ch 6 dental materials

what are the most common filler ("feel her") particles in composite? (3)

what is added to composite for radiopacity to show up on an x-ray?

10-100 um (marshmellows) represent:

1-10 um (jelly beans) represents _______ composite

.1-1 um (red hots) represents _______ composite

.01-.1 um (nerds) represents _______ composite

.001um (sugar) represents _______ composite

composite resin,
glass ionomer cement (hybrid ionomer), and
resin-modified copomer
are _________ - ________ esthetic materials.

________ is a mixture of two or more materials with properties superior to any single component

composite resin is mainly composed of an _______ resin (polymer) matrix and ________ (silica) filler particles

what adheres the silica and polymers to the matrix?

what is the size range of hybrid composite?

nanofilled micro hybrid is a blend of _____, _____, and nanofill particles (jelly beans, nerds, and sugar)

what composite is popular due to high polishability and ease of handling, but requires tooth support?

name to reasons why hybrids are popular.

nanofills ______ polish ability but add ___ compressive strength

nanofills ____ surface area and _____ strength to resin or composite

a light cured (_______) mix of composites is _____ porus than self cured (_______)

composite contains polish with ___ ____ or diamond polishing paste, not coarse ______

what helps reduce shrinkage when the resin matrix polymerizes or sets?

how would you detect a composite overhang?

porcelain is a direct or indirect restorative material? which one?

type of material chosen depends on what four factors?

what is the most commonly used resin for the matrix of composites?

what is the most commonly used filler?

the higher the filler content, the _________ the restoration and the more _____ _______

what are two important factors for the durability of the composite resin?

composition of composite is _____ resin (polymer) matrix, inorganic ______ filler particles, ________ coupling agent

what does the silane coupling agent do?

T/F composite composition includes an initiator, accelerator, and pigment
True False

T/F filler particles help control handling characteristics
True False

filler particles make organic resin _______, more wear _______, ______ handling characteristics, and reduce polymerization _______

what three things are composite wear related to?

is it better to have smaller or larger particles of composite on the surface?

higher filler content = ____ and _____ wear resistant

does smaller or larger particles of filler have more surface area?

what does a coupling agent do?

what allows organic matrix and inorganic filler to adhere?

good adhesion of both organic matrix and inorganic filler is necessary and it minimizes the loss of _______ ________, as well as reducing _____

are pigments organic or inorganic?

what approximate basic colors of teeth?

________ join together to create ________, usually hydrogen for composite polymerization

chemical reaction ( ____ + ____)

which filler particles are more easily plucked (get pulled) large or small?

which size of particles are not as easily plucked and cause fewer voids that contribute to wear?

T/F the smaller the particles, the smoother the surface of the composite after finishing and polishing
True False

BASE = ______ + composite

catalyst = ______ + composite

composite resins can be cured by _____ or _____ activation or a combination of the two (___)

during polymerization for both chemical or light, an _____ molecule forms _____ _____

what are free radicals?

what is the activator for polymerization? (2)

the monomers ( _________; e.g. bis GMA) have carbon to carbon double bond functional groups

what do free radicals do to carbon to carbon bonds?

free radicals during polymerization can cause the same reaction (break C=C bond) with another monomer to add to the _____ chain (called addition polymerization)

when monomers link together into chains, the volume of the resin ________, so the net result is ________

polymer to polymer is a " cross-link " to form _______ bonds

what is stronger and stiffer material? (what to what)

benzoyl peroxide is an ________ base

tertiary amine is an ________

what is the most common type of polymerization of composite?

what is diketone?

if composite is too thick will the bottom cure all the way?

what mm of increments should composite be placed in?

with a chemical cure (self-cure) how long does the operator have to place the restoration before it becomes too stiff?

what will happen if the self-cure material initial set occurs and the material is manipulated?

t/f two pastes must be manually mixed, air can be incorporated into the material causing voids or porosity in the restoration
True False