Resin-modified glass ionomers
•Advantages:
1.Increased mechanical properties
2.Physiochemically bonds to tooth structure
3.Biocompatible, moisture forgiving
4.Similar coefficient of thermal expansion as dentin therefore a good dentin replacement material. (sandwich technique)
5.Ion lechability - Fluoride release(anticariogenic action)
6.Minimal polymerization shrinkage
7.