Prosth B1

Front 1

Pulpal protection:

1) What should a provisional be constructed out of in consideration to the pulp?
2) What should its thermal conductivity be like?
3) What kind of cements should it be compatible with?

Back 1

1) Material that doesn't exacerbate pulp
2) Low
3) Non-irritating or sedative cements

Front 2

Positional stability includes what two factors?

4 requirements for interproximal contacts?

Back 2

1) Interproximal contacts
2) Occlusion

Morphologically correct, tight (prevents mesial/distal drift), broad (follows natural emergence), smooth so it doesn't fray floss or retain bacteria/debris

Front 3

The occlusion should be functional so what three things happen?

Back 3

1) Temp functions well with opposing teeth
2) No traumatic forces caused by malocclusion
3) Maintains position - prevents supereruption of prepared tooth or the opposing dentition

Front 4

3 requirements for the good fit of a margin?

Back 4

1) Closed margins
2) No overhangs (trap food)
3) Natural emergence profile (Gingival healing + health)

Front 5

1) Temporaries fail for what reason?
2) Provisional material should be of sufficient strength to withstand?
3) What does it mean by the provisional must be retentive?

Back 5

1) Fracture of material used, coming off prematurely
2) Normal occlusal forces for the time needed
3) Adapted well to the crown prep so cementation is assisted by its inherent retentive features

Front 6

1) How are esthetics achieved with all provisionals?
2) Why should anterior temporaries be esthetically pleasing?

Back 6

1) By creating natural morphology/anatomy
2) Pleasing to patient/used as esthetic models for the final restoration

Front 7

Ease of fabrication:

1) What is required of the materials?
2) Prefabricated provisional restorations must be designed to facilitate what?
3) T or F: when it comes to ease of fabrication, it is more important than the fit of the crown

Back 7

1) Easy to use, contribute to efficiency of the process
2) Adaptation to the crown prep
3) False

Front 8

1) Prefabricated vs. custom crowns?
2) What are the different types of prefabricated crowns?

Back 8

1) Prefabricated = shell crowns. Custom crowns (and bridges) are acrylic or composite crowns made directly in the mouth using an over impression or constructed indirectly on a cast
2) STAB Celluloid - Stainless steel, tooth colored polycarbonated, aluminum, Biotemp (custom lab fabrication restoration), celluloid

Front 9

1) What is the aluminum shell crown cemented with?
2) Is it recommended and why?
3) What criteria does it not meet?

Back 9

1) ZOE or acrylic
2) No - doesn't meet all criteria
3) POPE - positional stability, occlusal function, perio health, esthetics

Front 10

Stainless steel temporary crown:

1) What is it cemented with?
2) How does it compare to aluminum shell?
3) Is it recommended and why? What criteria does it lack?

Back 10

1) Temporary cement
2) Stronger, but doesn't meet all criteria
3) POPE - positional stability, occlusal function, perio health, esthetics

Front 11

Celluloid crown:

1) What is it and what is it filled with?
2) When is it removed from the tooth?
3) What modifications usually need to be made?

Back 11

1) Clear crown form filled with acrylic (PMMA or PEMA)
2) Prior to final cure
3) Occlusal and interproximal contacts usually need to be added to compensate for thickness of shell

Front 12

Tooth colored polycarbonate crown:

1) What kind of shapes does it come in?
2) How is the right shape selected?
3) What do you do to fit it?
4) How successful is this temp?
5) What is imperative about the acrylic?

Back 12

1) All shapes
2) Interproximal contacts
3) Trim gingival margins, filled with acrylic, cure to memory stage, removed and trimmed to meet all of the criteria
4) Very successful and long lasting
5) Acrylic added to interior MUST demonstrate the proper chemical qualities or else separation will occur and failure will result

Front 13

Biotemp:

1) What is it?
2) When is it most frequently used?
3) What happens to this temp in most instances?

Back 13

1) Lab fabricated temp
2) Esthetics, multiple units, long term
3) Needs to be relined and finished, much like a polycarbonate temp

Front 14

The custom temp:

1) What materials is it made out of?
2) How is it constructed? What is it important during its fabrication?

Back 14

1) Acrylic or composite
2) Placed in impression, put on mouth, cures. DO NOT ALLOW IT TO COMPLETELY SET ON THE TOOTH. Set to memory stage, remove, allow to bench cure.

Front 15

1) 5 steps of setting that dental materials may transition through?
2) What is memory stage? What kind of consistency does it have?

Back 15

1) Final Impressions Place My Fillings - Flowable, increased viscosity, putty, memory, final set
2) When material will retain shape or rebound to shape prior to final hard set. It is "rubbery"

Front 16

****What determines whether or not a provisional will be successful in meeting all of the criteria for a temp?

Back 16

It depends on the technician doing the fabrication - whether it is the dentist, assistant, or lab tech

Front 17

PMMA used to fabricate a direct provisional crown:

1) What are the two problems with it?
2) How can more accurate temps be accomplished?

Back 17

1) High shrinkage (up to 8%), exothermic reaction
2) With indirect technique

Front 18

Acrylics:

1) Main problem with them?
2) What do you have to mix together?

Back 18

1) They smell
2) Liquid with powder

Front 19

PEMA:

1) How does it differ from PMMA?
2) What is this material used for? How can a more accurate temporary be constructed?

Back 19

1) Does not have as significant of an exothermic reaction
2) Direct temps. More accurate - indirect

Front 20

1) What are resin and resin/acrylic compounds?
2) Why are they so convenient?
3) How are most of them cured?
4) Advantages?
5) Disadvantage?
6) Names of the brands?

Back 20

1) Bisacryls
2) Syringe system
3) Chemical cured - there are some light cured components
4) Color stable, don't irritate pulp, can be repaired with flowable composites
5) WAY more expensive than methacrylates
6) Integrity, Versatemp, Maxitemp

Front 21

What are some light cured acrylic putty products on the market?

Back 21

Triad

Front 22

**1) 6 kinds of materials that can be used for impressions?
2) What is the best material to use for an impression and why? Do you place it on both sides of the tray?
3) Disadvantage of using putty?
4) Why do we trim the overimpression? What is the most critical thing to trim off and why?
5) Where do you place a bevel?

Back 22

1) PAST PW - PVS putty, Alginate, Suck down vacuum stint, Temp Tab, PVS heavy body in a sideless triple tray, Wax
2) PVS heavy body or medium body in a sideless triple tray - easy to orient on the tooth, patient "holds" the impression for you while taking impression - place only on ONE side of the tray
4) To get rid of excess that might hinder putting it back in the mouth. Most critical: interproximal "fins", so impression will reseat, and to get a good contact
5) 360 degrees to allow increased temp material at the margin
3) You have to hold it in place

Front 23

Process of preparing a crown?

Back 23

1) Take overimpression
2) Trim overimpression
3) Prep crown and take final impression
4) Add resin to overimpression, make temp

Front 24

Step 3 - preparing the crown and taking the final impression:

1) What do you do with the first cord in a two cord retraction technique?

Back 24

1) Leave the first cord in place after the final impression if it isn't removed with the impression

Front 25

Step 4 - making the temp

How do you do it? What should you be careful to avoid? What stage do you want to remove the impression at?

Back 25

Add resin to overimpression, slightly overfill. Avoid bubbles/voids. Remove at memory stage.

Front 26

1) How do you know when you're at memory stage?
2) What should you do if the resin comes off in the impression?
3) What is the best purchase point for an instrument to remove a temp on a tooth?
4) What do you need to wipe off of a bisacryl? What does it get rid of?
5) How does bisacryl cut compared to MMA and others?
6) How can you improve fit of a temp?
7) Can you use a high speed handpiece to trim a temp?

Back 26

1) Can separate your fingers without resin stringing it
2) Let it finish curing in the impression
3) Interproximally
4) Oxygenated layer - uncured layer
5) Nicer and easier
6) Place is on and off as it cures without distorting it
7) NO

Front 27

1) You're trying to seat a crown. It won't go down. What area do you relieve first?
2) What do you do if it still won't go down?

Back 27

1) Interproximal contact points
2) Relieve the interior

Front 28

How do you fix margins and contacts of a temp?

Back 28

Repair with flowable (when biascaryl), or methacrylate for methacrylate provisionals.

Contacts - place flowable on crown, place on tooth, cure

Margins - place on tooth, add temp, cure. Or do it with temp on. Always add excess material + flow well beyond margins of fix

Front 29

1) What is required of a tooth to repair a margin or a contact?
2) When repairing with a curing light, how long do you cure for?
3) How do you smooth the surface of a temp
4) What direction do you go in to see if the temp fits well?

Back 29

1) Must be clean, not contaminated with saliva, blood, water.
2) Cure 5-10 sec, remove, cure additional 20 sec
3) With burs, polishing points, wheels
4) Gingival -> incisal

Front 30

Occlusion:

1) Where should occlusion be?
2) Where should occlusion NOT be?
3) Where can you do occlusal adjustment?
4) What bur do you use?
5) When adjusting occlusion, what do you adjust first? What should you not attempt?

Back 30

1) Functional cusps, central grooves, marginal ridges very light
2) Inclined planes in centric, working, balancing, protrusive
3) Inside OR outside of mouth
4) 12 fluted carbide football polishing bur.
5) Only marks that need adjustment - don't correct anatomy w/ every adjustment. Don't correct anatomical defects w/ each adjustment

Front 31

1) What do you use to polish your temp?
2) Following polishing, what do you place on your temp?

Back 31

1) Polishing wheels, discs, points - prophy cups and pumice, or rag wheel w/ pumice and polishing compound
2) Light cured resin sealer

Front 32

Cementation:

1) How does the tooth need to be?
2) How does the temp need to be?
3) How do you put the cement into the temp?
4) How do you actually put it on the tooth? What do you do if there's no opposing occlusion?
5) How do you remove cement and when? No cement should be left where? What should you also take out?
6) What should you do after you remove excess cement? What speed should you use?

Back 32

1) Cleaned and isolated
2) Cleaned and dry
3) Line the walls - do not fill the temporary completely full
4) Wiggle on, place on, bite down - small bead of cement should come out. If no opposing occlusion, have assistant hold it down until set
5) Only remove cement WHEN FULLY SET. No cement shoudl be left interproximally, subgingivally. Remove retraction cord.
6) Check occlusion again - use 12 fluted carbide football to adjus. High speed, light touch

Front 33

1) What is a splinted provisional?
2) How are the provisionals made? What is a requirement? What happens if you DON'T put this requirement in?
3) How are the tooth preps supposed to be relative to each other?
4) What is a problem with putting a temp on red, inflamed and bulky papilla?

Back 33

1) Two crowns adjacent to each other, connected (splinted)
2) Same, except they need embrasure for good perio health. Marginal inflammation
4) Will recede and show the margin
3) Need to draw together, like a bridge

Front 34

Criteria for triple tray over impression:

1) Tray doesn't touch
2) Where is impression material loaded
3) Also indented in PVS material?
4) Trimming

Back 34

1) Tray doesn't touch hard tissues
2) Impression material on prep side
3) Opposing teeth
4) Proper trimming to seat impression, allow marginal bulk of provisional material

Front 35

Requirements of PVS putty without tray?

Back 35

1) 1 tooth mesial and distal
2) Adequate buccal and lingual thickness
3) Proper trimming to seat impression, allow marginal bulk of provisional material

Front 36

Requirements of alginate?

Back 36

1) 1 tooth mesial, 1 tooth distal
2) Adequate trimming
3) Must wrap in damp paper towel

Front 37

What kind of bur do you use to trim temps?

Back 37

UC079EF 040 acrylic

Front 38

What are most provisional cements used? Alternatives?

Back 38

ZOE. Resin based provisional cements (conveniently dispensed, easy to clean up)

Front 39

Why shouldn't you fill up a provisional with cement?

Back 39

Hydraulic forces can prevent complete seating