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Spanish Peds > Caries III > Flashcards

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
Q

Resin matrix variation?

A

Doesnt vary much between the different composites

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26
Q

Most resins use? (2)

A
  • Bowens resin OR

- Bisphenol A-glycidyl methacrylate (Bis-GMA)

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27
Q

What is added to resin?

A

TEGMA

28
Q

What are the benefits of using inorganic filler particles? (8)

A

-reduces polymerization shrinkage
- improves physical properties:
quartz crystals
colloidal silica
borosilicate crystals
Ba
Sr
Sn

29
Q

Classification of inorganic filler particles? (4)

A

by size:

  • microfillers
  • microhybrids
  • nanofillers
30
Q

Fluid composites? (4)

A

-37-53% inorganic content
Decreases mechanical properties:
- less invasive restorations
- base in composite restorations

31
Q

Conventional composites? (3)

A
  • Filler particles in major % (65-75%)
  • Improved mechanical properties
  • Indications for posterior and anterior restorations
32
Q

What are the bulk type composites? (2)

A
  • fluid

- conventional

33
Q

Positive properties of inorganic polymeric materials? (5)

A
  • biocompatible
  • aesthetics
  • low thermal conductivity
  • preservation of healthy tissue
  • dimensional stability
34
Q

Cons of inorganic polymeric materials? (4)

A
  • sensitivity to humidity
  • polymerization shrinkage
  • tension gaps
  • microfiltration
35
Q

What is the classic glass ionomer?

A

Power + liquid

36
Q

What is the glass ionomer powder?

A

fluoraluminosilicate powder particles

37
Q

What is the glass ionomer liquid?

A

aqueous solution of polyacrylic acid

38
Q

What is the glass ionomer’s reaction?

A

Acid-base reaction: gelling of the material

39
Q

What happens after the gelling of the glass ionomer? (2)

A
  • hardening

- release of flouride (bacteriostatic properties)

40
Q

Glass ionomer has a union between?

A

chemical and micromechanical union

41
Q

Glass ionomer sensitivity to moisture? (2)

A

High

because water neutralizes acid

42
Q

Glass ionomer technique?

A

sensible

43
Q

Glass ionomer abrasion resistance?

A

low

44
Q

What is philips classifcation?

A

Glass ionomers

  • type I: luting agents (cements)
  • type II: restorative materials (aesthetic, reinforced)
  • typeIII: cavity bases (liners)
45
Q

Pros of glass ionomers? (5)

A
  • Fluoride Release
  • Adhesion to dental tissues
  • Biocompatibility
  • Antimicrobial activity
  • .low marginal filtration
46
Q

Negatives of glass ionomers? (3)

A 
• Mechanical properties
(bigger wear, not good
resistance in class II cavities)
• Hydration and water
solubility
• Aesthetics and polishing
47
Q

What material doesnt have good resistence in class II cavities?

A

Glass ionomers

48
Q

What must we do with glass ionomers? (2)

A
  • Wait a period of time before the patient closes the mouth OR
  • polish with water (GI is soluble in water)
49
Q

What is a compomer? (2)

A

“other category”

composite + glass ionomers

50
Q

What is the compomer reaction?

A

Photochemical polymerization reaction (no acid base)

51
Q

What does compomer need? (2)

A
  • requires adhesive application

- resin improves its properties

52
Q

Compomer is similar to composites except (2)

A

– water absorption and hydroscopic expansion

– wear

53
Q

What are ormoceras? (3)

A

• ORganic MOdificated CERAmics
• RARELY USED IN PAEDIATRIC DENTISTRY
• Similar composition to the comPosite in which the inorganic
part is replaced by organic groups.

54
Q

What materials do we use for restos? (3)

A
  • Silver amalgam
  • Composite
  • Glass ionomer
55
Q

Why do we use composites in class I? (4)

A
  • Aesthetics
  • Effective isolation, supragingival enamel margins (better adhesión)
  • Patient with good control of bacterial plaque
  • Hybrid composites
56
Q

Why do we use glass ionomers in class I restorations? (

A 
– 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
Q

Which restorative material has great results in patients with bad behaviour?

A
  • Glass ionomer
58
Q

Which restorative material is “great” for class I cavities (better resistance of the material)

A

Glass ionomers

59
Q

Why do we use composite in class II? (5)

A
  • Good material in small, conservative cavities
  • Necessary dental isolation
  • Margins in enamel (gingival)
  • Previous placement of the matrix
  • Incremental technique
60
Q

Why do we use glass ionomer in class II? (5)

A

• 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
Q

What material is less recommended in class II?

A

Glass ionomer

62
Q

In which class do we not use silver amalgam?

A

III & IV

63
Q

Why do we use composite in class III and class IV restos? (7)

A

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
Q

Why do we use glass ionomers in class III and class IV restos? (2)

A
  • Good material in early onset caries as disease control
    and/or semitemporal restoration.
  • Cavity base for composite restorations
65
Q

Why do we use composites in class V? (2)

A

– Good material if moisture control and possibility of dental isolation
– excellent aesthetics and polishing

66
Q

Why do we use glass ionomers in class V? (3)

A

– 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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