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D2 Fall - Fixed Prosth > 10/23: Provisional Restorations > Flashcards

10/23: Provisional Restorations Flashcards

1
Q

this is a prosthesis desigend to enhance, stabilize, and or function for a limited amount of time

A

provisional

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2
Q

do you need a provisional if you mill in the office?

A

no

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3
Q

what are the functions of a provisional?

A

prevent sensitivity
prevent drifting
ability to heal
restore function to teeth
esthetics
diagnostic evaluation

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4
Q

what are the requirements of a provisional?

A

pulpal protection
positional stability
occlusal function
abilty to clean
marginal integrity
esthetics and phonetics
strength and retention

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5
Q

what positional stabilities are we looking for?

A

proximal contacts
occlusal contacts
inter-abutment stability with a bridge

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6
Q

if a temp fell off and patient comes back, what should you expect?

A

adjust teeth

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7
Q

open proximal contacts will cause

A

food and debris impaction

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8
Q

without good occlusal contacts, you will get

A

extrusion and need more adjustment

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9
Q

if your temporary is high, what can happen?

A

loss or breakage

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10
Q

should you have contacts with lateral or protrusive movements on the posterior teeth?

A

No

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11
Q

you want the margin fit as closs to the

A

finish line

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12
Q

the emergency profile should be

A

flat or slightly concave

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13
Q

what happens if you have a rough margin?

A

plaque accumulation and gingival inflammation

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14
Q

can bleeding gums be a challenge to take impressions or seat with?

A

Yes

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15
Q

what material do we use in the clinic?

A

bisacryl

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16
Q

what is the main issue with bis-acryl?

A

very brittle

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17
Q

do you need to continually place the temporary on the tooth when making adjustments?

A

yes, cause it will shrink

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18
Q

what forms the extenal and internal portions of the interim?

A

external = putty matrix
internal = preparation

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19
Q

what are the 2 types of interim restorations?

A

external surface forms (pre-fab)
directly on tooth or indirectly on cast

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20
Q

pre-fabricated crown forms are limited to what?

A

single units

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21
Q

fre-fabricated crown forms must be lined with

A

auto-polymerizing resin

22
Q

Best when patient in your office with crown off and lost or broken tooth with not enough tooth to make a traditional matrix form

A

pre-fabricated crown form

23
Q

these can be used for singles but required for multiple units

A

custom mulded interims

24
Q

these stimulate planned restorations when used with diagnostic wax ups

A

custom molded interims

25
Q

this is an example of what technique?

A

direct

26
Q

this is an example of what technique?

A

indirect

27
Q

what technique allows you to see multiple undercuts ahead of time?

A

indirect

28
Q

what acrylic resins are commonly used?

A

PMMA
jet acrylic

29
Q

these are powder/liquid formulations

A

acrylic resins

30
Q

describe bis-acryl composite resins

A

Bis-GMA containing
chemical and light activated

31
Q

if you have inadequate polymerization in PMMA what happens?

A

poor mechanical properties

32
Q

if you have too little powder in PMMA, what happens?

A

loss of strength

33
Q

if you have too much powder in PMMA, what happens?

A

poor handling and adaptation

34
Q

benefits of PMMA?

A

good marginal fit
good strength
Polishes will
good durability

35
Q

dis-advantages of PMMA

A

high exothermic
high shrinkage
toxic monomer
low abrasion resistance

36
Q

the monomer and activator are

A

liquid

37
Q

the filler and initiator are

A

powder

38
Q

what are the dis-advantages with Bis-Acryl?

A

limited polishablility
no rubbery stage
high cost
brittleness

39
Q

TEMPsmart is an example of

A

Bis-Acryl

40
Q
A
40
Q

2 types of provisional cements

A

Zinc oxide eugenol
non-eugenolTemp bond is an example of

41
Q

Temp bond is an example of

A

zinc oxide eugenol

42
Q

what are examples of non-eugenols?

A

ultratemp
smartemp

43
Q

eugenol is a ____ for tooth

A

sedative

44
Q

eugenol can inhibit

A

resin polymerization

45
Q

is ZOE high strength?

A

no, low

46
Q

Polycarboxylate cements have

A

low strength

47
Q

glass-ionomer based cements are good because

A

longer term temporary use

47
Q

resin cements are

A

translucent

48
Q

in cementation, you mix

A

equal parts of base and catalyst

D2 Fall - Fixed Prosth (11 decks)

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