Basic Knowledge
A specific amount of composite (thickness) that is cured by
a light source is termed
Depth of cure
The_____composite restorative materials are those with a
lower viscosity (decreased filler) to aid in placement
Flowable
Thermal expansion for microfill composite restorative
material is considered to be
Poor
A combination of a pit and fissure sealant and a composite
restoration is termed
Preventive resin restoration
True/False
You can and should look at the light omitted from curing lights to make sure you are shining light in correct area.
False
The size of the filler particles in a dental composite
determines the
Surface smoothness of the resulting restoration
Hybrid composites are recommended for
Areas needing strength
Abrasion resistance for hybrid composite restorative
material is said to be
Very good
Why in incremental addition important?
to allow the first layer to set and shrink before adding more resin
Light with a wavelength of 470 nm is ________ light that is
visible to the human eye
Blue
The first acrylic resins used in dentistry were used for ________?
denture bases
What advantage do microfilled composites have compared
to macrofilled composites?
Smooth and lustrous polished surface
Composite materials that polymerize using light
activation are
Supplied as a single paste
One problem with polymers is their high coefficients of
thermal expansion. These coefficients can be_____to_____times greater
than that of tooth structure.
2-10
Which of the following best describes microfill composite
materials?
Polishability is very good; strength is low
What kind of composites are supplied in a jar or tub, syringe or capsule?
Light-cure composite
Which of the following characteristics best describes
chemical-cure composite restorative materials?
May incorporate air bubbles during mixing
Which composite material has the largest percentage of
filler by weight?
Hybrid
Light-activated glass ionomers are also called ________ glass
ionomers.
resin-modified
_________ composite materials are used for class III and IV restorations?
hybrid composite
What are the 3 dental composite categories?
macrofilled, microfilled,
and hybrid
Which of the following components of restorative resins
acts as a “coating” and serves to transfer stress from a weak
component to a stronger one?
Silane coupling agent
A restorative material that initially releases some fluoride
(like glass ionomers) but bonds and sets like composites is called
Compomer
_____ label is used
to describe materials that bond and set like dentinal bonding/composite
systems but that initially release some fluoride-like glass ionomers
Compomer
Glass ionomers have been improved by resin
reinforcement and can be activated how?
chemically or by light