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indirect Restoration > Quiz 2/9 Restoration of the Endodontically Treated Tooth > Flashcards

Quiz 2/9 Restoration of the Endodontically Treated Tooth Flashcards

1
Q

Leads to higher occurence of fractures in endo teeth compard to vital:

A

loss of structural integrity asoc with access prep, ie caries, existing restos

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2
Q

When to consider retreatment?

A

root canal space is grossly contaminated

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3
Q

Factors involved in longevity of resto after endo:

A

coronal leakage, recurrent caris, fractures, cuspal coverage, post type

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4
Q

Types of posts:

A

direct, indirect, tapered, parallel, textured, smooth, threaded, unthreaded

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5
Q

Factors to think about before restoration:

A

good apical seal, no sensitivity to pressure, no exudates, no apical sensitivity, no active inflammation

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6
Q

3 causes of loss of tooth structure:

A

caries, endo, previous restos

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7
Q

Foundation materials:

A

composite, amalgam

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8
Q

Cast post and core materials:

A

metal, ceramic

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9
Q

Prefab p/C materials:

A

metal, carbon files, glass fiber, ceramic post

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10
Q

4 foundation resto materials:

A

composite restoration, cast post, prefab post and malgam in distal canal, prefab post and amalgam in palatal canal

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11
Q

TF? Cemented posts are ideal for anteriors:

A

F. weaken, not reinforce

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12
Q

Do all endo treated anteriors require full coverage restos?

A

no

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13
Q

Posts not recommeded for anterior:

A

cemented, metal if itsnot ful coverage

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14
Q

A crown is needed after anterior endo when:

A

extensive loos of structure, serves as an FDP and RDP abutment

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15
Q

TF? Better prognosis for endo treated anteriors restored with a post.

A

F

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16
Q

Endo treated anteriors not crowned after obturation are lost __ times more freq than thoes crowned.

A

6

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17
Q

Endo treated posteriors req:

A

cuspal coverage (except maybe man premolars)

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18
Q

Posterior tooth that may not req cuspal coverage after endo:

A

man premolar

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19
Q

complete coverage crowns are recommended on these posterior teeth:

A

teeth w high risk of fracture (Max premolars)

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20
Q

Recommendation for posterior teeth w sig coronal tooth loss:

A

cast P/C or prefab post along with resin/amalgam foundation resto

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21
Q

posterior tooth w high risk of fracture:

A

max premolar

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22
Q

Function of post:

A

retain core in tooth w extensive loss of coronal tooth structure

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23
Q

Compicatons related to p/c

A

perforation root fracture,. placement beyond apex

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24
Q

Principles of canal prep:

A

apical seal, min enlargement, adequate post length, pos hor stop, vert antirotational slot, extension of final resto margin onto sound tooth

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25
Q

What to think about in regards to coronal tooth structure for p/c crown:

A

maximal coronal structure, enough ferrul (ortho, crown lengthening)

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26
Q

More likely to result in root fracture, short or long posts?

A

short

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27
Q

Post best for retentio:

A

parallel is better than tapered

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28
Q

Post should be this long:

A

L of clinical crown, 3/4 L of root, 1/2 L of canal, 1/2 L of root in bone

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29
Q

Keep this much GP in apex of canal:

A

3-5mm

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30
Q

TF? The larger the post diameter, the better the retention.

A

F

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31
Q

Post diameter should not exceed:

A

1/3 of xs diameter of root

32
Q

Goal of post diameter:

A

retain as much dentin as possible

33
Q

Ideal post surface texture:

A

serrated or roughened > smoth

34
Q

Luting agents most to least effective:

A

adhesive resin cement > ZOP/ GI cement > poly carboxylate

35
Q

Post is not necessary if:

A

there is more than 3-4mm of coronal tooth structure w reasnable wall thickness (Is this molars only?)

36
Q

When to use an amalgam post:

A

mostly pos, enough remaining coronal tooth structure w a circumferential cervical tooth structure

37
Q

Which root to use for cemented post (only this type) multirooted teeth:

A

widest canal

38
Q

Place post in this canal for man molars:

A

distal

39
Q

Place post in this canal for max molars:

A

palatal

40
Q

Where is the greatest stress distribution found in the post?

A

the shoulder, esp interproximaly and at the apex

41
Q

Are stresses red as the post shortens or lengthens?

A

lengthened

42
Q

Which distribute stress more evenly, parallel or tapered?

A

parallel

43
Q

Type of post that generateds the highest amt of stress at apex:

A

parallel

44
Q

Posts that distribute stress well:

A

threaded

45
Q

Issue w threaded posts:

A

can produce high stress conc during insertion and loading

46
Q

Function of cement:

A

more even stress distribution to root w less stress conc

47
Q

Where to place antirotational groove:

A

bulkiest root

48
Q

Don’t use this type of instrument to remove GP:

A

end cutting

49
Q

Instruments to use to remove GP

A

hot ndo plugger (system B), GG drill (rotary)

50
Q

System B is:

A

hot endo plugger

51
Q

How large to maket he canal when using a prefab post:

A

1-2 sizes larger than MAF

52
Q

Be aware of this when using a custom post:

A

UC’s, peroration (non-circular xs)

53
Q

Coronal walls should be this wide:

A

at least 1mm

54
Q

Create these in your coronal prep:

A

pos vertical stop and intirotational groove

55
Q

Remove this from crown:

A

internal and external UC’s, unsupported tooth structure

56
Q

Post type easiest to treat:

A

Fiber

57
Q

Stronger, ceramic and zirconia OR metal?

A

metal

58
Q

Which should be thicker, ceramic and zirconia OR metal?

A

ceramic and zirconia

59
Q

Metal posts:

A

high modulus of elasticity, rigid alloy, electrolytic action of dissimilar metals

60
Q

Fiber posts:

A

easier to retreat, less strength, stiffness, lower fracture threshold

61
Q

When to use custom made posts:

A

misaligned teeth, mandibular incisors

62
Q

Direct procedure for custom post:

A

acrylic or thermoplastic resin, no binding pattern

63
Q

Indirect procedure for custom post:

A

impression/ cast

64
Q

Resto materials that can be used for prefab post:

A

amalgam, GI, resin

65
Q

Adv’s of prefab post:

A

max conservation of tooth bc UC’s don’t need to be removed, Tx rew 1 fewer pt visit, fewere lab procedures, good resistance to fatigue test and good strength characterisitcs

66
Q

Disadv’s to prefabricated posts:

A

amalgam corrosion, microleakage of composite, hard to place rubber dam and matrix if min tooth remains

67
Q

When are custom cast P/C preferred?

A

wnen most tooth structure is lost

68
Q

Procedures for core fabrication w custom P/C:

A

direct and indirect pattern

69
Q

TF? The reline material must extend all the way down the post space.

A

F

70
Q

how does the wire enhance resistance of the provisional?

A

by engaging the apical portion oft he post sapce

71
Q

Part of interim resto for apical to cornonal:

A

reinforcing wire, autoploymerizing resin, preformed crown

72
Q

Do we etch the canal before placing resin when making a provisional after an endo tx?

A

ask/ check ?

73
Q

How to fill post space canals completely w cement:

A

lentulo rotary paste fillers or a cement tube

74
Q

Steps to cementing post:

A

coat post, inject into canal, gently seat

75
Q

Why don’t we care if there is a small cement line?

A

bc dissolution is prevent by the presence of the definitive resto

76
Q

How to remove existing post:

A

forceps, ultrasonic, post puller, trephines

77
Q

When woudl you need to remove a post?

A

to retreat, incompletely seated post

indirect Restoration (54 decks)

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