1. main advantage of zinc phosphate over GIC is increased tensile strength more biocompatibility increase compressive strength increase modulus of elasticity 2. Camouflage is a property of which ceramic? Dicor Cerec Cerastone All 3. Which of the following cannot be used for debridement of zirconia implant surface Hi grade plastic instrument Titanium coated instrument Stainless steel instrument Gold tip instrument 4. the significance of free eugenol in root canal sealer cements is an increase in cytotoxicity dimensional stability setting time strength 5. Wettability can be increased by: Reducing the internal stresses Increase in surface energy Increase in surface area Increasing the contact angle 6. Nodule on the intaglio surface of a casting can be prevented by Use of die spacer Use of a vibrator during investing of the wax pattern Spraying a surfactant on the wax pattern before investing Wet the wax with water before investing 7. the penetration of the fissure sealant into the fissures is the result of a chemical bond between the sealant and enamel is independent of the chemical composition of the enamel is not influenced by the wettability of the enamel must occur before the polymerisation of the material 8. One disadvantage of dental porcelain restorations is: radioactivity brittleness poor esthetics expansion 9. the difference between heat cured and cold cured acrylic resin is least significant with respect to the property of internal porosity color stability hardness transverse strength 10. methyl methacrylate can be activated by all of the following except tertiary amines heat sulfuric acid derivatives lead peroxide 11. the porcelain constituent that fuses at firing temperature and forms a matrix is kaolin feldspar aluminium oxide quartz 12. An impression is taken with addition silicone. What should be done before pouring the cast? Wait for sometime before pouring Mix with some flavouring agent Rinse with ketone Rinse with chloroform 13. Which material is sensitive to Sulfur contamination from latex gloves: Polyether Addition silicone Polysulfide Agar 14. Which material has least shelf life Polyether Addition silicone Condensation silicone Polysulphide 15. The process by which a casting is heated in a porcelain furnace to a temperature of 980″C to burn off any remaining impurities prior to adding porcelain is called: degassing investing pickling quenching 16. Which of the following property of amalgam is adversely affected by triturating with mechanical device Gloss of final mixture Hardness of final mixture Working time Less tarnish resistance 17. Structural durability is a? Biological phenomenon Structural phenomenon None of the above Mechanical phenomenon 18. Mercaptan are a component of: Polyether Polysulphide Condensation silicone Addition silicone 19. If multiple firing is done to opaque layer of dental porcelain, then it becomes? Too Smooth Cracked Become more opaque Too glazed 20. In hot and dry environment, alginate shrinks by Imbibition Syneresis Hysteresis Accretion Loading … Question 1 of 20
