Lecture 2

Question 1

What chance will caries develop under composite?

Answer 1

40% (higher than amalgam)

Question 2

Advantages of posterior composites

Answer 2

• Conservative prep
• Volume small (less shrinkage)
• Contact area small (less wear)
• Good longevity

Question 3

Why do you use a base?

Answer 3

control reaction of the pulp

Question 4

Why do you use adhesive?

Answer 4

to minimize sensitivity

Question 5

biting pressure sensitivity with total etch

Answer 5

0-30%

Question 6

thermal sensitivity with total etch

Answer 6

8-12%, due to microgaps

Question 7

smear layer

Answer 7

ground bits of HA, collagen, bacteria, salivary proteins. Inhibits resin penetration into dentin.

Question 8

primer

Answer 8

hydrophilic

Question 9

adhesive

Answer 9

hydrophobic and hydrophilic

Question 10

biting pressure with total etch

Answer 10

central location, 0-30%

Question 11

light cure

Answer 11

468 nm

Question 12

What type of curing light do we use?

Answer 12

LED

Question 13

O2 inhibition layer

Answer 13

top part of composite that does not harden, unreacted double bonds available for next layer

Question 14

Degree of conversion

Answer 14

% of polymerization, 100% ideal, 65% is maximum for composites.

Question 15

Light intensity is proportional to

Answer 15

distance

Question 16

finishing wheels (yellow and purple)

Answer 16

sof-flex