6. Posterior Composite Restoration Flashcards Preview

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Flashcards in 6. Posterior Composite Restoration Deck (25)
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1
Q

Posterior Composite Restoration

REMEMBER:
• Composite resin materials have a ____ depth of cure
– they must be placed in increments, usually not exceeding ____ mm; preferably 1mm

• \_\_\_\_ has a limited curing range
A

limited
2
light

2
Q

REMEMBER:
• Composite resin materials experience polymerization shrinkage upon curing
– they must be placed in increments, to reduce the amount of ____
– Reduction in polymerization shrinkage reduces microscopic gap formation, and possibly reduce ____

• Cusp deflection - polymerization shrinkage pulling on the \_\_\_\_ creating discomfort
	○ Reason why you don't bulk fill
A

polymerization shrinkage
cusp deflection
cusps

3
Q

REMEMBER:
• Since recurrent caries is one of the main reasons for failure:
– it is important to make every effort to minimize ____ at the tooth- resin interface by implementing the incremental placement technique

A

gap formation

4
Q

Bonding System Choice Is Critical
Want:
• Strong ____
• Good ____

A

enamel bond

dentinal seal

5
Q

Bonding System Choice

  • Total etch
  • Self etch
  • Selective self etch
A

YAY

6
Q

Bonding System Choice

Bonding System Decision Making:

-Class III, IV, V
____ dentin involved > ____ etch

-Diastema
____ dentin involved > ____ etch

-Larger/Deeper Class III, IV and V
____ dentin involved > ____ etch or *____ etch

  • Research supports this method provides the best marginal seal. Use ____ etch on external cavosurface enamel for best bond strength there.• A little bit of dentin and a lot of enamel
A
little
total
no
total
more
self
selective self
phosphoric acid
7
Q

Bonding System Choice

Bonding System Decision Making:

-Class I and II
____ dentin involved > Small box > ____ etch

____ dentin involved > Large box or deep preparation > *____ etch

  • Research supports this method provides the best marginal seal. Use Phosphoric acid etch on external cavosurface enamel for best bond strength there.
A

little
total
more
selective self

8
Q

Bonding System Choice

• Studies show for Posterior teeth:
-____ box preparations (little dentin) show less enamel marginal microleakage with ____ etch bonding systems vs plain self etch bonding systems

-Example: ____ slot; small pit, etc

A

smaller
total
premolar

9
Q

Bonding System Choice

• Studies show for Posterior teeth:
-More predicatable dentin bond strength is found with the ____ etch bonding system when the preparation is larger and deeper (more dentin exposed).

-Example: Conservative Class I and Class II

A

self

10
Q

Bonding System Choice

• Studies show for Posterior teeth:
-The ____ etch bonding system shows a better enamel marginal seal than the conventional Self etch bonding systems

A

selective self

11
Q

Posterior Composite Resin Placement Technique

Palodent Plus Sectional Matrix System

* Not \_\_\_\_
* Convex
* No \_\_\_\_
* Separate teeth > compensate for the \_\_\_\_ of the band > for when you take matrix out so there isn't an open contact beccause you didn't use a wedge
* Ring doesn't obstruct view of occlusal
* Little band rests along adjacent \_\_\_\_
* Should have \_\_\_\_ on the palodent
A

circumferential
thickness
marginal ridge
floss

12
Q

Posterior Composite Resin Placement Technique

Polymerization Shrinkage:
• Curing contraction in a bonded restoration generate stress on the walls of the tooth
• “____” is a term that relates the ratio of ____ walls of the tooth to ____ walls

• Bulk fill indications - recovering after endodontics - using a \_\_\_\_ composite during a build up (internal structure of the tooth)
A

configuration factor/c-factor
bonded
unbonded
dual cure

13
Q

Posterior Composite Resin Placement Technique

Polymerization Shrinkage:
“C” Factor:
-The Ratio of Bonded/Restored walls/surfaces to Non Restored walls/surfaces
-Every restoration is like a cube, with ____ sides
-The higher “C” factor, the ____ stress the cavity will be under when restored unless special accommadations
are met during restoration placement phase

A

6

more

14
Q

Posterior Composite Resin Placement Technique
“C” Factor:

• Presence of ____ and fracture lines beyond the restoration - resulting from the shrinkage of the material (____)

A

craze

instantaneous

15
Q

Posterior Composite Resin Placement Technique

“C” Factor Examples:
• Class I: ____ walls bonded (M,D,B,L,P) /1 surface not (O) = ratio of 5/1
-“C” Factor of ____

• Class II (1 proximal surface): ____ surfaces bonded (M or D, P, B,L)/ 2 not (M or D,O)
- “C” Factor of ____

• C Factor of 5 - high polymerization shrinkage
A

5
5
4
2

16
Q

Posterior Composite Resin Placement Technique

“C” Factor (continued)
• What about the Class V?
____ walls bonded (M,D,O,G,A) /1 surface not (O) = ratio of 5/1
-“C” Factor of ____

• What about the Class III?
____ walls restored (F,A,I,G)/ 2 non restored
(M or D,L)
-“C” Factor of ____

• Surface that's not is the B and L for CV
A

5
5
4
2

17
Q

Posterior Composite Resin Placement Technique

Lower the “C” Factor - Lower the Polymerization Shrinkage….

• Do this by:
____ Placement of Composite
– Minimizes the amount of light cured composite in contact with the tooth surface at any one given time
– Rule of thumb: try to limit material to ____ walls at a time

A

incremental

2

18
Q

Posterior Composite Resin Placement Technique

Class I
*with ____ Etch Bonding System

A

selective self

19
Q

Class I Order

\_\_\_\_ Control 
Refine Preparation
\_\_\_\_ Cavosurface
Apply Self Etch Bonding System
\_\_\_\_ Placement 
Contour
Finish/Polish 
Restoration
A

caries
acid etch
incremental

20
Q

Posterior Composite Resin Placement Technique

Class II
*with ____ Etch
Bonding System

A

selective self

21
Q

Class II Order

____ Control/Refine Preparation
____ Placement/Re-wedge
____ Cavosurface
Apply Self Etch Bonding System
Place ____ on the Gingival floor
Incrementally Place Composite (Box first, then occlusal portion)
Finish/Polish Restoration Completed Restoration

A

caries
matrix
etch
flowable composite

22
Q

Laboratory Procedure
1. Place the ____

  1. Condition tooth: Phosphoric Acid Etch Cavosurface for ____ seconds - Rinse thoroughly
  2. Application of Self Etch Prime and Bond Elect® Bonding Agent Same steps as with Class III and IV restorations
  3. Application of Shurfil SDR Flowable ® in Box (layer #1 above) New “Low stress bulk fill” Flowable composite
    Only use for first increment in the ____ area first
    ____ Floor only – 1mm
    Light cure for ____ seconds
  4. Application of TPH Spectra HV® in Box (layers #2, #3, and #4 above)
    Place incrementally to build up the remaining ____ area first
    Try to keep material on only ____ walls at each time
    Light cure each increment for ____ seconds
    This will create a ____
A

matrix/wedge
15

box
gingival
30

nox
2
30
marginal ridge

23
Q

Laboratory Procedure

  1. Application of TPH Spectra HV® in the Occlusal portion Place incrementally along entire ____ wall
    Light cure for 30 seconds
    Place incrementally along entire ____ wall
    Light cure for 30 seconds
    Sculpt final ____ increment, leaving the preparation slightly overfilled
    Light cure for 30 seconds
  2. Polish and contour with Composite Finishing Burs
    -or Green and White stones (if much excess), then Finishing Carbides and Diamonds
    ____ Discs can be used in the embrasure areas – carefully
    Enhance points, cups, and discs can be used as well
  3. Polish with Prisma Gloss Polishing Paste in a prophy cup
    Verify contact
    -____
    -With ____
  4. Remove Rubber Dam
A

lingual
buccal
occlusal

soflex

visually
floss

24
Q

Posterior Composite Clinical Failures
Early Failures

  • ____ formation
  • Contamination/Voids
  • Post operative ____
  • Poor adhesion
  • ____ halo
  • Missing contact

DUE TO:
Poor ____/placement of materials
Poor ____
Poor ____ selection

A

gap
sensitivity
white

handling
isolation
case

25
Q

Posterior Composite Clinical Failures
Late Failures

  • ____
  • Wear
  • ____ caries

DUE TO:
Poor ____/placement of materials
Poor ____
Poor ____ selection

A

fracture
microleakage/recurrent

handling
isolation
case