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Dental Materials > Restortion > Flashcards

Restortion Flashcards

1
Q

What is the Amalgams composition?

A

silver, tin, copper, zinc set with mercury

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2
Q

Why is the Amalgam a good product?

A

Because it’s strong

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3
Q

When does dental amalgam reach the final set? why does the patient need to be careful for that period time

A

24-48 hours and because it’ll damage it

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4
Q

What is the greatest threat to dental personnel when using amalgam

A

Illation.

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5
Q

How do you mix dental amalgam

A

With the amalgamator

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6
Q

why is a pre-measured capsule the best way to dispense amounts of alloy and Mercury?

A

Consistency and safer, time consuming

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7
Q

What is a composite restoration? Why is this a good product?

A

man made, tooth colored and relatively strong

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8
Q

what is the advantage of porcelain product over a composite product?

A

Because I would choose it since it looks better composite is more like a plastic material

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9
Q

A two paste system is polymerized by what means? The single piece system is polymerized how?

A

two paste is chemical and sets by itself

Single paste needs light to cure it

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10
Q

What is a veneer crown? Describe how it looks in the mouth

A

A layer of material placed over a tooth either to improve or to protect the tooth surface from damage
They look natural in the mouth

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11
Q

What are the steps in placing amalgam?

A

capsule in the amalgamator,open capsules,put in well, amalgam carrier, plugger, burnisher, carver.

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12
Q

Define galvanic shock

A

Caused by an electrochemical circuit formed when adjacent or opposing dental restorations made of dissimilar metal alloys ( amalgam and gold) come into contact in the presence of saliva

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13
Q

Define comprehensive strength of a product

A

Push or Compress easily

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14
Q

Describe dimensional change In a product

A

When the structure changes

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15
Q

Thermal conductivity

A

Picks up heat or cold

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16
Q

Define crystallization

A

Chemical process in which crystals form a structure

17
Q

Define polymerization

A

Process of changing a simple comical into another substance that contains the same elements

18
Q

During the steps of bonding describe the process

A

volcanic ash, wash and dry, clean of with pumpis, wash and dry, etch (blue), wash and dry, then put on your primer.

19
Q

What is an amalgam?

A

Silver restoration

An alloy of mercury with another metal

20
Q

How much is in one spill, two spill, and three spill

A

400
600
800

21
Q

What are the defects of under triturated mix

A

Slow setting time
Looks dull
Difficult to work with
Poor resistance to corrosion

22
Q

Triturates

A

To mix

23
Q

Corrosion

A

Is the dissolution of materials in the mouth

24
Q

Tarnish

A

Is a reaction of metal in the mouth from saliva or foods

25
Q

Vaporizes

A

Particles of mercury scatter and float freely in the air at a relatively low room temperature

26
Q

What are the four classes of material

A

Metals (silver and gold)
Ceramics (porcelain)
Polymers (bleach trays)
Composites ( filling tooth)

27
Q

Luster

A

Bright and shinny

28
Q

Ductility

A

Can be bent without breaking

29
Q

Opacity

A

Does not transmit light

30
Q

What are the 3 basic types of forces

A

Tensile- forces that pulls an object apart
Compressive- application of force that squeezes it together
Shear-force that slides on top of an object over the bottom

31
Q

Stress

A

Force per area

32
Q

Strain

A

Change in dimension

33
Q

Elastic limit

A

Maximum stress level

34
Q

Ultimate strength

A

Before a material will break

35
Q

Fatigue

A

Repeated actions of stress

36
Q

Advantages of amalgam

A

Easily used
Limited dimensions change during hardening
Non-Corrosive characteristic
Minimal marginal leakage is limited To micro leakage

37
Q

Disadvantages for amalgam

A

Does not match tooth color
Requires a larger preparation design
Therm conductivity is high in rate
Tarnish

Dental Materials (6 decks)

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