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18 Questions

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Dental Impression Trays Quiz

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Questions and Answers

Which type of material is a stock tray typically made of?

Acrylic

Shellac

Metallic (correct)

Impression compound

What is the primary function of a special tray in dentistry?

Taking primary impressions

Constructing indirect restorations

Taking secondary impressions (correct)

Fabricating dental models

What is an important requirement of ideal impression materials?

High cost

Strong odor

Low dimensional accuracy

Compatibility with die and cast materials (correct)

Which characteristic is NOT a property of ideal impression materials?

Expensive Signup and view all the answers

What type of impression material sets by chemical reaction?

Impression compound Signup and view all the answers

In what situations are rigid (inelastic) impression materials typically used?

In areas with undercuts Signup and view all the answers

What is the purpose of fillers in impression compound in dentistry?

Provide body and suitable working consistency Signup and view all the answers

What type of reaction occurs in impression compound used in dentistry?

Reversible reaction Signup and view all the answers

Why is it important for impression compound in dentistry to soften upon heating and harden upon cooling?

To facilitate the impression-taking process Signup and view all the answers

What property of impression compound is essential for tracing the borders of an acrylic special tray?

Minimum flow at mouth temperature Signup and view all the answers

How does the flow of impression compound used in dentistry compare between impression compound and tray compound?

Flow is lower in tray compound than impression compound Signup and view all the answers

Which component of impression compound primarily acts as a stabilizer and controls consistency?

Plasticizer Signup and view all the answers

What is the main characteristic of impression compound?

It is a thermoplastic impression material that softens by heat and hardens by cooling Signup and view all the answers

Which type of impression compound has a lower softening temperature?

Type I (impression compound) Signup and view all the answers

Which of the following is a use of impression compound?

Carrying other impression materials (wash impression) Signup and view all the answers

What is the physical form in which impression compound is typically presented?

As cakes, sticks, and large pieces Signup and view all the answers

What is the main difference between Type I and Type II impression compounds?

Type I has a lower softening temperature compared to Type II Signup and view all the answers

What is the primary purpose of using impression compound?

To record primary impressions for edentulous patients Signup and view all the answers