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Caries III Flashcards

1
Q

The success of the restoration depends on … (2)

A

the operator and technique

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2
Q

The degree of restoration material collaboration determines… (4)

A
  • Possibility of isolation
  • Working times
  • Technical requirements
  • Plaque control and patient responsibility
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3
Q

When choosing restoration materials we need to think about… (5)

A
  • Technique of work / times of work
  • Adhesion
  • Resistance to occlusal forces, tension, traction, wear
  • Fluoride release
  • Polishing
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4
Q

Which restorative material was used in the past?

A

silver amalgam

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5
Q

What is amalgam?

A

-alloy with mercury as one component

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6
Q

Which restorative material is for plastic insertion Non-adhesive requires specific cavity preparation for its retention, sustentation …?

A

Silver amalgam

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7
Q

In what century is silver added to amalgam?

A

19th century

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8
Q

Who enhaned silver amalgam alloys and designs cavities that allow the restoration to be durable?

A

Black

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9
Q

Pros of silver amalgam?

A
  • biocompatibility
  • easy handling
  • low cost
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10
Q

What makes silver amalgam biocompatible? (3)

A
  • expansion coefficient
  • compressive strength
  • indissolubility
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11
Q

What are the negative properties of silver amalgam? (2)

A
  • color

- risks with bad manipulation of Hg

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12
Q

Indications of silver amalgam? (2)

A
  • when isolation was difficult

- speed was required

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13
Q

Silver amalgam contraindications? (2)

A
  • aesthetics

- allergy/intolerance

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14
Q

How many times has silver amalgam been accused of causing damage to organisms? when? (4)

A

3

  • 1830
  • 1920
  • third lasts to present day
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15
Q

What is the current legislation regarding silver amalgam? (3)

A
  • nontemporary
  • > 15yrs
  • not pregnant
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16
Q

Suspicions that mercury in amalgam is harmful to health at doses we handle is….

A

unfounded

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17
Q

What is the chemistry of polymeric materials? (3)

A
  • polymers of methacrylate monomers family
  • polymerization breaks their double bonds
  • long chains
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18
Q

Define polymeric material in relation to dentistry:

A

A filling material that adheres micromechanically to the tooth
surface, not depending on a specific cavity design

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19
Q

Polymeric materials require…?

A

a bonding process

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20
Q

Clinical success of polymeric materials depends on… (2)

A

INTERPHASE SEALING

-avoids bacterial microfiltration

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21
Q

Define adhesive:

A

A state in which two surfaces are held together by interfacial
forces based on chemical and/or mechanical mechanisms mediated by an adhesive

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22
Q

What are the two types of adhesives?

A
  1. requires previous acid etching

2. self-etching systems

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23
Q

How do you acid etch?

A

surface conditioning with orthophosphoric acid

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24
Q

What are the different types of polymeric material compositions? (4)

A
  1. Organic matrix (resin).
  2. Inorganic matrix. Filling particles.
  3. Bonding Agents (Silane)
  4. Photosensitive molecules and polymerization
    initiators
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25
Resin matrix variation?
Doesnt vary much between the different composites
26
Most resins use? (2)
- Bowens resin OR | - Bisphenol A-glycidyl methacrylate (Bis-GMA)
27
What is added to resin?
TEGMA
28
What are the benefits of using inorganic filler particles? (8)
-reduces polymerization shrinkage - improves physical properties: quartz crystals colloidal silica borosilicate crystals Ba Sr Sn
29
Classification of inorganic filler particles? (4)
by size: - microfillers - microhybrids - nanofillers
30
Fluid composites? (4)
-37-53% inorganic content Decreases mechanical properties: - less invasive restorations - base in composite restorations
31
Conventional composites? (3)
* Filler particles in major % (65-75%) * Improved mechanical properties * Indications for posterior and anterior restorations
32
What are the bulk type composites? (2)
- fluid | - conventional
33
Positive properties of inorganic polymeric materials? (5)
- biocompatible - aesthetics - low thermal conductivity - preservation of healthy tissue - dimensional stability
34
Cons of inorganic polymeric materials? (4)
- sensitivity to humidity - polymerization shrinkage - tension gaps - microfiltration
35
What is the classic glass ionomer?
Power + liquid
36
What is the glass ionomer powder?
fluoraluminosilicate powder particles
37
What is the glass ionomer liquid?
aqueous solution of polyacrylic acid
38
What is the glass ionomer's reaction?
Acid-base reaction: gelling of the material
39
What happens after the gelling of the glass ionomer? (2)
- hardening | - release of flouride (bacteriostatic properties)
40
Glass ionomer has a union between?
chemical and micromechanical union
41
Glass ionomer sensitivity to moisture? (2)
High | because water neutralizes acid
42
Glass ionomer technique?
sensible
43
Glass ionomer abrasion resistance?
low
44
What is philips classifcation?
Glass ionomers - type I: luting agents (cements) - type II: restorative materials (aesthetic, reinforced) - typeIII: cavity bases (liners)
45
Pros of glass ionomers? (5)
* Fluoride Release * Adhesion to dental tissues * Biocompatibility * Antimicrobial activity * .low marginal filtration
46
Negatives of glass ionomers? (3)
``` • Mechanical properties (bigger wear, not good resistance in class II cavities) • Hydration and water solubility • Aesthetics and polishing ```
47
What material doesnt have good resistence in class II cavities?
Glass ionomers
48
What must we do with glass ionomers? (2)
- Wait a period of time before the patient closes the mouth OR - polish with water (GI is soluble in water)
49
What is a compomer? (2)
"other category" | composite + glass ionomers
50
What is the compomer reaction?
Photochemical polymerization reaction (no acid base)
51
What does compomer need? (2)
- requires adhesive application | - resin improves its properties
52
Compomer is similar to composites except (2)
– water absorption and hydroscopic expansion | – wear
53
What are ormoceras? (3)
• ORganic MOdificated CERAmics • RARELY USED IN PAEDIATRIC DENTISTRY • Similar composition to the comPosite in which the inorganic part is replaced by organic groups.
54
What materials do we use for restos? (3)
- Silver amalgam - Composite - Glass ionomer
55
Why do we use composites in class I? (4)
* Aesthetics * Effective isolation, supragingival enamel margins (better adhesión) * Patient with good control of bacterial plaque * Hybrid composites
56
Why do we use glass ionomers in class I restorations? (
``` – Chemical setting – Powder/liquid presentation or capsules – Short setting time limits working time – Used in hypomineralization situations? – EARLY-ONSET CARIES – PARTIAL CARIES REMOVAL – -Very UPDATED USE ```
57
Which restorative material has great results in patients with bad behaviour?
- Glass ionomer
58
Which restorative material is "great" for class I cavities (better resistance of the material)
Glass ionomers
59
Why do we use composite in class II? (5)
* Good material in small, conservative cavities * Necessary dental isolation * Margins in enamel (gingival) * Previous placement of the matrix * Incremental technique
60
Why do we use glass ionomer in class II? (5)
• Less recommended in classes II • Good material in small, conservative cavities • Areas with little functional load. • Short or moderate time of temporary tooth in mouth. • Improve modified with resin (better mechanical properties)
61
What material is less recommended in class II?
Glass ionomer
62
In which class do we not use silver amalgam?
III & IV
63
Why do we use composite in class III and class IV restos? (7)
Good material in cavities of any size - Excellent aesthetics and polishing - Necessary dental isolation - Demanding technique - Margins in enamel (gingival) - Previous placement of the matrix - Incremental technique
64
Why do we use glass ionomers in class III and class IV restos? (2)
- Good material in early onset caries as disease control and/or semitemporal restoration. - Cavity base for composite restorations
65
Why do we use composites in class V? (2)
– Good material if moisture control and possibility of dental isolation – excellent aesthetics and polishing
66
Why do we use glass ionomers in class V? (3)
– Good material in early onset caries as disease control and/or semitemporal restoration. – Better control of moisture if dental isolation is difficult – Cavity base for composite restorations

Spanish Peds (9 decks)

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