Dental Restorative Materials Comparison

Play an AI-generated podcast conversation about this lesson

What happens when the Powder/Liquid ratio of a cement decreases?

Decrease in strength, increase in flow and solubility (correct)

No change in properties

Increase in strength, decrease in flow and solubility

Increased fluoride release

What advantage does Resin-Modified Glass Ionomer (RMGI) have over Glass Ionomer Cement (GIC)?

Higher fluoride release

Flexible working time (correct)

Rapid light curing

Increased solubility

Why should cement liners and bases be placed only on dentin?

To speed up the setting reaction

To avoid fluoride release

To ensure complete removal from cavity walls and margins (correct)

To enhance esthetics

What consideration is important when deciding on the need for a liner or base material?

Remaining dentin thickness (RDT) (C) Signup and view all the answers

What happens when the Powder/Liquid ratio of a cement increases?

Increase in strength, decrease in flow and solubility (A) Signup and view all the answers

Which cement is more suitable as a liner or luting cement rather than as a base or temporary filling material?

Glass Ionomer Cement (GIC) (D) Signup and view all the answers

Which dental material is the most rigid, tough, and durable intermediary base material?

Zinc phosphate cement (ZPC) (C) Signup and view all the answers

Which dental material has the property of being an excellent thermal insulator when used in a thickness of 1mm or more?

Zinc phosphate cement (ZPC) (D) Signup and view all the answers

Which dental material is the most irritating base material due to its acidic pH?

Zinc phosphate cement (ZPC) (A) Signup and view all the answers

Under what condition is it not recommended to place Zinc phosphate cement (ZPC)?

When remaining dentin bridge is less than 1.5 mm without an underlying protective liner (C) Signup and view all the answers

What is the main component of Zinc polycarboxylate cement (PCC) powder?

Zinc oxide (A) Signup and view all the answers

Which dental material is supplied in the form of a powder and a liquid?

Zinc polycarboxylate cement (PCC) (B) Signup and view all the answers

Which type of cement is composed of an acid-soluble fluoro-alumino-silicate glass powder and a liquid of polyacrylic acid (PAA)?

Glass ionomer cement (C) Signup and view all the answers

What is the pH of the mixed setting cement after two minutes from the start of mixing?

3.4 (B) Signup and view all the answers

Which cement is weaker than phosphoric acid?

Zinc polycarboxylate cement (D) Signup and view all the answers

Which cement has somewhat lower compressive strength than Zinc Polycarboxylate Cement (PCC)?

Glass ionomer cement (C) Signup and view all the answers

What is the setting mechanism of Resin-Modified Glass Ionomer (RMGI) cement primarily based on?

Acid-base reaction (D) Signup and view all the answers

What provides good thermal and electrical insulation in thickness not less than 1.5 mm?

Zinc polycarboxylate cement (C) Signup and view all the answers