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Dental Materials > Lecture 4 > Flashcards

Lecture 4 Flashcards

1
Q

process of attaching restorative materials via adhesion

A

Bonding

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2
Q

bonding between dissimilar material

A

Adhesion

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3
Q

bonding between similar materials

A

Cohesion

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4
Q

bonding material

A

Adhesive

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5
Q

surface that the adhesive is being bonded to

A

Adherend

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6
Q

cutting away of tooth structure

A

Undercut

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7
Q

 Seals area between tooth and restorations
 Seals dentinal tubules to prevent post-op sensitivity

A

reduction of microleakage

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8
Q

What are the steps to the bonding process?

A
  1. prepare tooth
  2. etching of enamel/dentin
  3. bonding agent/primer applied
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9
Q

What is slurry?

A

Pumice and water

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10
Q

What is the etchant?

A

phosphoric acid

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11
Q

cannot see or feel roughness that is created

A

Micromechanical

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12
Q

can see or feel roughness that is created

A

Macromechanical

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13
Q

What are the factors to a prepared tooth for etching?

A

Clean surface
No adhesion
No fluoride/prophy paste

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14
Q

increased wetting via high surface energy

A

Acid etch

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15
Q

What contamination cannot happen after acid etching?

A

Saliva

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16
Q

degradation of bonding agent from exposure to moisture

A

Hydrolysis

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17
Q

repeated stresses

A

Fatigue failure

18
Q

What type of failure is with a bonding agent?

A

Cohesive failure

19
Q

What type of failure is at interface between bonding agent and tooth structure or restoration?

A

Adhesive failure

20
Q

connect to dentin and transmit messages

A

Enamel rods

21
Q

What are the steps to enamel etching/bonding?

A
  1. clean tooth with pumice
  2. 37% phosphoric acid applied - 20 seconds
  3. rinse etchant for 10 seconds
  4. dry tooth
  5. apply bonding agent
  6. low viscosity bonding
  7. curing
  8. restorative material bonded
22
Q

layer of cut loose debris by instrumentation

A

Smear layer

23
Q

How long is dentin etched for?

A

10-15 seconds / half time of enamel

24
Q

What are the dentin etching fallacies?

A

Pulpal irritation
Composites irritated by pulp

25
Q

What do resin tags lock into for dentin bonding?

A

Dentinal tubules

26
Q

bonding adhesive and decalcified dentin

A

Hybrid layer

27
Q

Why is it important to not over dry dentin with dentin bonding?

A

Can damage dentin surface and weaken bond

28
Q

What is the most common varnish?

A

Sodium fluoride varnish

29
Q

-Reduces root sensitivity
-Caries reduction by 40%

A

Sodium fluoride varnish

30
Q

What are the contents in sodium fluoride varnish?

A

5%NaF
Carrier resin
Solvent

31
Q

Holds fluoride to tooth surface longer

A

Carrier resin

32
Q

Dissolves fluoride to liquid to be administered

33
Q

o 4-minute disposable trays
o Becoming less common

A

Gels and foams

34
Q

o FDA approved 2014
o Effective, trauma-free, inexpensive

A

Silver diamine fluoride SDF

35
Q

What are the indications for the use of SDF?

A

Active caries
Lack of access to care
Inability to tolerate treatment
Many lesions at once

36
Q

What are the contraindications of SDF?

A

Silver allergy
Ulcerations
Esthetics
Pregnancy
Stains areas of decay

37
Q

What pits & fissures would not be sealed?

38
Q

What is less viscous compared to composite?

39
Q

What is the sealant application steps?

A
  1. Clean surface with pumice
  2. Acid etch
  3. Rinse & dry
  4. Check for chalky look
  5. Apply sealant
  6. Light cure
  7. Evaluate
40
Q

What are some potential problems with sealants?

A

-Sealant comes off
-Blocked contact
-Holes/voids
-Sealant too high
-Leakage

41
Q

fluoride releasing but lower retention rate

A

Glass ionomer cements

42
Q

What are the patient considerations for sealants?

A

Age
Hygiene
Caries risk
Diet
Fluoride
Tooth type

Dental Materials (4 decks)

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