Dental Materials MCQs

Page No. 61

The type of spatula used to mix composite is________________?


aPlastic


bStainless steel


cIron


dNone of the above


View Answer Plastic

Bonding of composite resins to tooth structure is by________________?


aMechanical


bIonic bond


cCovalent bond


dVanderval forces


View Answer Mechanical

Light cure system, side effect is____________?


aIritis


bCataract


cConjunctivitis


dRetinal damage


View Answer Retinal damage

In heat cure denture base acrylic resins the monomer is___________?


aMethacrylate


bEthylmethacrylate


cMethyl Ethyl methacrylate


dPolymethylmethacrylate


View Answer Methacrylate

Which of the following is an example of a composite material ?


aA filled resin


bColloidal silica


cGold alloy


dWax


View Answer A filled resin

Which of the following inhibitor accelerator system uses light activation composite ?


aDiketone-amine


bOrganic acid-metal oxide


cOrganic acid-peroxide


dPeroxide-amine


View Answer Diketone-amine

Hydroquinone is added to methyl methacrylate monomer_________________?


aTo prevent polymerization during storage


bTo initiate release of free radicalls


cTo enable polymerization reaction at room temperature


dAll of the above



Cross linking in denture base resin is contributed by_____________?


aGlycol dimetharylate


bBenzoyl peroxide


cN-para toluidine


dMethyl methacrylate


View Answer Glycol dimetharylate

Porosity present in a acrylic denture is usually the result of______________?


aProlonged curing cycle


bInsufficient acrylic resin monomer


cLack of sufficient pressure applied to flask


dProlonged bench cooling after curing



To prevent porosity in self-cure acrylic resin, curing should be carried in______________?


aCold water


bHot water


cUnder tap water


dUnder vacuum pressure


View Answer Under vacuum pressure

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