Class 2 composite preparation and restoration

Question 1

why is this the class 2 composite the most important?

Answer 1

its the most common and most challenging restoration well have.

Question 2

Rubber dam is pretty important in this for what reason?

Answer 2

helps keep the area dry, and helps improve vision.

Question 3

internal line angles of posterior composite restorations should be square or rounded?

Answer 3

rounded, this reduces polymerization shrinkage and decreases post-operative sensitivity

Question 4

are undercuts necessary for composite retention?

Answer 4

no but they dont hurt

Question 5

When is the axial box preparatio acceptable?

Answer 5

when theres no decay patterns under the occlusal groove

Question 6

Name some ideal class 2 composite prep criteria

Answer 6

1. rounded internal line angles
2. divergent walls
3. slightly greater than 90 deg cavosurface
4. proxibal floor should not be beveled.
5. smooth pulpal floor
6. 2mm deep pulpal floor
7. external outline is dictated by caries
8. for convenience form, the explorer tip should slide freely through cervical box and proximal wall areas.

Question 7

for composite class 2, do you need a S shape curve ? and where the proximal box start to flare?

Answer 7

it is not needed, the flare starts at the axial wall.

Question 8

what interproximal tool do we use for composite?

Answer 8

palodents

Question 9

do you use a wedge for the palodent system?

Answer 9

yes

Question 10

Whats the simplified process of adding composite?

Answer 10

etch 30 seconds, dry ( dont desicate), apply dentin/enamel bonding agent and light cure

Question 11

Placing the composite for a class 2

Answer 11

fill proximal bod 1/2 to occlusal, with round instrument move composite to buccal and lingual walls then cure

Question 12

do you condense composite?

Answer 12

no it makes holes

Question 13

what if the carie is so deep the floor is cementum and not enamel?

Answer 13

we do not etch cementum! we place SDI glass ionemer at the cervical margin and then composite on top of that. ( this is the open sandwich technique)

Question 14

whats the closed sandwich technique?

Answer 14

it maintains the bond between the composite and the enamel.The glass ionomer is between

Question 15

applying composite to occlusal portion.

Answer 15

drag composite toward the margins with a wide flat blade ( dont use ball burnisher for this part). Add some anatomical grooves and ridges. light cure

Question 16

When adjusting the occlusion what burs must be used?

Answer 16

fluted or round composite finishing burs

Question 17

after adjustments have been made what do you do?

Answer 17

polish with polishing burs and then you can use the polishing paste

Question 18

when can you use the Tunnel prep?

Answer 18

when theres no proximal tooth and the careis are only below the marginal ridge and there are no occlusal caries. ( its pretty much a window in the side of the tooth)