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Prosth Spring 2016 > Quiz 1: Cements > Flashcards

Quiz 1: Cements Flashcards

1
Q

What are the 5 uses of cements?

A
  1. temporary luting
  2. final luting
  3. temporary bonding
  4. final bonding
  5. temporary filling
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2
Q

What is the duration of temporary cement?

A

2-4 weeks

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3
Q

what is duration of provisional cement?

A

1-6 months

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4
Q

what is the duration of permanent cement?

A

permanent but retrievable OR to last

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5
Q

Properties of ideal “permanent’ cement

A
  1. biocompatible
  2. high elastic modulus
  3. high compressive strength
  4. insoluble in oral environment
  5. no micro-leakage (effective seal)
  6. low film thickness (8-10 microns)
  7. stable color
  8. radiopaque
  9. cariostatic
  10. non-irriating to pulp (no sensitivity)
  11. easy clean up
  12. user friendly (not technique sensitive)
  13. low cost
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6
Q

Ideal Temporary cement

A
  1. biocompatible
  2. strong enough to hold for a few weeks
  3. non-irritating to pulp
  4. creates marginal seal
  5. easy clean up
  6. user friendly
  7. low cost
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7
Q

what is one of the first cements used for inflammation?

A

Antiphlogistine

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8
Q

what are some of the new cements?

A

Silicate cement: can compare with zinc phosphate. Supposedly same liquid types but powders are different. course powder sets faster than finely comminuted

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9
Q

what are two types of silicate cement?

A
  1. Schoenbeck

2. Ascher

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10
Q

Silicate glass Al-F-Si + Phosphoric Acid

A

Silicate Cement

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11
Q

Silicate Glass Al-F-Si + Polyacryclic Acid

A

Glass Ionomer Cement

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12
Q

Zinc oxide + Eugenol

A

ZOE

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13
Q

Zinc Oxide + phosphoric acid

A

zinc phosphate

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14
Q

Zinc Oxide + Polyacrycl Acid

A

Zinc polycarboxylate

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15
Q

ZOE + Acrylic Powder + Eugenol

A

IRM (intermediate restorative material)

“Reinforced ZOE”

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16
Q

ZOE + Al2O3 + Eugenol + Ethoxybenzoic Acid

A

EBA cement

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17
Q

What are the 6 permanent cements?

A
  1. Zinc polycarboxylate
  2. zinc phosphate
  3. Glass ionomer
  4. Resin
  5. RMGI
  6. Polyurethane (IMPROV)- for implants
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18
Q

Film Thickness

A
  • a measure of viscosity
  • more an issue with powder/liquid formulations
  • NO Powder remnants in mix!
  • ~25 microns
    ~ 1 inch snap off after mixing
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19
Q

In what order do permanent cements increase in compressive strenght?

A

zinc phosphate

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20
Q

What is the most radiopaque?

A

Resin > resin ionomer > polycarboxylate/zinc phostphate > glass ionomer

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21
Q

What are 2 examples of polycarboxylate?

A
  1. Tylok

2. Durelon

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22
Q

What are the characterisitics of Zinc polycarboxylate?

A
  1. kind to pulp
  2. quite soluble
  3. good intermediate strength, inexpensive cement
  4. easy to mix
  5. not technique sensitive
  6. acidic (large acidic polymer molecule cannot penetrate dentinal tubules)
  7. weak chelation bonds to calcium ions of enamel and dentin
  8. NOT RECOMMENDED for “permanent” use anymore- many other better cements
  9. good to have in your arsenal: unlimited shelf life, low cost, ease of use
  10. mix with distilled water
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23
Q

Zinc Phosphate

A

FLeck

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24
Q

Zinc Phosphate characteristics

A
  1. long history of successful use
  2. has been the standard to compare too
  3. inexpensive
  4. excellent compressive strength
  5. very difficult and time consuming to mix
  6. very technique sensitive
  7. early acidity (ph 2) can be irritating to pulp. often put copalite first to cover dentinal tubules
  8. moderately soluble when mixed properly
  9. high solubility when mixed poorly
  10. not widely used anymore- many other better cements
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25
how do you mix zinc phosphate
1. mix on cold glass slab to slow exothermic reaction | 2. mix incrementally to control set and allow for an adequate amount of powder
26
Fuji 1
Glass Ionomer Luting and Lining
27
Fuji II
Glass ionomer build up
28
Fuji Plus
Glass Ionomer luting
29
FujiCEM
RMGI luting
30
FujiCEM 2 *
RMGI luting
31
Fuji9 *
Glass Ionomer Filling
32
KETAC Cem
Glass Ionomer Luting and Lining
33
KETAC Cem Plus
Glass ionomer luting
34
Miracle Mix/ Ketac Silver/ Ketac Molar
Glass ionomer build up
35
Ketac Fil
Glass Ionomer filling material
36
Ketac Fil Plus
Glass Ionomer filling material
37
Vitrebond (plus)*
RMGI lining
38
Characteristics of Glass Ionomer Luting (KETAC Cem Plus, Fuji Plus)
1. sustained fluoride release 2. less soluble than zinc phosphate 3. much more soluble than resins 4. weak dentin bond (3-7 MPa) 5. tooth sensitivity (low molecular weight acid penetrates dentinal tubules) 6. keep tooth moist, even wet, prior to cementation 7. DO NO OVER DRY!
39
What should Silica ceramics be bonded with? | feldspathic porcelien, leucite reinforced ceramic, lithium disilicate
Bond with adhesive or esthetic resin cements using appropriate bonding agents and primers
40
What should zirconia ceramics be bonded with?
- more indications than all other ceramics b/c of high strength - cement with traditional cements or bonded with adhesive resin cements - when addition retention needed, bond with adhesive resin or dual cured esthetic resin cement * self adhesive resin offer less technique sensitivity
41
what should self adhesive resin cements be used for?
1. cast alloy (Au) crowns/inlays/onlays, bridges 2. ceramo-metal crowns, bridges (PFM) 3. high strength ceramic (ZIrconia, alumina)crowns, bridges, inlays, onlays 4. posts (cast metal, cermaic, fiber reinforced resin) 5. Fixed partial dentures
42
Self adhesive resign cements ph change
Go from ph 2 to ph 5-6. This early acidity allows it to be self etching
43
What is the composition of Resin cements?
1. diacrylate resin 2. silica or glass filler 3. acidic adhesive (self-adhesive only!)
44
What is diacrylate resin?
- Di = acrylic acid --> acylate ion --> di or poly acrylate - Acrylate = acrylic acid - Bisphenol A-Glycidyl Methacrylate (Bis-GMA) - Urethan Dimethacrylate (UDMA)
45
what is Bis-GMA
composite resin cement
46
What is an acrylic?
a synthetic resin made of polymer of acrylic acid or acrylates
47
What are the 3 classification of resin cements?
1. adhesive 2. self-adhesive 3. esthetic
48
Adhesive resin cements
- chemically cure - limited shades - bond to many surfaces - strongest of bonds - good under metal or other opaque material
49
What are examples of Adhesive resin cements
1. C&B Metabond (Parkell) 2. Panavia (Kuerary) 3. C&B Cement (Bisco)
50
C & B Metabond
- self-curing -self- adhesive - "acrylic resin technology" 4-META (methacryloyloxyethy trimellitate anhydride) - very technique sensitive - Sn Plate Au - 10 min full set - Remove excess cement during "Rubbery" Phase - Prevent blood /saliva contamination during set
51
What is C/B Metabond used for?
- Posts | - Over-tapered, short and/or otherwise unretentive crowns
52
Self Adhesive Cement
1. phosphoric acid "grafted" into resin 2. neutralized as resin sets 3. no need for ethcing , conditioning on priming surfaces to be bonded 4. good, intermediate bond strength 5. not recommended for veneers or feldspathic porcelain bonding! 6. convenient and easy to use 7. most bond better to dentin than enamel
53
What are examples of Self adhesive resin cements?
1. RelyX Unicem 2. Maxcem Elite 3. BisCem 4. SpeedCEM
54
Esthetic resin characteristics
1. use with separate bonding agent 2. tooth enamel is etched with phosphoric acid in preparation for bonding 3. can be light cure or dual cure 4. use light activation whenever possible - dual-cured cements typically have increased flexural strength and bond strength when activate with a light * have to add catalyst for dual cure 5. wide variety of shades, including try-in pastes 6. translucent shades may be sensitive to ambient light 7. very strong bond, especially to enamel
55
example of esthetic resin cements
1. Calibra (Densply) 2. RelyX ARC 3. VarioLink II
56
What do you use esthetic resin cements for?
1. Veneers (light cure ONLY) 2. lithium disilicate onlay 3. lithium disilicate crowns 4. Zirconia crowns (more translucent zirconia ONLY)
57
How do you Bond Veneers with Silane?
1. verify fit of veneer 2. if contaminate with water, rinse and air dry 3. if contaminated with saliva or blood, re-etch intaglio surface with phosphoric acid for 30 sec 4. thoroughly rinse with water 5. air dry 6. apply SILANE to intaglio surface of veneer 7. air dry
58
How to bond veneers?
1. phosphoric acid etch enamel for 15 seconds 2. thorough rinse 3. air dry (do not dessicate) 4. apply 2 coats of GLUMA or Microprime (wait 60 seconds) 5. air dry 6. mix and apply photobond (DO NOT LIGHT CURE YET) 7. air thin 8. apply base shade only ot veneer *no catalyst! 9. place veneer 10. remove excess, including flossing interproximally 11. tack cure 12. remove excess cured resin 13. final cure
59
Bonding of Self adhesive resins
1. bond to tooth structure and other materials with low (5-8 MPa) to medium (8-15 Mpa) bond strengths 2. can be used with separate bonding agents to moderately improve bond strength to tooth structure 3. when light activated, flexural strength and elastic modulus are generally higher than when only self cured 4. are associated with less post- cementation sensitivity than traditional crown /bridge cements 5. typically exhibit a low incidence of marginal staining
60
What is an example of Resin Modified Glass Ionomer
RelyX luting Plus and Fuji Cem2 *we use fuji cem 2 for cementing crowns
61
What are RMGI used for?
1. Au Crowns 2. Au Onlays 3. Lithium Disilicate crowns 4. zirconia crowns 5. PFM crowns 6. Fixed partial dentures NOT POSTS OR INLAYS!
62
What are different types of Temporary Cements?
1. Eugenol based 2. Non-eugenol based 3. resin based 4. other
63
What is an example of eugenol based?
Kerr Temp Bond
64
what is an example of non eugenol based?
Zone
65
What is an example of temp resin based?
Bis-GMA, bonds/sticks to resins | Acrylic/urethane

Prosth Spring 2016 (4 decks)

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