2951. To prevent porosity in dental porcelain it should be backed________________?
comments icon0

A. Boric oxide

B. In vacuum

C. For long period

D. Under pressure

2952. Ethoxy benzoic acid increases the strength and solubility of the cement______________?
comments icon0

A. Silicate cement

B. Zinc phosphate cement

C. Zinc oxide eugenol

D. Polycarboxylate cement

2953. Electrolyte used for plating copper dies is________________?
comments icon0

A. Copper cyanide

B. Acidic copper sulphate

C. Silver cyanide

D. Ionic copper

2954. The most commonly used accelerator in gypsum product is___________________?
comments icon0

A. Aluminium sulfate

B. Potassium fluoride

C. Potassium sulfate

D. Sodium fluoride

2955. Polycarboxylate cement is used for_____________?
comments icon0
A. Leuting

B. Die material

C. Temporary restoration

D. Permanent restoration

2957. The main purpose of adding metallic oxides in ceramic is________________?
comments icon0

A. Transparency

B. Colour matching

C. Opacity

D. None of the above

2958. The dental amalgam is most resistant to________________?
comments icon0

A. Impact stress

B. Tensile stress

C. Compressive stress

D. Shear stress

2960. All of the following are true for traditional solution liner, except_________________?
comments icon0

A. It is not necessary in moderately deep cavities under glass ionomer restoration

B. Have Film thickness of 1 50 microns

C. Protect the pulp from reaction products leaching out of restoration

D. Do not provide thermal or electric insulation

2961. Mercury is toxic because it_____________?
comments icon0

A. Inhibits hemoglobin synthesis, producing anemia

B. Binds to sulfhydryl groups

C. Complexes with hemoglobinto form methemoglobin

D. Inhibits anaerobic glycolysis

2962. Admixed high copper alloy powder contains_________________?
comments icon0

A. 9-30% copper

B. 13-20% copper

C. 13-30% copper

D. 9-20% copper
2965. The principal constituent of set silicate cement matrix is_______________?
comments icon0

A. Hydrated Aluminium phosphate

B. Hydrate Aluminosilicate gel

C. Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel

D. Hydrated Aluminium Phosphate with calcium fluoride

2966. The most toxic form of mercury is_________________?
comments icon0

A. Mercury vapour

B. Mercury sulphide

C. Methyl and ethyl mercury

D. Inorganic mercury forms

2967. Frozen slab technique of mixing zinc phosphate is used for_______________?
comments icon0

A. Temporary dressing

B. base

C. Cementing crowns

D. cementing orthodontic bands

2968. Porcelain binds to metal in PFM crown by_________________?
comments icon0

A. Metallic bind

B. Chemical bond

C. Transparency

D. B and C
2969. PH of which cement remain below 7 even after 1 month after insertion into the cavity ?
comments icon0

A. Zinc Phosphate

B. Resin cement

C. Glass Ionomer Cement

D. Silicate cement
2970. Chemical method of strengthening porcelain involves_________________?
comments icon0

A. Exchange of aluminium and sodium ions

B. Exchange of sodium and potassium ions

C. Exchange of aluminium and potassium ions

D. None of the above

2971. The effect of trituration on strength in an amalgam restoration depends on______________?
comments icon0

A. Trituration time

B. Speed of amalgamator

C. Amalgam alloy

D. All of the above
2972. Frozen slab technique is applicable to_____________?
comments icon0

A. Zinc oxide Eugenol cement

B. Resin cement

C. Glass Ionomer cement

D. Zinc phosphate cement
2974. Advantage of zinc containing amalgam is_______________?
comments icon0

A. Toxicity to pulp and dentin

B. Dimensional Stability

C. Better handling property

D. Resistance to creep

2975. The most commonly used, most biocompatible and adhesive cement is______________?
comments icon0
A. Glass ionomer

B. Zinc oxide eugenol

C. Calcium hydroxide

D. Zinc phosphate

2977. Adequate mixing of mercury is indicated by_______________?
comments icon0

A. None of the above

B. Short Mixing Time

C. Shiny Mix

D. Dry Mix

2978. Silicate cement is indicated in________________?
comments icon0

A. Mouth breathers

B. In the restoration of posterior tooth

C. Patients with high caries index

D. None of the above

2979. Machineable glass ceramic is________________?
comments icon0
A. Decor MGC

B. Cerestore

C. Infusium

D. Leucite

2980. Which of the following is correct?
comments icon0

A. Cementicles are found in periodontal ligament of order individuals

B. The small nerve fibres may or may not be myelinated and are concerned with discrement of pain

C. All of the above

D. Fibronectin helps in attachment of fibroblasts to collagen

E. The large nerve fibres are myelinated and are concerned with discerment of touch

2981. Compare to conventional amalgams, spherical amalgams_______________?
comments icon0

A. Require heavy compection forces

B. None of the above

C. Require more mercury

D. Have longer setting times

2982. The pure form of gold used in dentistry is known as___________________?
comments icon0

A. Non cohesive gold

B. Class IV casting gold

C. Cohesive gold

D. Class I casting gold

2983. White gold alloy predominantly is______________?
comments icon0

A. Gold with much of chromium

B. Gold added with calcium

C. Gold added with palladium

D. Gold with silver

2985. Myoepithelial cells are present in________________?
comments icon0

A. Striated duct

B. Serous cells

C. Intercalated & terminal duct

D. Mucous cells

2988. Which of the following is not correct ?
comments icon0
A. None of the above

B. In case of pituitary gigantis, all sinuses assume a larger volume than normal

C. Malignant lesions of maxillary sinus produce their manifestations in maxillary teeth

D. In chronic infections, the pain may mimic neuralgia of dental origin

2989. Most preferable cement for temporary restoration______________?
comments icon0
A. ZOE

B. GIC

C. Ca (OH)2

D. Zinc polycarboxylate cement

2990. Which of the following is correct?
comments icon0
A. All of the above

B. Roof of mandible contains thin, compact bone

C. Condyle contains red bone marrow

D. Articular tubercle is composed of spongy bone covered with thin compact bone

2992. The hygroscopic technique is associated with______________?
comments icon0

A. Silicate

B. Amalgam

C. Investment

D. Hydrocolloids

2993. Cavo surface angle for amalgam resoration is butt joint as____________?
comments icon0

A. Increased compressive, increased tensile strength

B. It increases compresssive and tensile strengths

C. Decreased compressive, decrease tensile strength

D. Decreased compressive, increased strength

2994. The tow cements which hold with the tooth are_______________?
comments icon0

A. ZnPO4 and silicate

B. GIC and ZnPO4

C. GIC and silicate

D. GIC and polycarboxylate
2995. The setting of zinc phosphate may be retarded by ?
comments icon0

A. Increase the addition of powder to liquid

B. Diluting the liquid with water

C. Increased in the ratio of powder to liquid

D. Decrease the addition of powder to liquid
2996. Super abrasive is________________?
comments icon0

A. Silicon arbide

B. Aluminum oxide

C. Sand

D. Diamond
2997. Which of the following acts as accelerator in Zinc oxide eugenol______________?
comments icon0
A. ZnCl2 + ZnSO2

B. Eugenol + ZnO

C. ZnCl2 + Eugenol

D. Zn(OH)2 + ZnO

2998. Co-efficient of Thermal exansion of amalgam is______________?
comments icon0

A. 14.0 a (ppm k-1)

B. 6.6 a (ppm k-1)

C. 25.0 a (ppm k-1)

D. 11.4 a (ppm k-1)

2999. Placing cast under tap water is to be avoided as______________?
comments icon0

A. H2O interferes with Crystallization of dihydrate

B. H2O inhibits polymerization of dental resin

C. Gypsum is slightly soluble in water and the surface of the cast will be eroded

D. H2O interferes with hygroscopic expansion

3000. The maximum shrinkage during firing proces in ceramic occurs in__________________?
comments icon0

A. Low Bisque stage

B. Medium Bisque stage

C. High Bisque stage

D. Fusion stage