cavity lining material

Question 1

which is thinner, cavity base or liner?

Answer 1

lining

Question 2

how does a cavity liner protect the pulp?

Answer 2

prevents thermal stimuli
stops bacteria, endotoxins and mciroleakane reaching pulp
calms down inflammation in pulp

Question 3

name some ideal thermal properties of a cavity liner?

Answer 3

low thermal conductivity

thermal expansion coefficient similar to dentine

Question 4

name some ideal mechanical properties of a cavity liner

Answer 4

high compressive strength

youngs modulus similar to dentine

Question 5

are cavity liners radiopaque?

Answer 5

yes

Question 6

which type of bond to cavity liners form with dentine?

Answer 6

chemical

Question 7

name some cavity lining materials

Answer 7

glass ionomer and RMGI (base or liner)
setting calcium hydroxide (liner)
zinc oxide cement (base)

Question 8

is calcium hydroxide liner cariostatic?

Answer 8

yes - bactericidal

Question 9

is zinc oxide base cariostatic?

Answer 9

no

Question 10

give some pros of glass ionomer

Answer 10

bonds to and seals dentine
bonds to composite resins
releases fluoride over time
command set
thermal conductivity and diffusely lower than dentine
thermal expansion similar to dentine
high compressive strength

Question 11

which substance is most often used as a liner for a cavity in dentine using amalgam or composite?

Answer 11

RMGIC

Question 12

when a cavity is approaching the pulp, which liner is most often used?

Answer 12

calcium hydroxide then RMGIC