Class test -2

The following inferences can be drawn from the graph:

              Addition of tartaric acid_____

• Decreases working and increases setting time

• Increases working time and decreases setting time

• Increases working time and setting time of the cement

• Increases working time with no effect on setting time

An all-ceramic veneer is to be cemented on to tooth 21. Which dental cement would be most suitable for the given case?

• Resin cement

• Resin modified glass ionomer cement

• Zinc polycarboxylate cement

• Zinc phosphate cement

Platinum is added to gold foil is to

• Decrease its coefficient of thermal expansion

• Decrease its ductility

• Increase its hardness

• Increase its polishability

Ammonia treated gold foil is called

• Cohesive gold

• Crystalline gold

• Non-cohesive gold

• Laminated gold

When a LOWER powder:liquid ratio is used for manipulation of Zinc phosphate cement, a decrease in the following property is expected

• Acidity

• Solubility

• Strength

• Setting time

The following is more likely to be seen during failure of a gold alloy crown cemented with zinc polycarboxylate cement

• Fracture withing the cement layer

• Debonding at cement - prosthesis interface

• Debonding at cement- tooth interface

• Fracture of the tooth

Compared to Biodentine, Mineral Trioxide Aggregate (MTA)

• Has better biocompatibility

• Has longer setting time

• Is easier to manipulate

• Is stronger

The cement which has obtundent effect on pulp

• Calcium hydroxide

• Glass ionomer cement

• Zinc oxide eugenol cement

• Silicate cement

Formation of dentin bridge can be seen with all materials except  

• Calcium hydoxide

• Biodentine

• Mineral Trioxide Aggregates

• Nanoionomer

Ethoxy benzoic acid is added to Zinc oxide eugenol cement to improve its

• Wettability

• Flow

• Strength

• Ease of manipulation