Temporisation

Question 1

Why do we use provisional resorption?

Answer 1

Prevent sensitivity of dentine

Restore occlusion, contact point and aesthetics

Assess aesthetics, occlusal scheme, response to endo/perio tx

Question 2

ideal properties for temp?

Answer 2

Mechanicals strength
Retention

Well fitting margins

Biocompatible

Aesthetics

Colour

Question 3

indications for temporary restorations?

Question 4

Intracoronal?

Answer 4

Inlays and onlays

Question 5

prefabricated?

Answer 5

Made before

Question 6

direct and indirect restoration?

Question 7

Materials for prefabricated?

Answer 7

Polycarbonate - anterior

Aluminium - posterior

Stainless steel - posterior

Pro temp crowns - posterior

Question 8

Proteomics crown?

Answer 8

Bis-acryl composites

Requires a try n and the term tooth

Then light cure for 40-60 secs

Adjust occlusion

Straight forward but may require a lot of occlusal adjustment

Question 9

aluminium preformed crown?

Answer 9

Readily adapted to the occlusion

Margins can be sharp and irritant

Poor contact points

Poor aesthetics

Metallic taste

Line with methacrylate material (trim) or dimethacrylate composites to improve fit

Question 10

Stainless steel preformed metal corn?

Answer 10

Difficult to adapt

Poor contacts, aesthetics, not commonly used

Question 11

direct techniques?

Answer 11

Silicone putty index

Alginate mp

PVC vacuum foamed splint

Self curing resins (methacrylate or bits-acrylic composites)

Question 12

Indirect technique chairside or lab?

Answer 12

Either

Question 13

When to use indirect technique?

Answer 13

More than 2 or 3 teeth being restored at once

Temporary crowns are needed for 3-4 weeks 0 good option

Question 14

steps for indirect technique?

Answer 14

Proeprario of teeth

Imp

Model cast in lab

Lab provisional corn construction

Question 15

benefits of PMMA?

Answer 15

Goo marginal fit

Good trench

Can be polished

Durable

Question 16

disadbatges of pmma?

Answer 16

High exit here

Low abrasion resistance

Free monomer toxic to pulp.oral tissues

High volume. Volumetric shrinkage - need to top up

Question 17

PMMA for direct or indirect?

Answer 17

Direct - corns made outside the mouth

Question 18

poly(vinylethylmethacrylate)?

Question 19

Most common material used?

Answer 19

Bis-acrylic composites (pro-temp)

Question 20

pro-temp properties?

Answer 20

Adequate strength

Good marginal fit

Rapid st

Granular finish but acceptable seat is

Difficult to add increments

Inferior stain resistance

Question 21

require to for temporary cement?

Answer 21

Strong enough to retain crown for a period of temporisation

Allows easy removal when required

Does not adhere to the tooth

Last 2-4 weeks

Question 22

types of cement?

Answer 22

Tempbond - fine particle zinc oxide euganol cement

TempbondNE - non-euganol cement

Question 23

when to use a non-euganol cement?

Answer 23

For resin based

Question 24

why do provisional restorations fail?

Answer 24

Occlusion factors
In appropriate tooth prep

Aesthetics

Choice of material - not strong enough

Poor margins - periodontal inflammation

Question 25

Preparation appointment?

Answer 25

Take a shade

Putty matrix for sectioning

Putty matrix imp tray and pro-temp

Burs
- long tapered fissure bur
Rugby ball
Interproximal bur
Finishing burs
Soflex discs

Biting registration paste - wax bite (heat n warm water

Imp trays (upper silicone - medium bodied and wash; lower alginate)

Question 26

imp for upper?

Answer 26

Upper silicone - medium bodied and wash

Question 27

how to take shade?

Answer 27

Teeth hydrated

Natural light