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Fixed Pros 2020 > Final Review > Flashcards

Final Review Flashcards

1
Q

T/F Delayed cementation of fiber post resulted in higher retentive strengths in comparison to immediate cementation.

A

True

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2
Q

If a large gap exists what material should you use to cement the post?

A

-Core build up material

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3
Q

What are the most effective conditions for long term success of post endodontic restorations?

A
  • Preservation of tooth tissue
  • Ferrule
  • Adhesion
  • Good occlusion
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4
Q

What is a risk for fatigue fracture of teeth, cement, and restorative material?

A

-Nonaxial forces

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5
Q

What are the three conditions of tooth preparation?

A
  • Mechanical
  • Biological
  • Esthetic
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6
Q

What are some of the limitations of alginate?

A
  • Lacks fine detail

- Imbibition

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7
Q

How long is the recovery period for alginate?

A

10-15 minutes

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8
Q

What are the three resin cements?

A
  • Adhesive
  • Self adhesive
  • Esthetic
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9
Q

What is the resin cement with the strongest bond?

A

-Adhesive

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10
Q

T/F Esthetic has to be used with a bonding agent

A

-True

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11
Q

What is an example of a self adhesive resin cement?

A

-Rely X unicem

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12
Q

What is Rely X luting plus?

A

-RMGI

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13
Q

When don’t you want to use Rely X luting plus?

A
  • Posts

- Inlays

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14
Q

What are some of the properties of a Bis-GMA material?

A
  • Tough
  • Brittle (cautious for long span bridges)
  • Contains an oxygen inhibited layer
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15
Q

What is a main temporary material we use today?

A

-Bis-Acryl

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16
Q

What is a temporary material that is a methyl-methacrylate that has to light cure?

A

-Unifast

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17
Q

What type of matrix do you use with unifast?

A

-Alginate (don’t use the putty matrix)

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18
Q

What is the most esthetic version of zirconia?

A

-High translucent

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19
Q

What does the high trans zirconia have in it?

A

-Cubic phase

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20
Q

What is the strongest phase of zirconia?

A

-Tetragonal

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21
Q

What stabilizes the tetragonal phase of zirconia?

A
  • Yittria
  • Ceria
  • Alumina
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22
Q

What is the ideal length of the post?

A

2/3 to 3/4 of the root leaving 4-5 mm a gutta percha

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23
Q

If a tapered post where are the stresses transferred?

A

-Coronal

24
Q

If a parallel post where are the stresses transferred?

A

-Apical

25
Q

Does a longer or shorter post distribute the forces better?

A

-Longer

26
Q

Is it ok to use a green stone to adjust zirconia?

A

-No because is causes a phase transformation

27
Q

If a crack occurs in zirconia what is that known as?

A

-Transformation toughening

28
Q

What are ways that zirconia can break down? (can cause tetragonal to monoclinic phase change)

A
  • Fracture
  • Increased abrasivity
  • Low temperature aging degradation
  • Increased hydrothermal solubility
29
Q

Is it ok when preparing a build up to expose a pin?

A

-Yes

30
Q

When is it unacceptable to expose a pin?

A

-When you almost cut the pin off

31
Q

What is the first parameter you check when fitting a crown?

A

-Proximal contacts

32
Q

When you are looking for value what vision are you relying on?

A

-Scotopic (rods)

33
Q

If you error do you want to err on high or low value?

A

-High because its easier to darken it up

34
Q

Where is the best place to get the dominant Hue?

A

-Cervical third of an unrestored upper canine

35
Q

With a high speed hand piece what is important when cutting on teeth?

A
  • Keep teeth wet
  • Keep the waterports flowing (patent)
  • Don’t cut on teeth if you can’t use copious amounts of water
36
Q

Is it ok to cut dry on a tooth?

A

-Yes, on a non-vital tooth, or on a vital tooth if the rpms are very low and you keep the tooth moistened intermittently (little points of touch up)

37
Q

What is the liquid component of IRM?

A

-Eugenol (oil of cloves)

38
Q

Can you put Eugenol on a tooth with an exposure?

A

-Yes

39
Q

What do you do if you have a pinpoint pulpal exposure?

A
  • Keep the tooth moist
  • Don’t let it get contaminated
  • Do a direct pulp cap
40
Q

Do you do direct pulp caps under indirect restorations?

A

-No

41
Q

What is polyacrylic acid used in?

A
  • The liquid component of zinc poly carboxylate (tyloc)
  • Also used in a glass ionomer cement
  • Used as a conditioner liquid for GI cements
42
Q

What doesn’t polyacrylic acid cause post operative sensitivity?

A

-It is to large to get into the dentinal tubules

43
Q

What is the difference between dimension accuracy and dimensional stability?

A
  • (accuracy) material being accurate as it sets and during removal from the mouth
  • (Stability) How long it stays that way and doesn’t distort
44
Q

What is elastic recovery?

A

-Impression material ability to rebound to proper dimensions after being removed from the mouth

45
Q

What are the properties of an addition silicone (PVS)?

A

-Gives have H2 gas scavaged by palladium

46
Q

What is the by product of condensation silicones?

A

-Ethyl alcohol

47
Q

What is the most hydrophillic of all elastomers?

A

-Polyether

48
Q

What are the downsides of polyether?

A
  • Terrible taste

- Stiffest of elastomers

49
Q

Does a thin or thick biotype have more susceptibility to recession of the gingiva?

A

-Thin

50
Q

Hydrocal is used to make what?

A

-Type III

51
Q

-Densite is used to make what?

A
  • Type IV

- Type V

52
Q

How does glass ionomer adhere to tooth structure?

A

-Ionic bond between the calcium in the tooth and the carboxylate in the cement

53
Q

How does zinc polycarboxylate adhere to tooth structure?

A

-Calcium chelation

54
Q

What is the purpose of a base?

A
  • Get back to ideal prepared tooth structure

- Serve as an insulator

55
Q

Will a liner serve as an insulator?

A

-No but it does as a chemical carrier

56
Q

What is the purpose of a build up?

A

-increase connection of the tooth to the restoration

57
Q

What allows you not to use a post?

A

-Chamber retained build up

Fixed Pros 2020 (17 decks)

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