Quiz 2 stuff - composite Technique

Question 1

Retention with composite:

Answer 1

Proximal box enamel margins are beveled to expose ends of rods, greater bond strengths. 45 degree, .5 mm bevel.

Question 2

Gingival Cavo margin: Bevel vs non-bevel:

Answer 2

Bevel : > 1 mm from CEJ
don’t bevel: < 1 mm from CEJ to below CEJ.

Question 3

Causes for post-op sensitivity:

Answer 3

improper placement / curing
polymerization shrinkage/microleakage
higher C-factor (% of bonded surface to unbonded surfaces)
Enamel cracks

incremental placement helps prevent sensitivity. Its good

Question 4

C - factor:

Answer 4

ratio of bonded surfaces to unbonded surfaces.

Question 5

SNOWPLOW technique:

indication:
objective:

Answer 5

Indication: dentin-composite restoration
objective: better adaptation of composite to dentin.

Question 6

SNOWPLOW technique:

steps:

Answer 6

1.) bonding
2.) flowable (.5 depth). DO NOT CURE
3.) Apply packable composite (1 mm depth) evenly and cure
4.) Finish composite restoration.

Question 7

Triodent-V3 matrix system:

Answer 7

V-Ring: compensates for thickness of matrix by separating teeth.
Wave wedge: seal gingival area
Sectional Matrix: Creates temporary wall.

Question 8

All are finishing burs for composite except:

7901
7404
H274
245

Answer 8

245

Question 9

Chlorhexidine for how long:

Answer 9

60 seconds.

Question 10

Composite protocol: Steps:

Answer 10

1.) rubber dam, prep, B-L extension bevels, Use V-ring system
2.) Acid etch enamel 20 sec. rinse with water
3.) apply chlorhexidine 2% for 60 sec. Dry with air
4.) Apply Scotchbond universal (2 layers) in 20 sec, thinned with microbrush before curing, air dry 5 sec
5.) light cure 10 sec
6.) Use permaflo with snowplow technique.
7.) Use layered fill technique, filtek supreme, 2 mm in depth each
8.) light cure 20 sec each layer.
9.) finish / polish