Dentine caries

Question 1

how does dentine respond to caries? 3

Answer 1

sclerotic dentine -> blockage of tubules by mineral
reactionary dentine
reparative dentine

Question 2

what are the 3 zones of a dentine lesion?

Answer 2

advancing front
zone of bacterial penetration
zone of destruction

Question 3

what occurs at the advancing front?

Answer 3

demineralisation -> acid damage (sterile - not infected)

Question 4

what occurs at the zone of bacterial penetration?

Answer 4

bacteria are in tubules (lactobacilli) -> infected dentine

Question 5

what occurs at the zone of destruction?

Answer 5

mixed bacterial population with proteolytic enzymes, destroy the organic matrix - loss of structure

Question 6

which zone of dentine lesion is this?

Answer 6

zone of destruction

Question 7

which zone of dentine lesion is this?

Answer 7

zone of bacterial penetration

Question 8

which zone of dentine lesion is this?

Answer 8

advancing front

Question 9

what type of dentine is this?

Answer 9

sclerotic dentine

Question 10

what type of dentine is this

Answer 10

reactionary tertiary dentine

Question 11

what is the clinical significance of occlusal (fissure) caries?

Answer 11

reaches dentine at a large linear interface rather than a point