1) Ethoxy benzoic acid increases the strength and solubility of the cement______________? a. Zinc oxide eugenol b. Polycarboxylate cement c. Zinc phosphate cement d. Silicate cement
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2) Which cement base has the highest modulus of elasticity ? a. Zinc polycarboxylate b. Polymer reinforced ZOE cement c. Zinc phosphate d. Glass inomer cement
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3) The cavity varnish applied reduces post operative sensitivity in amalgam restoration by____________? a. Decreasing conduction of heat to pulp b. Minimize marginal leakage around restoration c. By altering the chemical composition of restoration materials d. By preventing penetration of corrosion products into the dentinal tubules
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4) The average life of silicate cement restoration is______________? a. 2 years b. 4 years c. 6 years d. 8 years
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5) All of the following are true for traditional solution liner, except_________________? a. It is not necessary in moderately deep cavities under glass ionomer restoration b. Have Film thickness of 1 – 50 microns c. Do not provide thermal or electric insulation d. Protect the pulp from reaction products leaching out of restoration
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6) Which of the following cements bonds to tooth structure, which has an anticariogenic effect, has a degree of translucency and does not irritate the pulp ? a. Polycarboxylate cement b. Resin cement c. Silicate cement d. Glass ionomer cement
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7) Which of the following characterizes the silicate cement______________? a. It is pulpal irritant b. It is highly cariogenic c. Chemically attaches to the tooth structure d. It produces thinnest film surface
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8) Which of the following cements have anti cariogenic properly________________? a. ZOE b. Calcium Hydroxide c. Zinc silicophosphate d. Zinc phosphate
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9) The principle application of zinc phosphate cement is_____________? a. In final cementation b. As temporary cementation c. As a temporary filling material d. It has less occlusal wear
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10) Which of the following cements is contraindicated in mouth breathers_______________? a. Silicate b. ASPA c. Polycarboxylate d. Zinc phosphate
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11) Percentage of zinc in ZOE cement is__________________? a. 60% b. 70% c. 80% d. 90%
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12) The main components is sillicophosphate cement________________? a. Zinc phosphate and GIC b. Silicate and GIC c. ZOE and Silicate d. Zinc phosphate and SIlicate
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13) Which component of zinc oxide-eugenol cement gives its strength ? a. Rosin b. Zinc oxide c. Zinc acetate d. Oil of cloves
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14) Which cement is irritating to the pulp ? a. Carboxylate cement b. Zinc oxide-eugenol cement c. Zinc phosphate d. Ethoxybenzoic acid
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15) The cement Which is least soluble in oral cavity______________? a. Glass ionomer b. Resin cement c. Polycarboxylate cement d. Silico-Phosphate cement
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16) Silicate cement is indicated in________________? a. Mouth breathers b. Patients with high caries index c. In the restoration of posterior tooth d. None of the above
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17) Which of the following cements is most kind to pulp ? a. Glass ionomer b. Polycarboxylate c. Silicate d. Resin cement
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18) What is the working time of zinc polyacrylate cement ? a. 1 Minutes b. 2 Minutes c. 3 Minutes d. 4 Minutes
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19) All of the following is used as accelerator in zinc oxide eugenol cement except_____________? a. Acetic acid b. Zinc acetate dehydrate c. Calcium chloride d. Bromoglycerine
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20) The tow cements which hold with the tooth are_______________? a. GIC and polycarboxylate b. GIC and ZnPO4 c. ZnPO4 and silicate d. GIC and silicate
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21) The logical explanation for the unique anticariogenic property of most silicate cements is______________? a. The reduction in enamel solubility due to fluoride uptake by enamel b. That beryllium flux is used in silicates c. That silicates show very little leakage at the margins of the restoration d. Due to the high silica content
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22) Thermal conductivity of which material is close to dentin____________? a. Amalgam b. Silicate c. Composite resin d. Cavity varnish
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23) Eugenol may be replaced in the zinc oxide eugenol cement by______________? a. Acetic acid b. Alginic acid c. Phosphoric acid d. Ortho-ethoxy acid
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24) Which is the cement with adhesive properties ? a. Zinc oxide eugenol b. Zinc polycarboxylate c. SIlicate d. Glass ionomer e. Both B & D
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25) Which of the following do polycarboxylate and GIC have in common ? a. Polysiloxane b. Phosphoric acid c. Polyacrylic acid d. Ion leachable glass
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26) Which of the following show chemical bond with enamel (Calcified tissues)______________? a. Composites b. Direct filling resins c. Polycarboxylate cements d. BIS-GMA resins in pit and fissure sealants
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27) Increased amount of powder in zinc phosphate cement mixture will cause_______________? a. Decreased strength b. Decreased film thickness c. Decreased solubility d. Increased setting time
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28) The temperature (in °F) of the mixing slab for silicate cements should be_____________? a. 55 – 65 b. 65 – 75 c. 75 – 85 d. 85 – 95
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29) Which one of the following dental cement accelerates the formation of reparative dentin ? a. Eugenol b. Calcium Hydroxide c. Zinc oxide d. Silica
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30) Fluoride rich materials include ? a. Silicate cement b. Glass ionomer cement c. Polycarboxylate cement d. All of the above
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31) Dynamic creep is the______________? a. Continuing alloying between silver-tin alloy and mercury during the life of restoration b. Deformation of set amalgam during function c. Process whereby alloy is wetted by murcury d. Spread of amalgam during packing
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32) The dental amalgam is most resistant to________________? a. Compressive stress b. Impact stress c. Shear stress d. Tensile stress
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33) According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________? a. 80 Mpa b. 140 Mpa c. 260 Mpa d. 510 Mpa
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34) Admixed high copper alloy powder contains_________________? a. 9-20% copper b. 13-20% copper c. 9-30% copper d. 13-30% copper
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35) Finishing and polishing of Amalgam make the restoration______________? a. Increase in tarnish and corrosion resistance b. Increase the marginal strength c. Decrease the tarnish and corrosion resistance d. Increased compressive strength
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36) Setting time of Amalgam is best controlled by _______________? a. Using spherical particles b. Lathe cut alloy c. Altering Hg-Alloy ratio d. Trituration time
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37) In non zinc containing dental amalgam alloy the percentage of zinc present is______________? a. Less than 0.02% b. Less than 0.1% c. Less than 0.01% d. None of the above
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38) High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________? a. Have less marginal breakdown b. Are workable at lower Hg-alloy ratio c. Have a higher ratio of tensile to compressive strength d. Have less resistance to tarnish and corrosion
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39) The largest component of amalgam alloy is_____________? a. Silver b. Tin c. Zinc d. Copper
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40) During amalgamation, trituration is done to_____________? a. Dissolve the alloy in mercury b. Coat the alloy particle with mercury c. Remove excess mercury from the amalgam d. Dissolve Hg in alloy
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