Midterm Flashcards
T/f: Epinephrine makes LA last longer
true
t/f: When using amalgam make sure to fill 1 mm above the margins and fill box FIRST
true
Need to have slanted prep for_______ ____ _____ or else will hit the pulp if it’s perpendicular
mandibular first premolar
Root surface caries are more commonly found
Gingival to the contact
All of the following are reasons we have failure at the gingival portion of the box except:
Incremental fills instead of bulk
Get more post-op sensitivity with
Bulk fill
T/F: it is okay to leave loose enamel rods n a class III
False???
I thought you could have undermined enamel on the facial wall
All of the following are indications for composite except:
Heavy occlusion on the contact
t/f: Adhesive separates in the presence in presence of water (water in tubules or ANYWHERE)
true
t/f: Check shade before putting on a rubber dam
true
t/f: When in dentin DO NOT BEVEL
true Keep at 90 degree butt margin
Key difference composite and amalgam
Bevel gingival floor
Why do we not use eugonal
Inhibits polymerization
causes termination
t/f: Self-etching primer is not strong enough to etch enamel and only partially removes smear layer
true
t/f: Cure-through gives better contour for class V restorations
true
t/f: Palodent is placed 1 mm above margin
true
t/f: Self-etch systems have acid in the primer
true
Light Initiator is ______
camforquinone
if prep is deeper/closer to the pulp you place retention grooves 1 mm farther axillay.
false
never put them deeper or else could have pulp exposure
What is the sensitizing element of toothpaste?
Sensitivity toothpaste contains KNO3
Micromechanical to enamel rods and micromechanical to dentin collagen
Etching?
t/f: Hybrid layer is zone resin and intertubular dentin
true
Strength for bonding comes from the_____ in intertubular dentin
collagen
T/F: you must put down bonding in between every increment of composite
false, only when the prep has been exposed to saliva
the dentin tubules are ______ near the dentin
wider
More filler=______ strength
increases
What is the order of the restoring a carious lesion?
Order: etch bond fill finish polish
______ is caused by flexture/fatigue
Abfraction
_______ is from lemon drops
Erosion
t/f: Best thing to remove flash is gold knife
true
When to re-etch?
Contaminated
Doesn’t look etched
How thick is the bond applied?
thinly
Which class has the highest C factor:
Class 1
The hydrophobic portion of the bonding agent is what:
bonding resin
When doing a class III make sure to preserve the______ contact
incisal
Etching does all of the following:
does increase wettability, SA, surface free energy
The old test was a bit confusing, so make sure to 2x check this
______ happen from tugback
Voids
best bond happens when bound to ______ (ends) portions of enamel rods
perpendicular
When placing composite in bulk vs incremental is false?
Will have decreased incremental stress
Heavy occlusion on L Ant teeth what is the prep type?
conventional
Best description of collagen in a hybrid?
Zone collagen surrounded by resin in intertubular dentin
Most probably explanation for a grainy finish of a composite after completion?
Premature curing by operatory light
Which part of prep of class 2 and 3 have similar requirements?
Class 2 don’t break B contact Class 3 don’t break Incisal contact
Which type of solvent in dental adhesion will undergo phase separation?
water
What material in placement of resin composite improves surface wetting, increase surface area available for bonding, and increases surface energy?
Phosphoric acid
Rank following composites in order of filler?
nanofiller, macrofiller, midifiller, microfiller
Macro, midi, micro, nano
Which test is the best predictor for composite longevity
Fracture toughness
Retention in a class 5 prep is placed at the ?
Occlusion axial line angle
In regard to in euginol resin composites?
Inhibit polymerization in composite
Which part of the tooth can you desiccate dry with the air syringe?
dentin
Abfraction filled with what kind of composite?
microfill
Retention groove in a class 3 is placed in?
gingival
