Question 1

What is restorative glass ionomer cement used for?

Accepted Answer

Restorative GIC is used for tooth-coloured fillings in Class III and Class V cavities, cervical and root lesions, primary teeth, ART and interim restorations, and as a liner or base under composite.

Question 2

Is GIC a permanent filling material?

Accepted Answer

GIC can last long-term in low-stress areas such as cervical lesions and in primary teeth. In large stress-bearing cavities in permanent posterior teeth it is usually used as an interim restoration, because it is weaker and wears faster than composite.

Question 3

What is the difference between a GIC filling and a composite filling?

Accepted Answer

GIC bonds chemically to the tooth, releases fluoride and tolerates moisture better, but it is weaker and less aesthetic. Composite is stronger and more aesthetic but needs an adhesive system and strict isolation.

Question 4

What is the difference between conventional GIC and resin-modified GIC?

Accepted Answer

Conventional GIC sets only by a chemical acid-base reaction. Resin-modified GIC also contains light-curing resin, so it sets on demand with a curing light, has higher early strength and better aesthetics, and is less sensitive to early moisture.

Question 5

Which GIC is used for posterior teeth?

Accepted Answer

High-viscosity GICs, such as GC Gold Label 9 Extra (Fuji IX Extra) and 3M Ketac Molar, are used for posterior restorations in primary teeth, ART and interim posterior restorations. Glass hybrid restoratives are another option where the manufacturer indicates them.

Question 6

How long does restorative GIC take to set?

Accepted Answer

Most conventional restorative GICs reach their initial set within a few minutes of mixing, and resin-modified GICs set when light-cured. The material keeps maturing for at least 24 hours, so the surface is protected with a varnish or coating (traditionally petroleum jelly) to prevent moisture contamination and drying out.

Question 7

Can restorative GIC be used for luting crowns?

Accepted Answer

No. Luting GICs (Type I) have a finer powder and lower film thickness for cementing crowns, bridges and bands. Restorative GIC is too thick for this and should not be used as a luting cement.

Question 8

What are the limitations of glass ionomer cement?

Accepted Answer

GIC has lower strength and wear resistance than composite, is sensitive to moisture and drying while it sets, and is less aesthetic. It is generally not suitable for large stress-bearing restorations in permanent posterior teeth.

Filters

Price Range

Category

Speciality

Brand

Country of origin

Procedure

Type of Product

Restorative Glass Ionomer Cements

Frequently Asked Questions

Restorative Glass Ionomer Cements (GIC) for Dental Restorations