Dental Materials MCQs

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Dental Materials Mcqs for preparation. These Mcqs are helpful for Medical students. Dental Materials Multiple Choice Questions (MCQ) for entrance examinations and other competitive examinations for all Experienced, Freshers and Students.

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1.How does a material typically respond on a stress-strain curve in relation to the proportional limit?

When the stress exceeds the proportional limit, the material exhibits plastic behavior; below this limit, it behaves elastically.The material behaves elastically above the proportional limit and shows plastic behavior below it.Both statements A and B are true.Neither statement A nor B is accurate.

2.Which statement accurately describes the types of gold that can undergo heat treatment and annealing?

Only Type I and Type II gold are suitable for heat treatment and annealing.Type III and Type IV gold can be subjected to heat treatment and annealing.Heat treatment and annealing apply to Type I and Type IV gold.Every type of gold can be heat treated and annealed.None of the above.

3.Which component is found in the powder form of acrylic resin?

Methyl methacrylateBenzoyl peroxideHydroquinoneD-methyl paratoluidine

4.What is the boiling point of methyl methacrylate compared to water?

Higher than the boiling point of waterLower than the boiling point of waterThe same as the boiling point of waterOccurs at standard room temperatureNot applicable

5.What is a composite primarily made of?

ResinFiller materialBoth resin and fillerNothing

6.What is the primary benefit of using composite materials compared to unfilled direct filling resins?

Increased solubility when exposed to salivaReduced elasticity modulusSuperior aesthetic appearanceDecreased coefficient of thermal expansion

7.For which of the following applications are acrylic resins commonly utilized?

Front tooth restorationsShort-term bridgeworkBase of denturesAll the mentioned uses

8.Which method is most effective in avoiding porosity during the curing process of self-cure acrylic resin?

9.What is the primary cause of porosity found in acrylic dentures?

Extending the curing duration beyond recommended timeInadequate pressure applied during flask processingDeficiency of acrylic resin monomer in the mixAllowing the denture to cool slowly on the bench after curingUsing an incorrect polymer-to-monomer ratio

10.Which compound is responsible for cross-linking in denture base resin?

Glycol dimethacrylateBenzoyl peroxideN-para toluidineMethyl methacrylate

11.Why is hydroquinone incorporated into methyl methacrylate monomer?

To stop polymerization while the monomer is storedTo trigger the generation of free radicalsTo facilitate polymerization at ambient temperatureAll of the above

12.Which inhibitor-accelerator system relies on light activation in composite materials?

Diketone combined with amineOrganic acid paired with metal oxideOrganic acid and peroxide mixturePeroxide in combination with amine

13.Which one of the following qualifies as a composite material?

A resin reinforced with fillerSilica particles suspended in a solutionAn alloy made of goldA solidified organic substance like wax

14.What is the monomer used in heat-cured acrylic resins for denture bases?

15.What is a potential adverse effect of using a light curing system?

16.How do composite resins adhere to the tooth structure?

Through covalent bondingVia ionic interactionsBy mechanical retentionUsing Van der Waals forces

17.Which kind of spatula is appropriate for mixing composite materials?

PlasticSteel made of stainless materialIronNo applicable option

18.What is a likely consequence of adding too much monomer to an acrylic resin formulation?

Greater than normal expansionReduced resistance to impactSignificant shrinkageIncreased brittleness

19.The presence of benzoin methyl ether in a polymer suggests that it can be cured using which type of radiation?

20.What causes porosity in a denture base?

Packing during the dough phasePolymerizing at 160°F for 9 hoursApplying insufficient pressureAll of the above factors