anatomy of a Caries: Which layer am I?? Deepest layer-No bacteria present-Affected Dentin-Advancing front-De-mineralized but collagen cross-linking intact-Capable of remineralization-Can be stained due to porosity & bacterial products-not nec remove

Transparent layer

6

Which layer of caries can I leave there?

The transparent layer

7

Does infected dentin contain bacteria?

Yes

8

Infected/Affected Dentin: Unable to remineralize

Infected Dentin

9

Infected/Affected Dentin: Able to remineralize

Affected Dentin

10

Infected/Affected Dentin: Stains with caries detecting solutions

BOTH infected and affected (so caries detecting solution can make us too aggressive!

11

How long does tertiary dentin take to develop?

20-40 days (schedule patient and check on progress)

12

Which hormone is released by the still healthy pulp to produce tertiary dentin?

TGF-B1 (Transforming Growth Factor)

13

Caries is considered _______, it has times of remineralization and demineralization.

Episodic

14

What is the CRITICAL pH for demineralization?

5.5

15

Is it necessary to restore white spot lesions?

NO! (check w radiographs tho)

16

Caries to the ____ SHOULD BE RESTORED! While caries PAST the _____ MUST be restored.

DEJ...DEJ

17

What do you use to remove the DEEPEST areas of recurrent decay near the pulp?

Hand instruments!

18

What type of caries are light yellow, soft/moist, and rapidly progressing?

ACUTE caries

19

What type of caries are darker, leathery and firm, and slowly progressing?

Chronic caries yo

20

What type of caries are dark brown/black, are very firm (mineralized), are NOT active-so we do NOT remove it!

Sclerotic or Arrested Caries

21

What type of caries is common in older and immunecompromised patients?

Root Caries

22

There is more complex ______ when the caries is sub gingival.

Bacteria

23

WHAT DOES ICDAS stand for???

International Caries Detection and Assessment System

24

What level of ICDAS is this and What is the Tx? Sound tooth surface,no caries change after air drying (5 sec),No hypoplasia, wear, erosion and other non-caries phenomena.

0...sealant

25

What level of ICDAS is this and What is the Tx? First visual change in enamel seen only after air drying colored change “thin” limited to the confines of the pit and fissure area

1...sealant

26

What level of ICDAS is this and What is the Tx? Distinct visual change in enamel seen even when wet, white or colored, “wider” than the fissure/fossa

2...sealant

27

What level of ICDAS is this and What is the Tx? Localized enamel breakdown, no visible dentin or underlying shadow
discontinuity of surface enamel, widening of fissure

3....Sealant/ PRR

28

What level of ICDAS is this and What is the Tx? Underlying dark shadow from dentin,+/- localized enamel breakdown;

4....MIR (minimally invasive restoration)

29

Histology of a LEVEL 1 ICDAS lesion-Depth in the pit and fissure is ____% into the dentin (the rest in the outer enamel).

level 1.0=10% in dentin

30

Histology of a LEVEL 2 ICDAS lesion-depth of the pit and fissure was ____% into the outer dentin.

50%

31

Histology if a LEVEL 3 ICDAS lesion-depth is ___% in dentin

77%

32

Histology of a LEVEL 4 ICDAS lesion- depth is ___% in dentin

88%

33

What level of ICDAS is this and What is the Tx? Distinct cavity with visible dentin; Frank cavitation involving less than half of a tooth surface

5...MIR

34

Histology of a LEVEL 5 ICDAS lesion-depth is ___% into dentin.

100%

35

What level of ICDAS is this and What is the Tx? Extensive distinct cavity with dentin cavity is deep and wide involving more than half of the tooth surface

6...MIR

36

Histology of a LEVEL 5 ICDAS lesion- lesion depth is ____% into dentin.

100% (inner 1/3 of dentin)

37

What % are cavitated if the lesion is in the outer 1/2 enamel?

0%

38

What % are cavitated if the lesion is in the inner 1/2 of enamel?

10.8%

39

What % are cavitated if the lesion is in the outer 1/2 of dentin?

40.9%

40

What % are cavitated if the lesion is in the inner 1/2 of dentin?

100 freggin %

41

What wavelength of light does CariVu (by Dexis) use?

near Infra-Red (non-ionizing)

42

Requirements for an INDIRECT pulp cap... no Hx of _______ pain

spontaneous

43

Requirements for an INDIRECT pulp cap... _____ response to thermal stimuli

normal

44

Requirements for an INDIRECT pulp cap... a _____ pulp

VITAL

45

Requirements for an INDIRECT pulp cap... a common method for a youngster with incomplete ____ formation.

root

46

Requirements for an INDIRECT pulp cap...place a thin liner like _______ over a chemical cleansing treatment like ______.

GI....CHX

47

The DIRECT pulp cap...for a small pulp exposure (

48

The DIRECT pulp cap...only use if it was due to the ________ and not caries.

operator

49

The DIRECT pulp cap...tooth should be _____ (hemorrhage) and ________ when thermal tested.

VITAL...asymptomatic

50

What is the material used for a DRECT pulp cap?

CaOH

51

What is the material used for an INDIRECT pulp cap?

GI

52

Using CaOH has a 92% success rate when used after a _______ exposure vs a 33% success rate when used after a ______ exposure.

mechanical...carious

53

Removing DEEP caries...use a ______ spoon first, then move to the _____er ones.

LARGE...smaller

54

Normal Dentin Feel-as we move closer to the pulp the dentin normally gets ______.

softer

55

Carious dentin feel-initally very _____ but then gets harder due to _______. What do we do with this dentin?

soft...sclerosis...LEAVE the sclerotic dentin!

56

When using my spoon on deep decay, what is my guide to know when I'm done?

quality of the SHAVINGS

57

Which step do we do first? Liner or bevels/retention?

LINER!!

58

Which material am I?? Avantages- F- release, chemical bond

G.I.

59

Which material am I?? Disadv- acid soluble, poor wear resistance

G.I.

60

Which material am I?? Advantafes- VERY STRONG

Zinc Phosphate

61

Which material am I?? disadv-Mixing technique senstive

Zinc Phosphate

62

Which material am I?? advantage-'sedative' to the pulp

ZOE...zine oxide Eugenol

63

Which material am I?? dis-adv- inhibits the setting of composite

ZOE..zinc oxide eugenol

64

Which material am I?? Advantage- Basic pH, sterile, direct pulp cap technique

Calcium Hydroxide paste

65

Which material am I?? disadv-breaks down quickly

Calcium Hydroxide paste

66

Which material am I?? advantage- Basic pH, sterile, hydrophilic, direct pulp cap technique

MTA (mineral trioxide aggregate) ((Portland Cement))

67

Which material am I?? disadvantage- EXPENSIVE

MTA (mineral trioxide aggregate) why is Portland Cement expensive??

68

What is an example of CaOH paste?

Dycal

69

What goes on after the DyCal in a direct pulp cap exposure?

GI