Caries and Root Fractures

Question 1

Are caries gram positive or negative?

Answer 1

Gram Positive

Question 2

What kind of acid does bacteria produce?

Answer 2

Lactic acid

Question 3

What do we call the initial carious lesion?

Answer 3

An incipient lesion

Question 4

What predisposing factors promote caries development?

Answer 4

Retentive shape of teeth
Crowded teeth
Teeth defects

Question 5

What is the critical pH for enamel dissolution?

Answer 5

5.3 - 5.5

Question 6

What are classic features observed in a carious lesion?

Answer 6

Colour change
Loss of hard tissue
Stickiness to explorer tip

Question 7

Class I lesion

Answer 7

Occlusal surface/pits

Question 8

Class II lesion

Answer 8

Interprox of posterior teeth

Question 9

Class III lesion

Answer 9

Interprox of anterior teeth

Question 10

Class IV Lesion

Answer 10

Interprox including the incisal edge (anterior teeth)

Question 11

Class V Lesion

Answer 11

Gingival margin/cervical third

Question 12

Class VI lesion

Answer 12

Incisal edge/cusp tips of posterior teeth

Question 13

Caries that appear black or dark brown are…

Answer 13

Arrested caries

Question 14

Which bacteria initiates dental caries?

Answer 14

Steptococcus mutans

Question 15

Which bacteria progresses dental caries?

Answer 15

Lactobacilli

Question 16

What is the best predictor of future caries?

Answer 16

The past history of dental caries

Question 17

Caries in smooth surfaces progress _______ that proximal surfaces or in fissures

Answer 17

slower

Question 18

Where is the best place to look for caries on a radiograph?

Answer 18

Under the contacts

Question 19

What is radiographic burnout?

Answer 19

A radiolucency along the gumline, not carious

Question 20

What is the most accurate method of detecting interproximal caries?

Answer 20

Radiographs

Question 21

What is Hyperemia?

Answer 21

Reversible inflammation of the pulp
Sharp pain - 30-60 seconds
No radiographic changes

Question 22

What is chronic pulpitis?

Answer 22

Irreversible
Slow, gradual degeneration of nerve tissue
Root canal/extraction needed

Question 23

What is internal resorption?

Answer 23

Destruction of tooth structure that is initiated from within the pulp chamber or root canal
Tooth will appear ‘pinkish’

Question 24

What is external resorption?

Answer 24

Destruction of tooth structure that is initiated from the outside the tooth

Question 25

How is a simple enamel fracture treated?

Answer 25

Contoured with high speed hand piece

Question 26

How is a more involved fracture treated?

Answer 26

bonding/ resin restoration