Restorative Resins

Question 1

attributes to resins

Answer 1

1. easy to shape and polish
2. can be made of various shades and translucencies
3. generally non-soluble
4. soft, non-damaging to opposing tooth
5. biocompatible in cured form
6. good insulators
7. compatible with adhesives
8. comfortble, no galvanic responses

Question 2

limitations of resins

Answer 2

1. low modulus
2. low resistance to wear
3. high coefficient of thermal expansion
4. polymerization process causes shrinkage
5. often porous and degradable
6. can accumulate plaque and deposits
7. may release residual monomers

Question 3

reinforced acrylic aka

Answer 3

filled resin

Question 4

T/f concrete is a composite

Answer 4

true - type of one

Question 5

concrete characteristics

Answer 5

1. made of sand and gravel bonded with cement and wate
2. poor tensile strength
3. good compressive strength

Question 6

how to overcome weak tensile strenght of concrete

Answer 6

use reinforced concrete with the addition of steal to make tensile strength better

Question 7

matrix phase description of dental resin composites

Answer 7

resin paste with easy handling, shaping, and fast curing at room temperature

Question 8

filler phase of dental resin composites

Answer 8

particles to reduce shrinkage and thermal coefficient

must be optically and chemically compatible

Question 9

dental resin initiators

Answer 9

Camphoroquinone (CQ)

Propane phenyldione (PPD)

both Blue visible light

Question 10

visible light activation initiates? via?

Answer 10

Camphoroquinone (CQ)

- reacts with amine activator and forms free radicals to initiate the addition polymerization