Dental Biomaterials II Quiz

Which material is used for the denture base?

• Non-metallic

• Metallic

• Acrylic resin

• Porcelain

What are the biological requirements of acrylic resin?

• Toxic, irritant, insoluble

• Toxic, irritant, soluble

• Non-toxic, irritant, insoluble

• Non-toxic, non-irritant, insoluble

What is the purpose of the separating medium during denture processing?

• Prevent polymerization

• Facilitate flask separation

• Increase porosity

• Decrease mechanical properties

Which type of resin is recommended for very old patients with parkinsonism?

• High impact strength

• Microwavable

• Pour type

• Rapid heat cured

What is the main initiator in visible light cured resin?

• Plasticizer

• Inhibitor

• Camphorquinone

• Benzoyl peroxide

What is the main cause of crazing in denture resins?

• Residual monomer

• Chemical bonding

• Thermal conductivity

• Mechanical stresses

What is the main purpose of water sorption in dentures?

• Increase weight

• Cause porosity

• Decrease mechanical properties

• Compensate for shrinkage

Which stage is recommended for packing acrylic resin during processing?

• Sticky

• Sandy

• Dough

• Rubbery

What is the main difference between heat cured and chemical cured acrylic resin?

• Method of activation

• Polymer composition

• Curing temperature

• Monomer type

What is the role of opacifiers in acrylic resin composition?

• Increase porosity

• Simulate natural tissue appearance

• Improve mechanical properties

• Give radiopacity