Dental Caries Flashcards
1
Q
what 4 things are needed to cause caries?
A
susceptible tooth
time
sugar
plaque bacteria
2
Q
what is the prism core’s structure like?
A
tightly packed hydroxyapatite crystals with little inter crystal spaces
3
Q
what is the prism sheath structure like?
A
less well packed crystals
spaces contain water and organic material
where demineralisation starts
4
Q
what are the 4 zones of an enamel lesion?
A
translucent zone
dark zone
body of lesion
surface zone
5
Q
in what zone does demineralistion and remineralisation occur?
A
dark zone
6
Q
how does cavitation happen?
A
demineralisation
bacterial invasion
