Denture base resins Flashcards

1
Q

____ is a broad term used to describe natural or synthetic substances that form plastic materials after polymerization

A

Resin

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2
Q

_____ is a term used to designate a colorless, pungent acid

A

Acrylic

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3
Q

The main drawback of ____ was the brittleness that caused fractures to be common

A

Ceramics

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4
Q

What are the 2 denture base polymers that we have used?

A

Polymethyl methacrylate (PMMA) and Urethane dimethylacrylate (light-activated)

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5
Q

Denture base is fabricated with _____ resins

A

Polymethyl methacrylate (PMMA) resins

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6
Q

PUre _____ is a colorless, transparent solid

A

PMMA

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7
Q

_____ is supplied by the powder liquid system

A

PMMA

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8
Q

PMMA resin has:

_____ esthetic properties

A

Excellent

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9
Q

PMMA resin has:

____ strength

A

Adequate strength

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10
Q

PMMA resin has:

____ water sorption

A

Lower water sorption

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11
Q

PMMA resin has:

____ solubility

A

Low solubility

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12
Q

PMMA resin has:

_____ allergenicity

A

Non-toxic, low allergenicity

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13
Q

PMMA resin has:

____ repair

A

Easily repaired

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14
Q

Does PMMA resin reproduces detail accurately?

A

Yes

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15
Q

PMMA resin has:

____ molding and processing rechnique

A

Simple molding and processing technique

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16
Q

What is the liquid monomer of PMMA resin?

A

methyl methacrylate

17
Q

What is the powder polymer of PMMA resin?

A

polymethyl methacrylate

18
Q

What is the plasticizer of PMMA resin?

A

Dibutyl phthalate

19
Q

What is the initiator of PMMA resin?

A

Benzoyl peroxide

20
Q

What is the cross linking agent of PMMA resin liquid?

A

Glycol dmethacrylate

21
Q

What is the inhibitor for increased shelf life of PMMA resin liquid?

A

Hydroquinone

22
Q
The PMMA \_\_\_\_ is made of the following:
PMMA beads
Pigments
Plasticizer
Benzoyl peroxide
A

PMMA Powder

23
Q

What are the 3 types of acrylic resin?

A

Heat cure, chemical cure, and light cure

24
Q

___ occurs if temp rises too quickly: monomer boils out and leaves bubbles

A

Porosity

25
Q

A _____: heat at surface of resin is conducted away into investing medium, hence no porosity on surface of resin; vaporization of the monomer affects the thick areas of denture base

A

Internal porosity

26
Q

A _____: is an irregular shape located throughout the base. Caused by:
Inadequate pressure
Not enough resin in mold
Improperly mixed resin

A

Porosity

27
Q

____ are basically the same composition as the denture base resin, except for pigmentation to produce shades; highly cross-linked resins

A

Resin denture teeth

28
Q

Is there a greater degree of polymerization with heat-activated or autopolymerized?

A

Heat-activated

29
Q

Is there a better color stability with heat-activated or autopolymerized?

A

Heat-activated

30
Q

In _____ resins, an amine in the liquid reacts with the benzoyl peroxide in the powder to promote polymerization at room temperature

A

Autopolymerization resins

31
Q

The ____ resins turns orange after a few months due to the tertiary amine activator in the liquid oxidizing

A

Autopolymerization resins

32
Q

In light activated denture resins, the activator of the resin is ______

A

visible light

33
Q

In light activated denture resins, the initiator of the resin is ______

A

Camphorquinone