Investment Quiz

Generate an image of a dental laboratory with investment materials, wax patterns, and casting equipment, in a professional setting, showcasing the tools and techniques used in dental investment processes.

Ultimate Investment Knowledge Quiz

Test your understanding of investment materials and processes with this comprehensive quiz designed for dental professionals.

Challenge yourself and understand key concepts such as:

Investment materials and their properties
Casting techniques
Thermal and hygroscopic expansion

20 Questions5 MinutesCreated by CastingExpert32

There's several purposes of heating the investment one of them is to remove the wax by softening or burning another purpose is:

Avoid the rapid cooling of the alloy or ceramic so it can fill the place of wax significantly

We heat it just because we want the wax to be removed

Nothing of the above

The temperature of the investment should be approximately the same as the metal temperature

True

False

The requirements of investment material are/is

The investment should be capable of reproducing the shape, size and detail recorded in the wax pattern.

The investment mould should be capable of maintaining its shape and integrity at the alloy casting elevated temperatures

The investment should have a sufficiently high value of compressive strength at the casting temperature

All of the above

Is some cases we build up the porcelain directly on the die so we attend to use a die that made of

Plaster or stone

Investment

Distone

Non of the above

There are two main type of expansion that occur to the investment one of them is hygroscopic expansion

True

False

In the burnout stage the type of expansion that occur is/are

Thermal expansion

Hygroscopic expansion

Setting expansion

All of the above

Is a refractory material which adequately withstands the temperatures used during casting

Silica

Waxes

Gepsum

All of the above

To control setting time in gepsum bounded investment we attend to use

A) Silica gell

B) Powdered graphite

C) Powdered copper

D) B+C

Related to crystalline inversion

When heating the material to a degree that is less than 575 'C less dense Structure is present

A) When heating the material to a degree that is 575 'C more dense Structure is present

B) When heating the material to a degree that is more than 575 'C less dense Structure is present

C) Nothing of the above

D) B+C

The function of the gepsum in the investment mixture are

A) Aid in setting expansion

B) Work as a binder

C) Aid in Thermal expansion

D) A+B

In the case of fabricating dentures we don't have to high temperature degrees because :

A) There is no molten metal that will replace the removed wax

B) We just have to remove the wax

C) A+B

D) Non of the above

Thermal expansion is greater for the colloidal silica-mixed materials than for the water-mixed materials

True

False

The use of colloidal solution of silica instead of water for mixing with the powder has the dual effect of

Increasing setting expansion

Strengthening the set material

All of the above

Type 1 of phosphate-bonded investment is for partial dentures and other cast, removable restorations

True

False

On heating the investment prior to casting, mould enlargement occurs by

A) thermal expansion

B) inversion of the silica

C) setting expansion

D) A+B

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