Operative Dentistry

Question 1

What are three things fluoride does?

Answer 1

1. Remineralization of tooth structure
2. Decreasing enamel solubility (lowering critical pH)
3. Interfering with metabolic activity of cariogenic bacteria

Question 2

What is the critical pH of Enamel FA?

Answer 2

4.5

Question 3

What is the critical pH of enamel CHA?

Answer 3

5.5

Question 4

What is the critical pH of dentin and cementum?

Answer 4

6.2-6.7

Question 5

What is the shape of pit fissure lesions?

Answer 5

Inverted v-shape

Question 6

What is the shape of smooth-surface lesions?

Answer 6

v-shaped

Question 7

Why can root-surface lesions progress rapidly?

Answer 7

No enamel to protect them

Question 8

Describe infected dentin appearance

Answer 8

Superficial, wet, soft, mushy, necrotic

Question 9

Describe affected dentin appearance

Answer 9

Deeper, dry, leathery, demineralized but not invaded by bacteria

Question 10

Describe what occurs after cavitation

Answer 10

An irreversible process that requires restorative treatment

Question 11

Describe Incipient/Reversible Caries

Answer 11

On smooth surface, appears opaque white when air-dried and seems to disappear when wet

Question 12

Describe Cavitated/Irreversible Caries

Answer 12

Enamel surface is broken (not intact) and usually the lesion has advanced into dentin

Question 13

Describe Location of Simple Caries

Answer 13

Covers one surface of a tooth

Question 14

Describe Location of Compound Caries

Answer 14

Covers two surfaces of a tooth (MO, DO)

Question 15

Describe Location of Complex Caries

Answer 15

Covers three or more surfaces of a tooth (MOD, MODFL)

Question 16

Describe Primary Caries

Answer 16

Original caries lesion

Question 17

Describe secondary/recurrent caries

Answer 17

Occurs at junction of tooth and restoration indicating micro-leakage