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 soft deposits
B. remove excess material
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. composite, enamel, gold amalgam
C. gold, amalgam, composite, enamel
D. enamel, amalgam, gold, composite

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

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

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

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