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.Management Sciences
Category: Dental Materials
Perforated impression tray are used for_______________?
A. Alginate
B. Zinc oxide-eugenol
C. Agar-agar
D. Impression compound
Torsional force is_______________?
A. Compression
B. Tensile force
C. Shear
D. Transverse bending force
The wetting of an adherent surface by an adhesive is related to________________?
A. Surface energy of the adherent
B. Surface texture of the adherent
C. Surface tension of the adherent
D. Nature of the adherent that is crystalline or amorphous
Strain is defined as_____________?
A. An applied load or force
B. A deformation resulting from an applied load
C. An external force opposing an applied load
D. An internal force opposing an applied load
Impression plaster is_____________?
A. Less compressive than alginate
B. More compressive than alginate
C. As compressive as alginate
D. More compressive than hydrocolloids
The most common coupling agents are organic silicon compound called_______________?
A. Parabane
B. Ligane
C. Silane
D. Chelane
The threshold limit value of mercury exposures is_______________?
A. mg / m3
B. 0.05 mg / m3
C. mg / m3
D. mg / m3
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 simplest alloy is a_______________?
A. Solid solution
B. Eutectic alloy
C. Peritectic allowy
D. Ternary alloy
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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