1. By product of setting reaction of condensation silicon: Water Acetone Hydrogen Ethyl alcohol 2. Which of the following property of amalgam is adversely affected by triturating with mechanical device Less tarnish resistance Working time Gloss of final mixture Hardness of final mixture 3. Hardness of which material is more than enamel: Gold Composite Amalgam Ceramic 4. role if indium in amalgam is to reduce elease of mercury during mastication to reduce formation of gamma phase to reduce release of mercury during amalgam polishing to reduce formation of gamma 2 phase 5. for a successful metal ceramic restoration both the metal and porcelain must have closely matched compressive strength coefficient of thermal expansion specific gravity solidification shrinkage 6. Addition of fillers in composite resins: Reduces strength Decreases wear resistance Decreases polymerization shrinkage Increases wettability 7. tartaric acid in GIC is added to reduce viscosity modify handling properties increase working time increase flow of material 8. which of the following is not a nobel metal osmium silver gold ruthenium 9. Nodule on the intaglio surface of a casting can be prevented by Use of a vibrator during investing of the wax pattern Wet the wax with water before investing Spraying a surfactant on the wax pattern before investing Use of die spacer 10. Any marked distortion of the casting is related to Distortion of the wax pattern Localised shrinkage Suck back porosity Improper temperature control 11. each crystal of the polycrystalline metal is termed dendrite seed grain bush 12. If multiple firing is done to opaque layer of dental porcelain, then it becomes? Cracked Too Smooth Too glazed Become more opaque 13. Cementation failure of a prosthesis cemented with Zinc Polycarboxylate occurs at: Cement tooth interface In the prosthesis itself Cement and prosthesis interface Between cement layer 14. Green shrinkage seen in : Ethyl Silicate bonded investment Gypsum Bonded investment It is seen in all types of investments Phosphate Bonded Investment 15. the working time of a phosphate investment mix can be increases by increasing the all of the above mixing time and mixing efficiency liquid /powder ratio tempperature of the mix 16. an advantage of rubber base impression material over reversible hydrocolloid material is that rubber base impression material will displace soft tissue is more accurate if saliva mucus or blood is present is significantly more accurate requires less armamentarium 17. Animal test used to check biocompatibility of dental material is all except Ame’s test buehlar test LD50 test Implantation test 18. Most recent type of denture adhesive is Salts of gontrez Natural gums Cellulose based salts Acrylic adhesives 19. which cement has the highest modulus of elasticity zinc phosphate zinc polycaroxylate glass ionomer cement zinc polyreinforced ZOE 20. According to the ADA classification for alloy systems used for metalceramic restorations, noble alloys: have a noble metal content of > 15% have a noble metal content of > 25% have a noble metal content of > 60% have a noble metal content of > 45% Loading … Question 1 of 20
