dental materials

for a composite to have greater wear resistance it needs
A. to have larger filler particles
B. to have a higher filler content
C. a higher oplish
D. to be light cured

composite resins are often classified according to their
A. filler partical size
B. polishability
C. resin content
D. strength

the shortcomings of flowable composites as compared with hybrid composites include all of the following except one:
A. they wear faster
B. they are more difficult to polish
C. they shrink more when polymerized
D. they are weaker

the purpose of a silane coupling agent for composite resins is
A. to improve the bond between the filler particles and the resin matrix
B. to reduce the oxygen inhibited layer
C. to help the various layers stick together
D. to help the composite retain the color

the curing light requires repair
A. if it has not been tested
B. if a 2 mm thick piece of composite does not cure through the bottom at the recommeded exposure time
C. if it icauses a slower set of a dark color composite
D. if the light appears blue

the polymerization shrinkage of a composite
A. is cause for alarm
B. can be minimized by placing and curing a series of small increments
C. has no effect on the final restoration
D. is greater than 10% in volume

t/f all composite resorative materials appear the same on radiographs of teeth
True False

one of the advantages of glass ionomer is
A. that it has been shown to release fluoride
B. because it contains water, it does not need to have a dry field for insertion into a cavity
C. ability to finish it immediately
D. has a higher sstrength thatn composite because of glass fillers

hybrid (resin modified) glass ionomers have all of the following advantages over conventional glass ionomers except one:
A. can be finished the same appt
B. stronger
C. less sensitive to moisture when set
D. contains quartz fillers like some composites

compomer restorative materials
A. are like glass ionomers in that they do not require a separate bonding agent
B. are closer to composite resins in their makeup than to glass ionomers
C. release as much fluoride as glass ionomer materials
D. are only self cure resins