Which is the common method used to polymerise acrylic resin for dental appliances?

• UV light curing

• Heat curing

• Cold curing

• Microwave curing

• Pressure curing

How can you prevent staining on acrylic resin dentures?

• Avoiding foods and drinks that cause discoloration

• Brushing the denture regularly

• Soaking the denture in cleaner overnight

• Soaking the denture in plain water overnight

• Coating with a protective varnish

To minimise dimensional changes what do manufactures do:

• Change the powder liquid ratio

• Add inhibitor to the liquid

• Prepolymerise the denture base materials

• Decrease the amount of cross linking agent

• Avoid adding the initiator in the powder

The fundamental difference between heat activated resin and chemically activated resin is:

• Difference in temperature

• Difference in powder liquid ratio

• Production of free radicals by benzoyl peroxide

• Presence of chemical activators

• They don’t have any significant difference

What can cause crazing in acrylic resin denture?

• High polymerization temperature

• High polymerization pressure

• Low polymerization pressure

• Repeated stress application

• Improper polymer monomer mixing

The creep rate of denture base resin can be elevated by:

• Increase in temperature

• Increase in applied load

• Presence of plasticizer

• Both A&B

• All of the above

How does presence of residual monomer affect the properties of cured acrylic resin:

• It causes porosity

• It makes the material prone to breakage

• It increases the likelihood of allergic reactions

• It makes the resin rigid

• It alters the working time of resin

Chemically activated resins have decreased strength as compared to heat activated resins because of:

• Production of free radicals

• Lower degree of polymerization

• Presence of chemical activator

• More chances of developing porosity

• High pressure required for polymerization

The importance of thoroughly mixing of the powder and liquid when preparing acrylic resin is to:

• Reduce the polymerization time

• Prevent porosity and air entrapment

• Increase the working time

• Ensure uniform polymer chain length

• Provide adequate strength

Which stage defines the working time of a denture base material:

• Sandy

• Stingy

• Doughy

• Rubbery/Elastic

• Rigid