Dental Impression Materials Quiz

What is the definition of an impression in dentistry?

• A positive replica of hard and soft oral structures

• A negative replica of hard and soft oral structures

• A type of dental instrument

• A type of dental treatment

What is the purpose of a cast or model in dentistry?

• To provide temporary relief for dental pain

• To record fine details of oral structures

• To extract teeth

• To clean teeth and gums

What is the function of a tray in dental impression?

• To carry the impression material into the patient's mouth

• To mix the impression material

• To store the impression material

• To clean the patient's teeth

What are the ideal requirements of impression materials in dentistry?

• Unpleasant taste, odor, and color

• Toxic and irritant

• Short shelf life

• Low strength

Which classification of impression materials is based on their setting reaction?

• Physical reaction and mechanical behavior

• Chemical reaction and use

• Rigid and elastic materials

• Primary and secondary impression

What is the composition of impression compound?

• Metal, plastic, and rubber

• Silicone, alginate, and elastomers

• Thermoplastic materials, fillers, and plasticizers

• Zinc oxide and eugenol

What is the main advantage of impression compound?

• Low viscosity for recording details

• Can be reused several times

• Easy removal from the mouth

• High dimensional stability

What is the setting reaction of zinc oxide eugenol?

• Acid base reaction to form a chelate

• Physical reaction to form a rigid material

• Chemical reaction to form an elastic material

• Thermal reaction to form a mold

What is the main disadvantage of zinc oxide eugenol?

• Can be electroplated

• Non-toxic and non-irritant

• Compatible with die and cast materials

• Non-elastic, does not give undercuts

What is the purpose of non-eugenol pastes in dentistry?

• To clean teeth and gums

• To overcome the burning sensation caused by eugenol

• To provide temporary relief for dental pain

• To extract teeth