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24 Fixed/Occlusion > Resin-Bonded FDP, Manifold Spruing, Coping Fit/Finish > Flashcards

Resin-Bonded FDP, Manifold Spruing, Coping Fit/Finish Flashcards

1
Q

what is Rochette bonding technique

A
  • perforated framework
  • Type IV gold
  • perio splinting
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2
Q

what is Howe and Denehy bonding technique

A
  • perforated framework
  • non-precious alloy
  • pontic
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3
Q

what is McLaughlin and Livaditis and Thompson bonding technique

A
  • electrolytic etch of non-precious alloys
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4
Q

does acid gel chemical treatment require special equipment? what type of results are given

A
  • does not require special equipment
  • can give unpredictable results
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5
Q

we can get increased bonding thru metal surface due to what design variations? (4)

A
  1. acrylic resin beads
  2. mesh
  3. salt crystals
  4. silica
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6
Q

how can we get increased bonding thru chemical methods?

A
  1. silicoating
  2. tin electroplating
  3. adhesive resin cements and aluminum oxide
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7
Q

advantages of RBFDP

A

Minimal tooth preparation
Supragingival margins
Reduced cost
No anesthetic needed?
Rebonding possible
Reversible

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8
Q

disadvantages of RBFDP

A

Overcountoured metal wings
Allergic potential of non-precious alloys
Limited longevity, debonding, aspiration
Limited alignment correction
Limited space correction
Esthetics - graying of incisal edge
Provisionalization difficult

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9
Q

Indications for RBFDP

A

Desire for conservative treatment
Caries-free abutment teeth
Large pulps (young patients)
Provisional treatment
Mandibular anterior replacements
Periodontal splinting
Economics/cost

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10
Q

Contraindications for RBFDP

A

Short clinical crown abutments
Spacing problems
Unsound enamel/caries
Poor tooth orientation
Nickel sensitivity
Deep vertical overbite
Bruxism

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11
Q

what does basic work-up for RBFDP include

A

Diagnostic Casts
Survey and Design
Diagnostic Wax-up
Patient Discussion

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12
Q

what are the design priorities for RBFDP

A
  1. distinct path of insertion
  2. max bond surface area
  3. 0.5 mm thickness in critical areas
  4. supragingival margins
  5. 180 degree wrap around
  6. vertical stop
  7. occlusion
  8. grooves
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13
Q

what thickness is necessary at critical areas of RBFDP? what about the wing areas?

A

0.5 mm thickness
wing areas = 0.3-0.5 mm

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14
Q

what are the different ways to create RBFDP

A
  1. direct wax technique
  2. refractory cast technique (cast directly on cast)
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15
Q

what is a Hugger Bridge

A

Nanohybrid composite
Heat treated
Suitable for stress-bearing areas
Radiopaque
Quick and painless

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16
Q

what are insertion procedures for RBFDP

A
  1. Try-in and adjustment
  2. Glaze and polish
  3. Prime metal for bonding
  4. Clean
  5. Rubber Dam
  6. Bonding protocol
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17
Q

what is used to bond RBFDP

A

Panavia 21

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18
Q

bonding protocol for RBFDP

A

Pumice
Rinse
Etch tooth
Rinse
Primer
Mix cement
Insertion
Clean excess cement
Oxy-Guard
Rinse
Clean cement
Recheck occlusion
Hygiene instruction

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19
Q

what is used to block margins of RBFDP

A

Oxy-guard

20
Q

should RBFDP have parallel walls?

A

nearly parallel walls w/ 6 degree taper

21
Q

are RBFDP supra or subgingival margins

A

supragingival

22
Q

do RBFDP have maximum or minimum coverage of enamel

A

max

23
Q

are vertical stops present on RBFDP

A

yes

24
Q

what determines long term success for RBFDP

A

Periodontal stability of abutments
Proper etching
Proper bonding protocol
Control of occlusion
Preparation design

25
Q

all ceramic RBFDP:

___ mm connector thickness in labiolingual
direction
___ mm in cervicoincisal direction
Wings ___ mm thickness
No occlusal contact where?
Are cantilevers allowed?

A

2mm; 3 mm; 0.5-0.7 mm thickness
no occlusal contact on pontic
yes, cantilevers allowed

26
Q

insertion procedures for zirconia RBFDP

A

For Zirconia, same as metal except use tooth
colored cement instead of opaque (Panavia
TC versus Panavia OP)

27
Q

insertion procedures for other ceramic materials

A

extra bonding and silane needed (Currently creighton is not set up to do this alternative)

28
Q

what are the 3 small wax sprues on Manifold spruing? where are they placed

A

10 gauge on incisal edge

29
Q

what runs alongside the 10 gauge wax sprues? is this thicker or thinner than the 3 rods?

A

Runnerbar (8 gauage) so thicker

30
Q

what attaches to the runnerbar (not the 10 gauge side)

A

sprue base former

31
Q

why do we touch up sharp angles on manifold spruing

A

want to decreased and possible turbulence in molten metal

32
Q

what temp for manifold spruing

A

1400 F

33
Q

how many times to wind casting machine

A

3 times

34
Q

what types of torch in manifold spruing

A

gas/oxygen

35
Q

you should heat the metal until it looks like what

A

molten and slumps into place

36
Q

what causes a LARGE NODULE

A

air trapped during investing

37
Q

what causes MULTIPLE RANDOM NODULES

A

inadequate vacuum during mixing

38
Q

what causes NODULES ON UNDERSIDE ONLY

A

prolonged vibration after pouring

39
Q

what causes SHRINK-SPOT POROSITY

A

sprue attachment too bulky. sprue too long or thin. button too small

40
Q

what causes RANDOM POROSITY

A

dirt in wax pattern, loose particles of investment from sharp edges

41
Q

what causes FINS

A

dropped ring, rapid heating of wet or unhardened mold, liner flush with end of ring. excessive casting force

42
Q

what causes SHORT, ROUNDED MARGINS WITH ROUNDED OR LUMPY BUTTON

A

alloy not hot enough or insufficient casting force

43
Q

what causes SHORT, ROUNDED MARGINS WITH SHARP BUTTON

A

pattern too far from end of ring OR if casing is shiny, incomplete burnout of wax

44
Q

what causes BLACK, ROUGH CASTING

A

breakdown of investment from excessive heat

45
Q

what bur does Graddy use to separate FDP from sprue

A

Great White (looks like a oval with black line)

46
Q

what thickness of metal for FDP

A

0.5 mm (on PP but video he says 0.3-0.5)

47
Q

use ___ where you need a lot of reduction
use ___ in ___fashion where you need very little reduction

A

Great White
Green stone; horizontal fashion

24 Fixed/Occlusion (2 decks)

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