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Composite MCQs

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17 mcqs on composite along with answers !

17 mcqs on composite along with answers !


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  • 1. COMPOSITEBy: E-Dental
  • 2. Size of monomer/resin and amount of fillercontent effects which property of composite?1.Thermal expansion2.Thermal Contraction3.Biocompatibility4.Both 1 and 25.Polymerization shrinkage1
  • 3. 2
  • 4. 3
  • 5. 4
  • 6. Silanes are considered coupling agents becausethey form a bond between :1.Resin (organic matrix) and Filler (inorganic)phases.2.Resin (organic matrix) and initiator.3.Initiator and activator to form a system.4.Both 1 and 35.None of the above5
  • 7. Beneficial properties contributed by the filler are:1.Lowering coefficient of thermal expansion2.Increased surface hardness and strength3.Lowering setting contraction/polymerizationshrinkage4.All of the above5.None of the above6
  • 8. Following resin is also called as BOWEN’sRESIN:1.TEG-DMA2.Bis GMA3.UDMA4.Unfilled acrylic resin5.Composite7
  • 9. Regarding visible light cured composite material,which initiator-activator system is correct:1.Camphorquinone - Light2.Benzoin Methyl Ether - Light3.Benzoyl Peroxide – Light4.N, N’ Dimethyl-p-Toluidine – Light5.Both 1 and 38
  • 10. Regarding MICROFILLED COMPOSITE, filler(silica) particle size range is:1.0.1 - 1 um2.0.01 - 0.1 um3.0.001 - 0.01 um4.1 - 100 um5.None of the above9
  • 11. Thickness of the resin that can be converted frommonomer to polymer under specific light curingconditions is called?1.Degree of conversion2.Configuration Factor3.Depth of cure4.Oxygen inhibited layer5.None of the above10
  • 12. Which of the following is true regarding theeffects of polymerization shrinkage :1.Break in marginal seal2.Development of stresses within composite3.Development of stresses on tooth4.All of the above5.Only 1 and 211
  • 13. Which is true about C-Factor :1.It is the ratio of Unbounded to bounded surface2.It is the ratio of Bounded to unbounded surface3.More value of C-Factor shows less stresses4.All of the above5.Only 1 and 312
  • 14. Relation between filler and COTE is:1.Increasing the filler causes increase in value of COTE2.No relation exists between filler content and COTE3.Increasing filler content causes decrease in value ofCOTE4.Decrease in filler cause decrease in COTE5.None of the above13
  • 15. A layer of resin, collagen and dentine producedafter acid etching of dentine and application ofadhesive/DBA is called:1.Resin Tags2.Smear layer3.Hybrid layer4.Oxygen inhibited layer5.Conditioned dentine14
  • 16. Some hybrid composites contain blend of threedifferent particle sizes of filler. The fillercontent/percent in these composites can be upto:1.70% by wt2.85% by wt3.75% by wt4.95% by wt5.90% by wt15
  • 17. For light activated composites, the typical rise intemperature is about:1.1-5’C2.5-15’C3.20-25’C4.10’C5.There is no rise in temperature as polymerizationis an endothermic process16
  • 18. C-Factor for class 1 cavity design is:1.0.22.0.53.54.25.017
  • 19. References:McCabe Dental MaterialsPhillips Dental MaterialsCraig’s Dental Materialswww.uhs.edu.pk