dentine hypersensitivity

Question 1

what is secondary dentine?

Answer 1

produced after tooth is fully formed
form slowly through out life
normally on floor and roof of pulpal chamber

Question 2

what is tertiary dentine?

Answer 2

produced when dentine is in contact with a noxious stimulus- caries, NCTSL

Question 3

what can be the cause of dentine hypersensitivity?

Answer 3

removal or enamel- NCTSL

denudation of root surface- gingival recession, perio disease and tx

Question 4

what is branstrums theory of sensitivity?

Answer 4

dentinal tubules contain fluid
stimuli causes fluid movement
excited nerve fibres, causing pain

Question 5

what tx re sensitivity?

Answer 5

occude tubules- potassium ions, potassium oxalate

insulative restorations

Question 6

name desensitising agents

Answer 6

stannous fluoride
sodium monofluorophosphate
calcium hydroxidestrontium/potassium chloride
formaldehyde

Question 7

name two resin adhesives used to block tubules

Answer 7

seal and protect

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