2901. The cement Which is least soluble in oral cavity______________?
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A. Polycarboxylate cement

B. Resin cement

C. Silico-Phosphate cement

D. Glass ionomer

2902. An enzyme present in saliva which causes cell wall lysis____________?
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A. Lysozhyme

B. Peroxidase

C. Hyaluronidase

D. Lactoferin

2903. Bartholins duct is the name of_______________?
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A. Parotid duct

B. Submandibular glands

C. Sublingual duct

D. Lacrimal duct

2904. Outstanding clinical performance of dental amalgam restoration is related to its____________?
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A. Corrosion

B. Compressive strength

C. Tensile strength

D. Creep

2905. Which of the following is common to both zinc eugenol cement and polycarboxylate cement?
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A. Substitution o eugenol by EBA to increase strength of cement

B. Chelation

C. Polyacrylic acid is liquid

D. Chemical bond to tooth structure

2906. Green strength with reference to plaster means_____________?
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A. Compressive strength

B. Strength of dental stone due to green colour

C. The wet strength

D. Dry strength

2907. Which of the following is not true___________?
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A. The cortical plates are thinner in maxilla than in mandible

B. They are thickest in anterior portion of jaw

C. supporting alveolar bone surrounds the alveolar bone proper and supports the socket

D. Alveolar bone proper surrounds the root and gives attachment to fibres of periodontal ligament

2908. Greening occuring when porcelains are fired on silver free alloys may be attributed to________________?
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A. Silver ionization by porcelains with high oxygen potential

B. Surface diffusion of silver from the marginal metal

C. Vaporization of silver from the walls of contaminated furnaces

D. More rapid silver diffusion in sodium containing glass

2909. PH of polycarboxylate liquid is____________?
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A. 7

B. 1.7

C. 5

D. 8

2910. Plaster of paris is mixed in________________?
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A. Metal bowl

B. Glass bowl

C. Plastic bowl

D. Rubber bowl
2911. Mucin in mucous cells usually demonstrated by______________?
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A. Mallory stain

B. Mucicarmine stain

C. H & E stain

D. PAP stain

2912. Copper content in low copper amalgam is________________?
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A. 29%

B. 19%

C. 6%

D. 12-30%

2913. In amalgam alloy which acts as oxygen scavenger_____________?
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A. Pd

B. Cu

C. Ag

D. Zn
2914. All of the following is used as accelerator in zinc oxide eugenol cement except_____________?
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A. Calcium chloride

B. Zinc acetate dehydrate

C. Acetic acid

D. Bromoglycerine
2915. The cohesive gold used as bulk filler is_____________?
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A. Spherical gold

B. Mat gold

C. Gold foll

D. Electra alloy

2916. In method of firing: A shorter firing period at a higher temperature is considered better_______________?
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A. A short firing period at a very low temperature is preferred

B. A large time period at a lower temperature is preferred

C. none of these

D. A long firing period at a very high temperature is preferred
2917. Thermal conductivity of which material is close to dentin____________?
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A. Silicate

B. Cavity varnish

C. Amalgam

D. Composite resin

2918. About zinc oxide eugenol all are true except_______________?
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A. ZnO is converted to Zn(OH)2

B. Dehydrated ZnO reacts with dehydrated eugenol

C. Water is the byproduct of reaction

D. Reaction is autocatalytic

2919. Torsional force is_______________?
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A. Transverse bending force

B. Shear

C. Tensile force

D. Compression

2920. The threshold limit value of mercury exposures is_______________?
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A. mg / m3

B. mg / m3

C. 0.05 mg / m3

D. mg / m3

2921. Which of the following is most important in strength ZOE_____________?
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A. Addition of few drops of water

B. Liquid powder ratio

C. Temperature of mixing stab

D. Speed of mixing

2922. The carat for Au foil used for restorations is_______________?
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A. 22

B. 18

C. 24

D. 20

2923. Which of the following are characteristic feature of high copper amalgam alloy ?
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A. High creep

B. Low compressive strength

C. High marginal breakdown

D. Less marginal #
2924. The main ingredient in dental plaster in_______________?
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A. Calcium sulphate dihydrate

B. Calcium anhydrate

C. Calcium phosphate

D. Calcium sulphate hemihydrate
2925. The tarnished layer of silver amalgam consists of________________?
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A. All of the above

B. Chlorides of tin

C. Sulphides of silver

D. Oxides of tin

2926. Amalgam means_____________?
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A. A metallic powder composed of silver, tin, copper and zinc

B. A metallic substances in powder or tablet from that is mixed with mercury

C. An alloy of two or more metals one of which is mercury

D. An alloy of two or more metals that have been dissolved in each other in the molten state

2927. Dynamic creep is the______________?
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A. Spread of amalgam during packing

B. Deformation of set amalgam during function

C. Process whereby alloy is wetted by murcury

D. Continuing alloying between silver-tin alloy and mercury during the life of restoration

2928. Porosity in porcelain at condensation stage depends on_________________?
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A. Number of particles

B. None of the above

C. Shape and size of particle

D. Uniform distribution of particle size

2929. Model plaster (white) used to cast study models before mixing with water, is largely composed of____________?
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A. CaO

B. CaCO3

C. (CaSO4)2-H2O

D. CaSO4-2H2O

2930. The effect of zinc oxide-eugenol on the pulp ?
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A. Is sedating

B. Is irritating

C. Has no effect

D. Encourages pulpal fibrosis

2931. Compared with dental alloys, CERAMICS show____________________?
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A. Low esthetic value

B. Susceptibility to brittle fracture

C. High ductility

D. High hardness

2932. Acid neutralizing substance in saliva_____________?
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A. NH3

B. Bicarbonate

C. Carbonate

D. Chlorides

2933. What is the most frequently used restorative material ?
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A. Silicate

B. Composite

C. Gold

D. Amalgam
2934. The cavity varnish applied reduces post operative sensitivity in amalgam restoration by____________?
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A. By preventing penetration of corrosion products into the dentinal tubules

B. By altering the chemical composition of restoration materials

C. Decreasing conduction of heat to pulp

D. Minimize marginal leakage around restoration
2935. True about myoepithelial cell______________?
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A. Structure is similar to smooth muscle and contains actin & myosin

B. The cell expel secretions by contraction

C. All of the above

D. Also known as basket cell

2936. High copper amalgam can be produced_____________?
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A. From traditional alloy particles

B. From irregular and spherical particles

C. From lathe cut particles

D. From smooth atomized particles

2937. Die is________________?
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A. Replica of whole teeth

B. Impression of whole teeth

C. Impression of single tooth

D. Replica of single tooth
2938. Which one of the following is not an objective of trituration ?
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A. Pulverize pelletes into particles to aid in attack by mercury

B. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximum

C. Achieve a workable mass of amalgam in minimum time

D. Remove oxides from powder particle surface

2939. The setting of zinc phosphate is accelerated by_____________?
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A. Increasing mixing time

B. Adding a drop of oleic acid

C. Adding a drop of water

D. Cooling the slab

2940. Quartz is Dental porcelain is______________?
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A. Strengthener

B. Binder

C. Pigment

D. Crack minimzer

2941. Dispersion of crystalline phase to strengthen ceramics results in_________________?
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A. aluminium porcelain

B. Glazed porcelain

C. dispersed porcelain

D. All of the above

2942. Flux used in dental ceramic is________________?
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A. Boric oxide

B. Kaolin

C. Silica

D. Alumina

2943. Which of the following is correct ?
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A. Sublingual gland bartholins duct mixed and predominantly mucous

B. Parotid stensons duct pure serous

C. Submandibular Whartons duct mixed and predominantly serous

D. All of the above
2944. Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?
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A. Merginal damage

B. All of the above

C. Accelerated corrosion

D. Fracture of the restoration

2945. Which of the following silver amalgam alloy have the maximum strength________________?
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A. Lathe cut

B. Admixed

C. Spherical

D. Single composition
2946. The largest component of amalgam alloy is_____________?
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A. Zinc

B. Tin

C. Silver

D. Copper

2947. Creep value of which of the following is the highest ?
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A. Admix alloy

B. Creep value of all the above mentioned alloys is same

C. Single composition alloys

D. Low copper amalgam alloy
2948. Glass ionomer cements are composed of______________?
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A. Alumino silicate powder and phosphoric acid

B. Zinc oxide powder and polyacrylate liquid

C. Aluminosillicate powder and polyacrylate

D. Zinc oxide powder and phosphoric acid

2949. Advantage of minimum mercury technique or Eames technique is all Except________________?
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A. High strength

B. Sets quickly

C. Needs no squeezing of excess mercury

D. Greater plasticity and adapts well to cavity walls
2950. What fraction of inhaled mercury vapors retained in the body ?
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A. 45-55%

B. 65-85%

C. 55-65%

D. More than 85%