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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