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Fixed Prosth Final > 15. Dental Cements > Flashcards

15. Dental Cements Flashcards

1
Q

What is a Dental Cement?

AKA - ____
• luting agent - A ____ material placed between tooth structure and a dental prosthesis that hardens through ____ reactions to firmly attach the prosthesis to the ____ structure.
• ____ Specific

A 
luting
viscous
chemical
tooth
substrate
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2
Q

What is Viscosity?

Relative ____ of a material High Viscosity = Maple Syrup Low Viscosity = Water
Also measures ____ to motion

A

thickness

resistance

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3
Q

What is a substrate?
DEF: a substance or layer that ____ something
•
• Dental Prostheses have several ____ • Influence choice of ____

A

underlies
substrates
practitioner

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4
Q 
Software Drives Hardware
As software gets more complex
  – accommodate
hardware must
   •
\_\_\_\_ drives the hardware changes

Non____

A

software

static

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5
Q 
In the beginning...
Solid \_\_\_\_ crowns
\_\_\_\_ crowns date back to 700 B.C.
Well Evans fitting crowns
time of Dr Evans
A

metal

gold

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6
Q

Gold Crown Preparations

Gold: Consistent \_\_\_\_ reduction
minimal taper (\_\_\_\_ degrees) Finish line is \_\_\_\_
A

circumferential
3-9
variable

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7
Q

The PFM Crown

Developed in mid
late 1950’s
First “____” crown
Maintained a ____ substrate

A

esthetic

metal

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8
Q

PFM Crown Preparation

More occlusal reduction than ____
More ____ Reduction
Taper similar to ____ crown

A

gold
axial
gold

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9
Q 
The “All’ Ceramic Crowns
\_\_\_\_
   crowns (Lava)
\_\_\_\_ (Zirconia)
\_\_\_\_
(e.Max)
A

porcelain fused to zirconia
zirconium oxide
lithium disilicate

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10
Q 
The “ALL” Ceramic Crown Preparation
\_\_\_\_ Line Angles!
\_\_\_\_/shoulder
Adequate \_\_\_\_ reduction
Adequate \_\_\_\_/ occlusal reduction
A

rounded
chamfer
axial
incisal

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11
Q

Ceramic Veneers

\_\_\_\_ Veneers (Late 80’s)
\_\_\_\_Veneers (21st century)
\_\_\_\_ Veneers (today)
A

feldspathic
e.Max
zirconia

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12
Q

Veneer Preparations
____ at gingiva
Facial reduction ~ Within ____!
Incisal Reduction ~ Adequate for ____ thickness

A

chamfer
enamel
material

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13
Q

Zinc Phosphate
____ Cement in use
____ Based
____-Acid RXN

A

oldest
water
oxide

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14
Q

Zinc Phosphate Cement

Powder:

  • ____ 90%
  • ____ 10%
  • Pigments

Liquid (conc. phosphoric acid):

  • ____ 40%
  • ____ 2.5%
  • ____ 5%
A 
ZnO
MgO
water
AlPO4
ZnPO4
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15
Q

Zinc Phosphate Properties

Yay!

  • ____
  • ____
  • high ____
  • low ____

Boo!

  • ____
  • pulpal ____
  • lack of ____ to tooth structure
  • ____ rxn
A

history
handling
compressive strength
film thickness

brittle
irritation
adhesion
exothermic

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16
Q

Glass Ionomer Cement

  • acid (polyacrylic) - ____ RXN
  • ____ / base
  • ____ - release
A

oxide
cavity liner
Fl

17
Q

Glass Ionomer Cement

Powder:

  • ____ - 29%
  • ____ - 16%
  • ____ - 5%
  • ____ - 34%

Liquid:
____ Acid - 35%
____ Acid - 5-15%
Other acids

A

SiO2
Al2O3
AlF3
CaF2

polyacrylic
tartaric

18
Q

Glass Ionomer Cement

Woohoo!

  • adheres to clean ____, enamel & alloys
  • anti-____

D’oh!

  • soluble in ____
  • poor ____ strength
  • ____
A 
dentin
cariogenic
saliva
wear
brittle
19
Q

Resin Modified Glass Ionomer Cement

  • ____ based cement
  • ____ RXN
  • variable properties
A

acrylate based

polymer-monomer

20
Q

RMGI
• ____ acid of traditional GI cement enhanced with ____ monomers
• PMA

A

polyacrylic

methacrylate

21
Q

Resin Modified Glass Ionomer Cement

Powder:
- \_\_\_\_
- \_\_\_\_ (chemical activation), OR
- \_\_\_\_ (photo)
Or both

Liquid:

  • ____ acid
  • ____ acid w/ carboxylic groups
  • methacrylic/____ monomer
A

alumnium silicate
benzoyl peroxide
camphorquinone

polyakenoic
polyacrylic
HEMA

22
Q

RMGI

Joys:

  • chemical bond to ____ (carboxylate cement - calcium ion of tooth)
  • low post-op ____, FL2-release
  • low ____

Sorrows:

  • high film ____
  • ____
  • poor ____ for tapered preps
A 
tooth structure
sensitivity
thickness
cost
retention
23
Q

“True” Resin Cement

AKA - ____ cements

peroxide + glass - ____ + ____ RXN

form a “____”

A

dimethacrylate
dimethacrylate
bisGMA
cross-linked polymer

24
Q

Resin cements

Jedis:

  • ____/strong
  • moisture resistant
  • variations in ____
  • true bond to substrate and tooth

Siths:

  • high ____
  • difficult excess clean-up
  • ____ irritation
  • bis-GMA
A

durable
film thickness
cost
pulpal

25
Q

Veneer cements

Ideal properties for the
substrate cement - is a true ____

Light (____ Initiator) vs. Dual Cure (____ Initiator)

Appropriate ____

A

resin cement
photo
amine
viscosity

Fixed Prosth Final (15 decks)

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