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dental materials > dental cements > Flashcards

dental cements Flashcards

1
Q

Are hard, brittle materials formed by mixing powder and liquid together.

A

DENTAL CEMENTS

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2
Q

PROPERTIES OF DENTAL CEMENTS: (8)

A

1.Strength
2.Solubility
3.Viscosity & Film Thickness
4.Biocompatibility
5.Anti-cariogenic Properties
6.Retention & Adhesion
7.Esthetics
8.Radiopacity

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3
Q

Strongest cement:
Weakest cement

A

resin
ZOE

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4
Q

EFFECTS of HIGH SOLUBILITY OF CEMENTS (4)

A
  1. Marginal ditching
  2. Microleakage
  3. Recurrent caries
  4. Failure of the restoration
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5
Q
  • Luting Consistency
  • Thin mix wherein cement will be able to flow easily and completely
  • 25micrometers or less (ADA)
  • String Test/ Spinnbarkeit test
A

PRIMARY CONSISTENCY

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6
Q
  • Thick putty-like consistency
  • Used as bases and restorations
  • Addition of powder increases consistency and strength, decreasing solubility
  • .75 mm or greater thickness
A

SECONDARY CONSISTENCY

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7
Q

USES OF DENTAL CEMENTS (4)

A

1.Pulpal Protection
2. Luting
3. Restorations
4. Surgical Dressings

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8
Q

RDT must be 2mm and above
to prevent pulp irritation

A

True

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9
Q
  • Acts as a protective barrier between preparation and restoration
  • is a solution of one or more resins which when applied onto the cavity walls, evaporates leaving a thin resin film, that serves as a barrier between the restoration and the dentinal tubules.
  • Prevents amalgam stains on teeth
A

CAVITY VARNISH

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10
Q
  • Low Strength Base/Liner
A

CALCIUM HYDROXIDE

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11
Q
  • GOLD STANDARD in PULP CAPPING ..(2)
A

CALCIUM HYDROXIDE
1.Stimulates reparative dentin when in direct contact with the pulp
2.Has antimicrobial and thermal insulating
Properties

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12
Q
  • Provide thermal insulation and support for restoration
  • Secondary consistency
A

HIGH STRENGTH BASE/LINER

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13
Q

material with low viscosity placed between tooth structure and prosthesis
primary consistency

A

Luting Cement

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14
Q

Stronger than luting cements.
Provide micromechanical retention between tooth, resin-based cement and restorative material

A

Bonding cements

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15
Q

RESTORATIONS (2)

A

as temporary/provisional filling
As permanent restoration (GIC &RMGIC only)

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16
Q

provide protection and support for surgical site
provide patient comfort
Help control bleeding

A

SURGICAL DRESSINGS

17
Q

DENTAL CEMENTS (6)

A

Zinc Phosphate
Zinc Polycarboxylate
Zinc Oxide Eugenol
Silicate Cement
Glass Ionomer Cement
Resin Modified-GIC

18
Q

Oldest of the cement
Not widely used today

A

Zinc Phosphate

19
Q

 first cement developed with an adhesive bond to tooth structures
Adheres to tooth structure by chelation of ca2+ in enamel and dentin by carboxyl grp of polyacrylic

A

Zinc Polycarboxylate

20
Q

Widely used , least irritating of all
Ideal for temporary restorations
Cannot be placed as liner/base when using resin-based restorations. Why?

A

Zinc Oxide Eugenol

21
Q
  • Introduced by Fletscher as an anterior esthetic filling material
  • Translucent and resembled porcelain in appearance
  • Initial esthetic was satisfactory but over a period of time, silicates degraded and stained
  • anticariogenic property is due to presence of 15%
    fluoride
  • were classed as a severe irritant to the pulp because of its low pH (acidic)
  • By the 1980s and 1990s they were gradually phased out of the market
A

Silicate Cement

22
Q

One of the most versatile cements used today

A

Glass Ionomer Cement

23
Q

Zinc Oxide Eugenol Types (4)

A

Type I Temporary cementation
Type II Permanent cementation
Type III Bases and temporary restorations
Type IV Cavity liners

24
Q

Glass Ionomer Cement Types (9; LRLPLCHAP)

A

Type 1 Luting
Type 2 Restorative
Type 3 Liner/base
Type 4 Pit & fissure sealant
Type 5 Luting for orthodontic
Type 6 Core build up
Type 7 High Fluoride releasing
Type 8 Atraumatic restorative tx
Type 9 Pediatric GIC

25
Q
  • Similar to the component of GIC + resin
     Improve bond strength, compressive and tensile strength
     Decrease solubility
     Fluoride release
    X expansion of material after setting for all ceramic restorations increasing risk of fracture
A

Resin-Modified Glass Ionomer Cement
(RMGIC)

26
Q

INSTRUMENT SETUP

A

glass mixing slab
powder
liquid
stainless steel spatula
plugger
plastic instrument

dental materials (7 decks)

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