Glass Ionomer as Cavity Liners

Question 1

how are glass ionomers cured?

Answer 1

light cured

Question 2

what is the thermal conductivity and diffusivity of glass ionomer liners

Answer 2

lower than dentine

Question 3

what is the compressive strength for glass ionomers?

Answer 3

> 170MPa which is higher than ZnO based materials

Question 4

what can glass ionomer seal which no other material can seal?

Answer 4

dentinal tubules

Question 5

what is released from RMGICs which are cytotoxic and effective against residual cavity bacteria?

Answer 5

benzoyl iodides and benzoyl bromides

Question 6

when should lining materials be used?

Answer 6

for cavities in dentine, for amalgam restorations and for larger composite restorations

Question 7

when is CaOH used?

Answer 7

when the cavity approaches the pulp

Question 8

what does CaOH need to be covered with and why?

Answer 8

RMGIC prior to final restoration as it protects the CaOH and prevents dissolution beneath the restoration