10/23: Provisional Restorations

Question 1

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

Answer 1

provisional

Question 2

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

Answer 2

no

Question 3

what are the functions of a provisional?

Answer 3

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

Question 4

what are the requirements of a provisional?

Answer 4

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

Question 5

what positional stabilities are we looking for?

Answer 5

proximal contacts
occlusal contacts
inter-abutment stability with a bridge

Question 6

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

Answer 6

adjust teeth

Question 7

open proximal contacts will cause

Answer 7

food and debris impaction

Question 8

without good occlusal contacts, you will get

Answer 8

extrusion and need more adjustment

Question 9

if your temporary is high, what can happen?

Answer 9

loss or breakage

Question 10

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

Answer 10

No

Question 11

you want the margin fit as closs to the

Answer 11

finish line

Question 12

the emergency profile should be

Answer 12

flat or slightly concave

Question 13

what happens if you have a rough margin?

Answer 13

plaque accumulation and gingival inflammation

Question 14

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

Answer 14

Yes

Question 15

what material do we use in the clinic?

Answer 15

bisacryl

Question 16

what is the main issue with bis-acryl?

Answer 16

very brittle

Question 17

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

Answer 17

yes, cause it will shrink

Question 18

what forms the extenal and internal portions of the interim?

Answer 18

external = putty matrix
internal = preparation

Question 19

what are the 2 types of interim restorations?

Answer 19

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

Question 20

pre-fabricated crown forms are limited to what?

Answer 20

single units

Question 21

fre-fabricated crown forms must be lined with

Answer 21

auto-polymerizing resin

Question 22

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

Answer 22

pre-fabricated crown form

Question 23

these can be used for singles but required for multiple units

Answer 23

custom mulded interims

Question 24

these stimulate planned restorations when used with diagnostic wax ups

Answer 24

custom molded interims

Question 25

this is an example of what technique?

Answer 25

direct

Question 26

this is an example of what technique?

Answer 26

indirect

Question 27

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

Answer 27

indirect

Question 28

what acrylic resins are commonly used?

Answer 28

PMMA jet acrylic

Question 29

these are powder/liquid formulations

Answer 29

acrylic resins

Question 30

describe bis-acryl composite resins

Answer 30

Bis-GMA containing chemical and light activated

Question 31

if you have inadequate polymerization in PMMA what happens?

Answer 31

poor mechanical properties

Question 32

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

Answer 32

loss of strength

Question 33

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

Answer 33

poor handling and adaptation

Question 34

benefits of PMMA?

Answer 34

good marginal fit good strength Polishes will good durability

Question 35

dis-advantages of PMMA

Answer 35

high exothermic high shrinkage toxic monomer low abrasion resistance

Question 36

the monomer and activator are

Answer 36

liquid

Question 37

the filler and initiator are

Answer 37

powder

Question 38

what are the dis-advantages with Bis-Acryl?

Answer 38

limited polishablility no rubbery stage high cost brittleness

Question 39

TEMPsmart is an example of

Answer 39

Bis-Acryl

Question 40

2 types of provisional cements

Answer 40

Zinc oxide eugenol non-eugenolTemp bond is an example of

Question 41

Temp bond is an example of

Answer 41

zinc oxide eugenol

Question 42

what are examples of non-eugenols?

Answer 42

ultratemp smartemp

Question 43

eugenol is a ____ for tooth

Answer 43

sedative

Question 44

eugenol can inhibit

Answer 44

resin polymerization

Question 45

is ZOE high strength?

Answer 45

no, low

Question 46

Polycarboxylate cements have

Answer 46

low strength

Question 47

glass-ionomer based cements are good because

Answer 47

longer term temporary use

Question 47

resin cements are

Answer 47

translucent

Question 48

in cementation, you mix

Answer 48

equal parts of base and catalyst