dental materials

the goal of finishing and polishing of restorations includes
A. removal of excess material
B. the smoothing of roughened surfaces
C. ther production of better esthetics
D. all of the above

cleansing of teeth is primarily meant to
A. remove excess material
B. remove soft deposits
C. smooth roughened surfaces
D. recontour surfaces

the depth and space between cuts made by an abrasive are determined by
A. the prpertice of the abrasive
B. the properties of hte material being abraded
C. contour of the restoration
D. both a and b

which of the following represents the correct hardness ranking from hardest to softest
A. amalgam, enamel, composite, gold
B. enamel, amalgam, gold, composite
C. composite, enamel, gold amalgam
D. gold, amalgam, composite, enamel

all of the following will increase the rate of abrasion EXCEPT
A. decreased speed
B. use of more abrasive particle than the substrate
C. use of larger abrasive particle
D. increased pressure

mohs' scale ranks
a materials by their relative abrasion resistance
b. hardness of a material
c. abrasiveness of material
d. both a and b

to control the numbers of abrasive particles that contact the surface
A. the operator should increase the speed
B. the operator should use a lubricant
C. the operator should not use rotarty instruments
D. the operator should decrease the pressure

loos abrasives
A. are used on cups and brushes
B. come in various shapes
C. are safe sided
D. use sterilizable mandrels

when performing an amalgam polishing procedure, which of the following can produce the most harmful biologic effect?
A. odor
B. products of tarnish
C. airborne debris
D. heat

the substance used to preven a dentifrice from drying is called
A. alkaline peroxide
B. detergent
C. humectant
D. binder