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FP > Cements > Flashcards

Cements Flashcards

1
Q

Eugenol in biochem is a

A

phenolic, and obtundunt (calms things down) and toxic if placed right on dentinal tubules.

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2
Q

bisacryl when aged

A

darkens

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3
Q

between acrylic and bisacryl

A

acrylic is tougher

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4
Q

Uses of cement include:

A 
Temporary Luting
Final Luting
Temporary Bonding
Final Bonding
Temporary Filling
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5
Q

Duration of temporary, proviisonal, permanent

A

Temporary (2 – 4 weeks)
Provisional (1 – 6 months)
Permanent (but retrievable)
Permanent (to last)

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6
Q

the ideal permanent cement

A 
Biocompatible
High Elastic Modulus
High Compressive Strength
Insoluble in Oral Environment
No Micro-leakage (Effective  Seal)
Low Film Thickness
Stable Color
Radiopaque
Cariostatic
Non-Irritating to Pulp (No Sensitivity)
Easy Clean-Up
User Friendly (Not Technique Sensitive)
Low Cost
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7
Q

Silicate glass

Al-F-Si

A

plus:
phosphoric acd = silicate cement

or

polyacrlyic acid = glass ionomer cement

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8
Q

zinc oxide

A

plus:
Eugenol = zoe (weak temporary)

phosphoric acid = zinc phosphate (old standard)

polyacrlyic acid = zing polycarboxylate

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9
Q

temporary cement ideals

A 
Biocompatible
Strong Enough to Hold for a Few Weeks
Non-Irritating to Pulp
Creates Marginal Seal
Easy Clean-Up
User Friendly
Low Cost
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10
Q

MTA

A

mineral trioxide aggregate is portland cement

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11
Q

ZOE+ Acrylic+ Eugoneol

A

IRM

Intermed resorative material or reinforced ZOE

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12
Q

EBA cement

A

ZOE + Al2O3+eugoneol+ethoxybenozoic acid

permanent cememnt only used where mech rentition is high, fairly insoluble. used for apicoectomy

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13
Q

Permanent cements

A 
Zinc Polycarboxylate
Zinc Phosphate
Glass Ionomer
Resin
Resin Modified Glass Ionomer
Polyurethane (Improv) – for Implants
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14
Q

polyurethane improv material is specifically used for

A

implants

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15
Q

film thickness

A 
A Measure of Viscosity
More an Issue with Powder/Liquid Formulations
NO Powder Remnants in Mix
~ 25 µm
~ 1” Snap-Off
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16
Q

polycarboxlate

A

Duralon

Kind to Pulp
Quite Soluble
Good Intermediate Strength, Inexpensive Cement
Easy to Mix
Not Technique Sensitive
Acidic (but Large acidic polymer molecules cannot penetrate dentinal tubules. so thats good)
Weak Chelation Bonds to Calcium Ions of Enamel & Dentin
Not Recommended for “Permanent” Use Anymore – Many Other Better Cements…
Good to Have in Your Arsenal
Almost Unlimited Shelf Life
Low Cost
Ease of Use

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17
Q

polyacrylci acid :

A

used to condition dentin

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18
Q

Duralon

A

mixed thicknly so you gotta fight that.

19
Q

zinc phosphate

A 
Long History of Successful Use
Has Been the Standard to Compare to…
Inexpensive
Excellent Compressive Strength
Very Difficult & Time Consuming to Mix
Very Technique Sensitive
Early Acidity can be Irritating to Pulp
Moderately Soluble when Mixed Properly
High Solubility when Mixed Poorly
Not Widely Used Anymore – Many Other Better Cements…

*good for gold onlay/inlay

20
Q

why mix zinc phopshate on cold glass slab?

A

Mix on Cold Glass Slab to Slow Exothermic Reaction

Mix Incrementally to Control Set and Allow for an Adequate Amount of Powder

21
Q

luting vs cementing

A

seal, join or coat (just fills the space), vs adhere

22
Q

Fuji 1

A

Fuji I – Glass Ionomer Luting & Lining

23
Q

Fuji 2

A

Fuji II – Glass Ionomer Build-Up

24
Q

Fuji plus

A

Fuji Plus – Glass Ionomer Luting

25
Q

FujiCEM

A

FujiCEM – RMGI Luting

26
Q

FujiCEM2

A

FujiCEM 2 – RMGI Luting

27
Q

Fuji 9

A

Fuji 9 – Glass Ionomer Filling

28
Q

Glass ionomer and luting

2 luting agents that form bond with tooth : glass ionomer and polycarboxylate via weak (chelation bond)

A

Sustained Fluoride Release
Less Soluble than Zinc Phosphate
Much More Soluble than Resins
Weak Dentin Bond (3 – 7 MPa)
Tooth Sensitivity! (Low molecular weight acid penetrates dentinal tubules.)
Keep tooth moist, even wet, prior to cementation
DO NOT over-dry!

29
Q

Resin cements

A

composition:

Diacrylate Resin
Silica or Glass Filler
Acidic Adhesive (Self-Adhesive Only)

30
Q

Diacrylate Resin?

A

Di =
Acrylate = Acrylic Acid
Bisphenol A-glycidyl methacrylate (BIS-GMA)
Urethane dimethacrylate (UDMA)

31
Q

Resin cements

A

types:
adhesive
self adhesive
esthtetic

also self cure or light cure

32
Q

adhesive resin

A

like c&b metabond, forms adhesive by nature. its a glue by nature.

Usually Chemical Cure
Limited Shades
Bonds to Many Surfaces
Strongest of Bonds
Good Under Metal or Other Opaque Material

C&B Metabond (Parkell)
Panavia (Kuraray)
C&B Cement (Bisco)

33
Q

adhesive rein cements

A

are bonded to tooth structure, chemical bond.

self curin
self adhesive
4 meta

34
Q

when is adhesive resins good?

A

Posts
Over-Tapered, Short &/or Otherwise Unretentive Crowns

Very Technique Sensitive
Sn Plate Au
10 Minute Full Set
Remove Excess Cement During “Rubbery” Phase
Prevent Blood &/or Saliva Contamination During Set

35
Q
  1. Self-Adhesive:
A
  • Phosphoric Acid (note: zinc phopshate has phosphric acid as does silicate glass”

“Grafted” into Resin
Neutralized as Resin Sets
No Need for Etching, Conditioning or Priming Surfaces to be Bonded
Good, Intermediate Bond Strength
Not Recommended for Veneers or Feldspathic Porcelain Bonding
Convenient and Easy to Use
Most Bond Better to Dentin than Enamel

RelyX Unicem (3M ESPE)
Maxcem Elite (Kerr)
BisCem (Bisco)
SpeedCEM (Ivoclar Vivadent
(all-cem)
36
Q

Self adhesive cements good for:

A 
Au Crowns/Inlays/Onlays
PFM Crowns
High-Strength Ceramic Crowns
	[alumina (Procera™), zirconia] 
Posts (cast metal, ceramic, fiber-reinforced resin)
Fixed Partial Dentures
37
Q
  1. Esthetic cement
A

Use with Separate Bonding Agent

Tooth Enamel is Etched with Phosphoric Acid in Preparation for Bonding

Can be Light-Cure or Dual-Cure

Use Light-Activation Whenever Possible — Dual-Cured Cements Typically have Increased Flexural Strength and Bond Strength when Activated with a Light

Wide Variety of Shades, Including Try-in Pastes

Translucent Shades may be Sensitive to Ambient Light

Very Strong Bond, Especially to Enamel

38
Q

esthetic cements

A 
calibra (dentply caulk)
relyx arc (3m espe)
variolink 2(ivoclar vivadent)
39
Q

bonding veneers we need to do what?

A

Verify Fit of Veneer
If Contaminated with Water, Rinse and Air Dry
If Contaminated with Saliva &/or Blood, Re-Etch Intaglio Surface with Phosphoric Acid for 30 Seconds
Thoroughly Rinse with Water
Air Dry
Apply Silane to Intaglio Surface of Veneer
Air Dry

40
Q

bonding veneers withh microprime when exposed dentin there or sensitvity present

A

Phosphoric Acid Etch Enamel for 15 Seconds
Thorough Rinse
Air Dry (DO NOT Desiccate!)
Apply 2 Coats of GLUMA or Microprime (Wait 60 Seconds)
Air Dry (DO NOT Desiccate!)
Mix and Apply Photobond (DO NOT Light-Cure Yet!)
Air Thin
Apply Base Shade Only to Veneer (NO Catalyst)
Place Veneer
Remove Excess, Including Flossing Interporximally
Tack Cure
Remove Excess Cured Resin
Final Cure

41
Q

self adhesive resin cements

A

Bond to tooth structure and other materials with low (5-8 MPa) to medium (8-15 MPa) bond strengths.
Although not necessary, can be used with separate bonding agents to moderately improve bond strength to tooth structure.
When light-activated, flexural strength and elastic modulus are generally higher than when only self-cured.
Are associated with less post-cementation sensitivity than traditional crown and bridge cements.
Typically exhibit a low incidence of marginal staining.

42
Q

RMGI why not use in inlay or post?

A

not to be used in inlay or post, due to its EXPANSION

43
Q

temp cements

A

Eugenol Based
Non-eugenol Based
Resin Based
Other

44
Q

zone

A

non eugenol based
possibly used if we are using acrylci (avoid softening them)

but because its non eugenol not as long as soothing for traumatic post op dental pain.

FP (11 decks)

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