Using Glass Ionomers Flashcards
what do glass ionomers contain?
fluoroaluminosilicate
do they adhere directly or indirectly?
directly
where do glass ionomers get their cariostatic properties from?
the F release
properties of GI?
brittle, poor resistance to abrasion
what are some advantages of GI?
directly bond, easy to mix/manipulate, F release and uptake, if resin modified = Increased strength
disadvantages of GI?
wear resistance, not good compressive strength, poor aesthetics, finite working time
when to use?
abrasion/erosion, rsc, deciduous, as luting cement, temporary restorations, tunnel preps, art
what class cavities are GI used for?
class I and II - poor wear resistance and strength is a problem class III and IV if no other option
where to not use when using GI for abrasion/erosion cavities?
not on load bearing areas, Gi will not withstand
why is GI good for deciduous teeth?
teeth are finite, easy to use, F releasing, direct bonding
why used for class III and IV?
better wear resistance, mechanical strength, tooth coloured
how is GI used for tunnel prep? advantages?
syringed into cavity then composite on top
depth isnt a problem, directly bonds, no packing
what is ART?
when normal restorative technique is not conventional = underdeveloped countries, tx of anxious children
caries hand excavated and GI filled
why is GI used in rsc?
it is a non load bearing area
fluoride releasing
direct bonding
what form is GI in as a lining?
vitrebond
good strength for the permanent restoration
placed over CaOH
techniques of GI placement?
open sandswhich - GI placed in base of cavity
closed sandwhich - GI lines base of cavity and pulpo axial wall
indications of use for resin modified GI?
lining
base
sandwhich tecnhnique
why is GI used for a temporary restoration?
strength to withstand some time tooth coloured direct bond ease of use biocompatible
wait how long to finish?
what is GI sensitive to in first 24 hours?
24 hours
moisture - use varnish or petroleum jelly
