A. Unfilled acrylic plastics
B. Gold alloys
C. Porcelains
D. Zinc phosphate cements
Related Mcqs:
- 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 - Powders of dental plaster and dental stone differ mainly in____________?
A. Solubility
B. Shelf life
C. Chemical formula
D. Particle porosity - The main difference between dental stone and dental plaster is______________?
A. Chemical composition
B. Self life
C. Sharpe and size of particles
D. Solubility in water - The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
A. 19
B. 20
C. 21
D. 26 - Which of the following properties of dental materials is time dependent_______________?
A. Creep
B. Resillience
C. Elastic limit
D. Ultimate strength - Dental porcelains are crystalline materials of________________?
A. Rubber
B. Plastic
C. Organic substances
D. Glass - Which one of the following restorative materials is having coefficient of thermal expansion close to that of tooth enamel and dentin ?
A. Microfilled composite resins
B. Pure gold
C. Silver amalgam
D. Type II Glass ionomer cement - Agar impression materials differ from alginate impression materials in that the former sets by_______________?
A. Mechanical action of saliva
B. Physical change
C. Evolution
D. Chemical change - Co-efficient of thermal expansion is highest for_____________?
A. Amalgam
B. Silicate cement
C. Gold alloy
D. Acrylic resin - The ranking of tear strength from the lowest to highest of all impression materials generally is as follows_______________?
A. Hydrocolloids, silicones, polyether, polysulfide
B. Silicones, hydrocolloids, polyether, polysulfide
C. Polysulfide, hydrocolloids, silicones, polyether
D. Hydrocolloids, polyether, silicones, polysulfide
