Posterior Composites
Presented by Dr. Robert Margeas, DDS
Quiz Results and Correct Answers
1) When replacing the dentin with a self cure composite:
the material is incrementally placed
the self-cure composite can replace all of the missing tooth structure
the material can be condensed as it is setting
the self-cure material places the same stress on the bond as a light cured material
must be used with a flowable liner
2) When restoring posterior teeth with light-cured composites:
self-etching adhesives are the adhesives of choice
filled adhesives make no clinical difference
a radiolucent liner should be used
an air-only dedicated line should be used for the bonding procedure
a liner of 1-1.5 mm should be placed
3) Flowable composites as liners:
do not affect the adaptation of composites to cavity walls
reduce marginal leakage
should be cured simultaneously with the adhesive
have no effect on the flexural strength of composite resin restorations
do not affect post-operative sensitivity
4) The shear bond strengths of self-etching adhesives to enamel:
create a reliably strong bond
have less microleakage than total-etch systems
result in staining at the enamel-composite interface
are not affected by the pH of the adhesive
are all the same
5) When placing a packable, light cured posterior composite:
the material should be placed in 2 mm increments
the composite should be placed to below the contact area
the top layer should be straight across bucco-lingually
one can bulk fill the preparation
a flowable liner has no effect
6) The self-etch adhesives have increased in popularity because:
they have higher denting bonding strengths than the 4th generation adhesives
they are universal with all composites
the provide a hermetic seal for vital dentin
the have lower incidence of post-operative sensitivity
all have fewer steps than the fourth generation adhesives
7) Current composite resins:
are all the same when it comes to polymerization contraction
contract volumetrically 2% to 5%
are all light cured
react equally at the bonding interface with all adhesives
have a system that shows the lowest polymerization contraction
8) C-factor of the cavity design:
is the number of unbonded surfaces in the cavity design
greatly affects the polymerization stress of the composite
is highest in a class V cavity preparation
is the lowest in an occlusal preparation
has no effect on polymerization contraction stress