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Operative III > Glass Ionomer/Amalgam/Clinical Photos > Flashcards

Glass Ionomer/Amalgam/Clinical Photos Flashcards

1
Q

Do you use phosphoric acid to etch Glass ionomer?

A

No

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2
Q

What are the 4 components of glass ionomer?

A

Polycarboxylic acid
FAS glass
Water
Tartaric acid

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3
Q

Does the etch used for glass ionomer unplug the dentinal tubules?

A

no

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4
Q

Is the bond for glass ionomer mechanical, chemical or physical?

A

Chemical

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5
Q
  • Improved esthetics and handling characteristics
  • Complex setting reactions-classic GI acid-base reaction as
    well as a light activated resin polymerization. Some have
    an additional chemical-cure reaction and can set in the
    absence of light.
  • Fuji II LC, Vitremer Restorative Material, Ketac Nano,
    Geristore
A

Resin-Modified Glass Ionomers

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6
Q

-Polyacid-modified composite resin
(Dyract). Light-polymerized composite resin
restoratives, modified to contain ion-leachable glass
particles and anhydrous polyalkenoic acid. Have
decreased in use due to development of Type II
GI/RMGI that have more favorable characteristic.

A

Compomer

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7
Q

Relatively new resin with pre-reacted glass-
ionomer (PRG) particles. The particles are made of
fluorosilicate glass that has been reacted with
polyacrylic acid prior to being incorporated into the
resin. (Shofu Beautifil)

A

Giomer-

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8
Q

Used at a thickness of no more than
o.5mm under either an amalgam or composite
restorative material. Seals deep dentin exposed during
caries removal (Vitrebond Plus, Fuji Liner)

A

Cavity Liner-

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9
Q

Advantages
– Radio-opaque
– Adhesion
– Fluoride release
– Quick set for finishing i.e. primary molars
* Disadvantages
– Weaker than resin
– No significant improvement in characteristics or
longevity over other RMGIC

A

Type 2 reinforced restorative cements

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10
Q

Advantages
*Useful in high caries risk patients due
to fluoride release
*Adequate esthetics
*Low polymerization shrinkage
*Excellent retention
Disadvantages
*Shade matching not equal to
composite resin
*Low compressive strength
* Indications
– Non-carious cervical lesions (NCCL) and root caries
– Base to replace dentin
– Block out undercut or void- not recommended for core
build-up
– Primary dentition-small class I or class II
– Permanent dentition-open sandwich or closed sandwich
– Interim therapeutic restoration or sedative filling
* Contraindications
– Load bearing areas-Class IV, II, large I
– Areas where esthetics is extremely important

A

Type 2 reinforced restorative cements

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11
Q

Do GI need to be recharged w fluoride?

A

Yes

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12
Q

➢ Bulk fill
➢ Non-sticky, packable
➢ No polymerization shrinkage/stress
➢ Optimal marginal seal for resistance to micro-
leakage/discoloration
➢ High fluoride release
➢ High resistance to wear/erosion
➢ 8 shades- I recommend choosing one shade darker if using
on the gingival 1/3. If the tooth is A2, choose A3.5.

A

Equia Forte

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13
Q

the placing of
glass ionomer cement as an
intermediate layer between the tooth
structure and a resin based composite
restorative material; this restoration
design combines the adhesion and
fluoride-releasing nature of a glass
ionomer cement with the esthetic
quality and durability of a resin-based
composite.

A

Sandwich technique-

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14
Q

indications for _____:
When any part of the
gingival margin of the class
II or class V preparation has
been extended past the
CEJ, and no longer has a
cavo-surface of enamel

A

OPen sandwich technique

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15
Q

Do you light cure resin modified glass ionomer?

A

Yes

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16
Q

Advantages of ______
Minimizes gap formation at margin due to
shrinkage of the composite resin
Less technique sensitive than composite resin
systems
Fluoride release provides anti-cariogenic
environment
Useful for class II and class V restorations
Use in moderate and high risk for caries

A

Sandwich technique

17
Q

Advantages of _____
Minimal cavity preparation required (ART, Sealants)
Adhesion to enamel and dentin
Fluoride release, recharging, possible caries inhibition
Minimal shrinkage
Excellent marginal seal
Low solubility
Good esthetics
Excellent tissue compatibility

A

Glass ionomer

18
Q

Disadvantages of ____
Lower resistance to wear
compared to amalgam/resin
Lower bond strengths
compared to resin
Shades sometimes not ideal
for highly esthetic areas

A

Glass ionomer

19
Q

About how much mercury does amalgam have?

A

42-50%

20
Q

What are the 3 forms of mercury?

A

Organic
Elemental
Inorganic

21
Q

 Most toxic form
 Fungicides, fish, water
 When taken up by fish, bioaccumulates up the food web.
 95% GI absorption
 Lipid soluble, uniform distribution throughout body tissues
 Toxicity: neurological damage
 Most large scale poisonings, organic Hg

A

Organic mercury

22
Q

 Liquid metal
 Vaporizes easily, passes through membranes, skin, and blood brain barrier
 Little or no oral or GI absorption
 Lungs absorb vapor
 Can have toxic CNS effects with breathing lots of vapor
 Occurs through inhalation in occupational setting or mercury spills in poorly ventilated area
 Used in dentistry

A

Elemental mercury

23
Q

 Compounds used extensively in industry
 Mercuric chloride, bromide, sulfate, nitrate
 Least toxic form
3. GI absorption poor
4. Mercuric ions concentrate in kidneys, acute toxicity renal necrosis
5. Water soluble, environmental water pollution

A

Inorganic mercury

24
Q

Dental amagams and mercury vapor is ___ m ercury

A

Elemental mercury

25
Q

Who is most at risk in a dental office for mercury exposure?

A

Dental staff

26
Q

Is mercury allergy common?

A

no less than 1% of population

27
Q

 Leading anti-amalgamist
 Diagnosed “mercury toxicity” in all pts, even some without amalgam restorations
 Recommended extraction of any teeth with root canal therapy
 Lost dental license

A

Hal Huggins

28
Q

Is there any methyl mercury in dental amalgams?

A

No

29
Q

How is mercury best measured?

A

Urine

30
Q

What is the % of overall environmental mercury release that comes from dentistry?

A

<1%

31
Q

What are the 3 amalgam waste devices used in dental office?

A

Charside trap
vacuum filter
Amalgam separator

32
Q

What is the problem with central amalgam separators?

A

Prophy paste causes system clots

33
Q

For full face photos, what do you use (aperture)?

A

F8.00

34
Q

For intraoral photos, what do you use (aperture)?

A

F22

Operative III (11 decks)

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