Why do we apply varnish on GIC?

hence, sealing of GIC from aqueous media improves flexural strength. The cure lamp emitted heat, which may enhance the flexural strength of specimens coated with light-cured varnish.

Why do we apply Vaseline on GIC?

Similarly petroleum jelly also impedes the fluoride release, but to a very less extent. We suggest that in situations where the fluoride release property is more important than other properties it is better to coat the GIC with petroleum jelly or leave the restoration without any coating.

How do I protect my GIC?

Varnishes, adhesive systems and petroleum jelly can be used as GIC coatings and among those, petroleum jelly is considered a good option due to its safety and biocompatibility; ⁷ however, petroleum jelly can be easily washed away ¹³ and a surface coating that lasts longer is desired, as the GIC should be isolated from ...

Can you polish glass ionomer?

Polishing Glass-Ionomers

Glass-ionomers typically have a rougher surface than esthetic composite materials, however, they should be polished using a light pressure and a slow speed.

Does GIC need light cure?

Auto cure GIC is preferable as a restorative material to Light cured GIC, or resin modified glass ionomer cement (RMGIC). RMGICs have poor wear resistance on occlusal surfaces and in larger restorations the curing light does not penetrate to the base of the restoration (due to the high opacity).

Pulp Protection Simplified | Varnish | Part 1

What is varnish in dentistry?

Dental varnishing is one method of fluoride treatment. It involves applying a varnish rich in fluoride to the enamel, which helps strengthen it and protect against caries. The procedure is fast and safe. It may be used for caries prevention in adults as well as in children.

Do you etch before GIC?

The results suggest that phosphoric acid etching of GIC prior to the placement of composite resin does not improve the sealing ability of sandwich restorations. The RMGIC was more effective in preventing dye penetration at the GIC-resin composite- dentin interfaces than CI.

What are indications for polishing?

Here are the indications for coronal polishing: Removal of light stain. Removal of light plaque. Placement of sealants.

What materials should be avoided when polishing esthetic restorations?

Yet, this agent should be avoided on restorative materials, including amalgam, gold, porcelain, composites, and glass ionomer cements (see Figures 14-19).

What are the structural components of restorative and esthetic materials?

Composites are the most widely used esthetic restorative materials and are made of three structural components: a matrix, which is a plastic resin material (bis-GMA) for binding the filler particles; filler particles, such as glass, silica, quartz, or resin and/or short fibers; and a silane coupling agent that promotes ...

How long does GIC take to set?

The entire process may take up to 4 weeks time. Extra charges are applicable for the refund process as per the Scotiabank GIC refund policy.

What is the disadvantage of GIC?

Disadvantages of GICs

You'll need to tie up your money for the entire term if you want to get the full return. The interest rate offered on GICs may not beat inflation. You'll be taxed on the interest earned if the GIC is held outside of a registered account.

How many types of GIC are there?

Maximize your returns by laddering GICs

Invest each of those smaller amounts in separate GIC terms: 1-year, 2-year, 3-year, 4-year, 5-year. Then, when each term matures, you can access some of the money if you need it or reinvest in a GIC with a 5-year term.

Why Vaseline is used in dentistry?

Petroleum jelly and olive oil seem to be better alternatives to varnish when used for coating fresh glass-ionomer cement. They also are able to cover proximal surfaces restorations in class II and III cavities.

What is sandwich technique in dentistry?

The sandwich technique is a specific strategy in restorative dentistry used for fillings. In both open and closed sandwich techniques, the different materials of the composite resin is layered or “stacked” onto the tooth, similar to building the layers of a sandwich.

What is the purpose of selective polishing?

Selective polishing is a procedure in which only those teeth or surfaces with stain are polished. The purpose of selective polishing is to avoid removing even small amounts of surface enamel unnecessarily. In some individuals, stain removal may cause dentinal hypersensitivity during and after the appointment.

Which is an indication for sealants?

Main. The sealant restoration is indicated primarily on the occlusal surfaces of permanent molars and premolars and may also be indicated for primary molars. They are most appropriate when the prepared cavity in a pit or fissure is small and discrete.

What is the most important factor in sealant retention?

Moisture contamination is the primary cause of failure of sealant retention.

What is scaling and polishing?

Scaling is a common dental procedure to remove hardened plaque called calculus which causes teeth damage and gum diseases. As this procedure may leave the teeth rough, polishing is followed to smooth them out.

Does polishing remove enamel?

Also, polishing removes the outer layer of tooth enamel, which takes a period of 3 months to rebuild the fluoride-rich layer. Hence, selective polishing is recommended. Each patient should be assessed individually for polishing of teeth. Teeth are polished only if stains are present which scaling was unable to remove.

What is polishing abrasive?

Abrasive polishing is a mechanical process to remove excess materials from the wafer surface by letting abrasives cut into the surface to be polished. Device wafers are, in a way, a typical composite material, composed of hard materials and soft materials.

Does glass ionomer need etch and bond?

Glass ionomers and resin-modified glass ionomers are unique among dental materials because they release fluoride and physically and chemically bond to tooth structure with no need for etch and prime.

Do you etch and bond for GIC?

It is recommended that a bonding adhesive be applied after acid etching chemically curing GICs in order to achieve a bond to composite resin. The light curing GIC should not be etched with phosphoric acid and is the material of choice as it is both stronger and less technique sensitive than the chemically curing GICs.

How does GIC bond to composite?

2 described bonding composite resin to GIC by etching the set GIC with phosphoric acid prior to applying resin bond. The clinical technique described by Mount3 suggests etching the initially set GIC for 15 seconds prior to placing a layer of resin bond to develop a mechanical bond between the two materials.

What are the uses of varnish?

Varnishes provide protective coatings for wooden surfaces, paintings, and various decorative objects. Varnish protects and enhances the appearance of wooden floors, interior wood paneling and trim, and furniture. The early varnishes were solutions of natural resins that are the secretions of plants.