Restorative Resins Flashcards
attributes to resins
- easy to shape and polish
- can be made of various shades and translucencies
- generally non-soluble
- soft, non-damaging to opposing tooth
- biocompatible in cured form
- good insulators
- compatible with adhesives
- comfortble, no galvanic responses
limitations of resins
- low modulus
- low resistance to wear
- high coefficient of thermal expansion
- polymerization process causes shrinkage
- often porous and degradable
- can accumulate plaque and deposits
- may release residual monomers
reinforced acrylic aka
filled resin
T/f concrete is a composite
true - type of one
concrete characteristics
- made of sand and gravel bonded with cement and wate
- poor tensile strength
- good compressive strength
how to overcome weak tensile strenght of concrete
use reinforced concrete with the addition of steal to make tensile strength better
matrix phase description of dental resin composites
resin paste with easy handling, shaping, and fast curing at room temperature
filler phase of dental resin composites
particles to reduce shrinkage and thermal coefficient
must be optically and chemically compatible
dental resin initiators
Camphoroquinone (CQ)
Propane phenyldione (PPD)
both Blue visible light
visible light activation initiates? via?
Camphoroquinone (CQ)
- reacts with amine activator and forms free radicals to initiate the addition polymerization