A. Have a higher coefficient of thermal expansion than acrylic teeth:

B. Have a lower abrasion resistance than enamel

D. Should be used where the inter dental clearance is small

A. Cement tooth interface

B. Fracture of tooth or prosthesis

D. Cleavage through the cement layer

B. Calcium carbonate

C. Silica

D. Feldspar

A. Cavity varnish

B. Amalgam

D. Composite resin

A. Chemical bond to tooth structure

B. Polyacrylic acid is liquid

D. Substitution o eugenol by EBA to increase strength of cement

A. None of the above

B. 65% silver, 32% tin and 3% copper

D. 49% silver, 32% tin and 19% cooper

B. None of the above

C. Properly condensed mat gold has no voids

D. Voids can be avoided with manual condensation

B. Tin / Mercury phase

C. Silver / Mercury phase

D. Zinc / Mercury phase

B. 45-55%

C. More than 85%

D. 55-65%

B. 0.6 and 3.2

C. 0.28 and 0.98

D. 0.6 and 0.28

A. 4 Minutes

C. 2 Minutes

D. 1 Minutes

A. Plastic

B. Resin matrix

C. Rubber matrix

A. Chemically attaches to the tooth structure

B. It produces thinnest film surface

D. It is highly cariogenic

A. Direct contact with the mercury

B. None of the above

D. Ingestion of mercury

B. Heating above 700C for 30 min and quenching in water

C. Heating at 700C for 1 hour and quenching in water

D. Heating at 700C for 10 15 min and quenching in water

A. Merginal damage

C. Accelerated corrosion

D. Fracture of the restoration

B. Low compressive strength

C. High creep

D. High marginal breakdown

A. 25 lb

C. 35 pounds

D. 15 lb

A. Tarnish and corrosion

C. Increase the strength

D. Decrease condensation pressure

A. Good compressive strength

C. Lack of irritation

D. Low solubility

A. Silicon arbide

B. Aluminum oxide

C. Sand

B. Silver

C. Amalgam

D. Composite

B. Using contaminated gold foil

C. Poor finished preparation

D. Using small condenser point

A. Zinc silicophosphate cement

C. Zinc polycarboxylate cement

D. Zinc Phosphate cement

A. Lysing amalgam alloy

B. None of the above

D. Removal of excess of mercury

A. None of the above

B. In the deepest part of the restoration

D. In the centre of the restoration

A. Rate of arriving at firing temperature

B. Uniformity of particle size

C. Type of investment used

A. Tensile strength

B. High compressive strength

C. Diametral strength

A. Zinc oxide

B. Silica

C. Eugenol

A. Tin

C. Copper

D. Zinc

A. Diamond bur

C. Carbide bur

D. Stainless steel bur

A. Opacification

B. Refractive optics

C. Translucency

A. Adding a drop of oleic acid

B. Increasing mixing time

D. Cooling the slab

A. Machining

B. Slip casting

C. Heat pressing

B. Permanent restoration

C. Die material

D. Temporary restoration

B. Gamma 1 and 2

C. Gamma 1

D. No phase is eliminated

A. Are workable at lower Hg-alloy ratio

C. Have less resistance to tarnish and corrosion

D. Have a higher ratio of tensile to compressive strength

A. Dry Mix

C. Short Mixing Time

D. None of the above

A. 24 hours

B. 7 days

C. 1-2 days

A. Zinc

B. Phosphoric acid

D. None of the above

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

B. none of these

C. A short firing period at a very low temperature is preferred

B. Only water

C. Alcohol

D. Cement liquid

A. Good marginal integrity

B. High strength

C. It has less occlusal wear

A. Zinc

C. Copper

D. Silver

B. increased stresses

C. Shrinkage

D. Marginal breakdown

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

C. Spread of amalgam during packing

D. Process whereby alloy is wetted by murcury

B. 22 K

C. 10 K

D. 24 K

A. Dry corrosion

C. Wet corrosion

D. Tarnish

A. Creep

C. Corrosion

D. Tensile strength

A. Silver ionization by porcelains with high oxygen potential

C. Surface diffusion of silver from the marginal metal

D. More rapid silver diffusion in sodium containing glass