GLASS IONOMER CEMENT Glass Ionomer Cement is a tooth-colored dental restorative material that is used as filling and luting cement HOW IT WORKS?? GIC is based on the reaction of silicate glass powder ( calciumaluminofluorosilicate glass ) and polyacrylic powder, an ionomer. Sometimes instead of water acid is used. So occasionally reaction occurs which produces a powdered glass particle surrounded by a matrix of fluoride elements is known as polyalkenoate They bond chemically to the tooth structure and release fluoride. CLASSIFICATION Based On its uses TYPE I - Luting Cement Type II- Restorative Cement a. Restorative Esthetic b. Restorative reinforced Type III- For liner & amp; bases type IV- Fissure 7 Sealant Type V - Orthodontic cement Type VI- Core build-up. type VIi- High Flouride releasing Commanding Set Type VIII - Atraumatic Restorative treatment Type IX - Pediatric GIC ADVANTAGES 1Strong Adhesion to tooth Flouride releasing property - Results in the prevention of caries Flexibility in physical feature Resistant to demineralization Hydrophilic Properties i.e resistance to saliva contamination. Safe from any allergic reaction Good marginal adaptation Less leakage Highly biocompatible. DISADVANTAGE Low resistance to strength and abrasion Limited wear and tear resistance Very brittle and prone to fracture Difficult to mix, less working time for the dentist. CONCLUSION Because of the desirable properties of GIC, it's a very useful tooth-colored restorative material that can be used in low-stress areas like anterior proximal areas and smooth surfaces. Itsfluoridee-releasing properties are best to prevent carious lesions.