Class II Composite Restoration Flashcards
large filler particles, no longer used much
macrofill
use in anterior areas on the facial, gives superior polish but is not as strong as hybrids
microfill
filled with nanoparticles (Filtek Supreme –use in the clinic)
nano fill
midi and microfillers
Hybrid
______ has more shrinkage (is lower filled) and less stress (has more resin to relieve the stress as it cures)
Flowable
_____ has less shrinkage (is higher filled) but has more stress
Hybrid
◦ Place etch on enamel first, followed by dentin
◦ ETCH ENAMEL 20-30 SECONDS
◦ ETCH DENTIN 15-20 SECONDS
◦ Rinse and gently air dry
Complete Etch
◦ Etch enamel only
◦ 20-30 seconds
◦ Rinse and air dry
Selective etch
_______ the dentin results in in collapse of collagen layer (more on that later)and reduced bond strengths
Desiccating
The sticky uncured layer left on the surface
Oxygen Inhibited Layer
______ in air interferes with polymerization on surface of composite
Oxygen
Finishing can remove the ___ ___ ____.
Oxygen Inhibited Layer
Place the first layer of composite resin in the proximal box to a depth of about _ mm.
1mm
_____ adding composite to the prep minimizes stresses placed on the material and on the tooth due to polymerization postoperative sensitivity. Build up in increments do not place the shrinkage. This may be a factor in postoperative sensitivity.
Incremental
For the final cure,
Cure the restoration from the buccal __ sec Cure the restoration from the lingual __ sec
20 seconds both sides
Ratio of bonded to unbonded surface
C Factor
Is a low or high C Factor preferred?
low
stress can be relieved in the flow of the resin during the pre-gel state
Class I the______ (highest C Factor- 5:1)), Veneers the_____ (Lowest C Factor- 1:1)
worst
best
t/f: if adhesive bond strength < polymerization stress =debond may occur
true
t/f: If adhesive bond strength > polymerization stress = cusp
deformation may occur, depending on flexibility of remaining
tooth structure. Related to post-op sensitivity.
true
Remove caries
◦ DO NOT do complete prep
◦ Seal remaining fissures
◦ Appropriate for small carious lesions
more than sealant less than restoration
Preventative Resin Restoration
t/f: In order to reduce post operative sensitivity.
Cover very deep dentin with liner
◦ CaOH or Glass Ionomer
true
Are highly filled
◦ more translucent fillers (do not shrink)
◦ less resin matrix (shrinks) Higher filled= more stress because
◦ less resin to relieve the stress when it cures Flowable bulk fill may be indicated as first increment in proximal box
bulk fill composites
_____ is a large monomer that limits the number of shrinkage zones, reducing the amount of shrinkage that occurs during polymerization.
AUDMA
aromatic urethane dimethacrylate
What two monomers together allows a one-step placement of bulk fill up to 3-4 millimeters.
Addition fragmentation monomer (AFM) and aromatic urethane dimethacrylate (AUDMA)
