An introduction to glass ionomer cement
Glass ionomer cement is also referred to as polyalkenoate cement. It was discovered in the year 1969 by Wilson and also reported by Kent in 1971. There are basically nine types of GIC
Type 1 : Used in luting
Type 2 : Used as restoration
Type 3 : Used as liners and base
Type 4 : Used for fissures
Type 5 : Used for orthodontic purpose
Type 6 : Used as core build up material
Type 7 : Fluoride releasing GIC
Type 8 : For atraumatic restoration(ART)
Type 9 : Used for pediatric purpose
The composition of glass ionomer is unique as it has a powder liquid system
Powder composition
Aluminum fluoride
Aluminum oxide
Calcium fluoride
Sodium fluoride
Aluminum phosphate
Silicon dioxide
These components are heated around 1200 degrees and fused to form as one component "glass".
For radiopacity : zinc oxide,Barium is added,
Liquid composition
Copolymer with itaconic acid, maleic acid or tricarboxyllic acid and tartaric acid
Tartaric acid helps to increase working time and reduces the setting time.
0 comments:
Post a Comment