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.Management Sciences
Category: Amalgams
Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?
A. It has increased tensile and compressive strength
B. It has poor tarnish and corrosion resistance
C. It’s edge strength is greater
D. Mercury content in the final restoration is less
Creep value of which of the following is the highest ?
A. Low copper amalgam alloy
B. Admix alloy
C. Single composition alloys
D. Creep value of all the above mentioned alloys is same
High copper amalgam can be produced_____________?
A. From smooth atomized particles
B. From irregular and spherical particles
C. From lathe cut particles
D. From traditional alloy particles
According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________?
A. 80 Mpa
B. 140 Mpa
C. 260 Mpa
D. 510 Mpa
Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?
A. Accelerated corrosion
B. Fracture of the restoration
C. Merginal damage
D. All of the above
Outstanding clinical performance of dental amalgam restoration is related to its____________?
A. Compressive strength
B. Tensile strength
C. Corrosion
D. Creep
The dental amalgam is most resistant to________________?
A. Compressive stress
B. Impact stress
C. Shear stress
D. Tensile stress
Which of the following statement is true regarding lathe cut low Copper silver alloy ?
A. Requires least amount of mercury
B. Achieves high compressive strength at 1 hr.
C. Has tensile strength both at 15 minutes and 7 days is comparable to high copper, unicompositional alloys
D. Has lower cree value
Finishing and polishing of Amalgam make the restoration______________?
A. Increase in tarnish and corrosion resistance
B. Increase the marginal strength
C. Decrease the tarnish and corrosion resistance
D. Increased compressive strength
Cavo surface angle for amalgam resoration is butt joint as____________?
A. It increases compresssive and tensile strengths
B. Decreased compressive, increased strength
C. Decreased compressive, decrease tensile strength
D. Increased compressive, increased tensile strength
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