Quiz 4-Class II composites, Class III (composites) Flashcards
Which component of the composite has the high polymerization shrinkage??
the RESIN (not the filler)—aka Bis GMA
Which component of the composite is easiest to wear? (aka-lowest wear resistance)
the RESIN (not the filler)—aka Bis GMA
Which component of the composite soaks in water?
the RESIN (not the filler)—aka Bis GMA
The filler in composite has a Mohs (haha Moh’s) hardness factor of ___ which is comparable to steel, but that makes it relatively _______. But the properties of the composite all depends on ______ of the filler.
7….BRITTLE…size
Understanding composite: it bonds best to ____ & _____ enamel.
cut & etched
Understanding composite: it has high _________ SHRINKAGE
polymerization
Understanding composite: has limited occlusial ________
wear resistance
Understanding composite: requires a relatively _____ field for predicable adhesions.
dry
We don’t recommend placing composite directly on _____ in a deep class II, instead we would use a ________ technique with _______.
dentin…sandwich….glass ionomer
We always want to place composite in small, less than ____mm increments.
2mm
The outline form is ALWAYS determined by _______!
DECAY
The _______ are larger then amalgam (for aesthetics and matrix band)
proximal extensions
Avoid placing the cavo-surface in ______ areas, so you can pre-________.
contact….pre-articulate
TRY to keep the gingival floor in _______.
enamel
While there SHOULD be no undermined enamel, a ‘_______’ amount is permissible with composite.
‘minimal’
The _______ of a class II compostie does not need an additional bevel.
cavo-surface
Bevels are placed in the ______ on the cavo-surface in ENAMEL only!
box form
Bevels are ____ degrees and ____-____mm
45 degrees…. 0.5-1.0mm
Even though there is no science, we want the occlusal part of the prep to be ____mm where contacts are involved.
1.5mm
Do we put retention points in traditional class II composite preps? DO we bevel the gingival margin?
nope, only if its still in enamel (which will be rare)
If we have a deep box, what is the minimal axial depth?
1mm
DO we place retention grooves on composite slot preps? Do we bevel?
yes…yes
How much proximal separation do we have for composite preps?
0.5-1.0mm
What are the three composites we can use in the box form?
flowable (margins), glass ionomer (resin modified), and micro-hybrid composites
What are the three composites we can use in the box form?
flowable (margins), glass ionomer (resin modified), and micro-hybrid composites
What are the 3 composites we can use in the occlusal surface of our traditional class II?
microhybrid, nano-composite, highly filled composites
What are the 3 composites we can use in the occlusal surface of our traditional class II?
microhybrid, nano-composite, highly filled composites
What are the three components to our specially coated composite instruments?
Nickel, Aluminum, and Nitride
What are the three components to our specially coated composite instruments?
Nickel, Aluminum, and Nitride
What type of wedge do we use for class II composites?
plastic wedges!
Remove this thing (if you chose to use it) BEFORE placing bevels.
pre-restorative wedge
What is the order of bevel placing in the box form? The bur cuts from ______ the box form.
1.gingival 2.facial 3.lingual….inside
Which composite type has high polish ability, good transparency, but is brittle and has poor fracture strength? Where do we generally put these?
MicroFilled composite….final layer of anterior restorations
What is the most common composite used? It has good overall strength, is the most versatile, but has fair internal polish and the silica can be plucked out…
Hybrid composites
Which is the NEWEST composite (a Dr. H favorite), has high polish ability, good wear resistance, low shrinkage, but has high cost and questionable overall internal strength?
Nano-composites
Which matrix system tends go yield LIGHT contacts?
tofflemire band matrix
What type of matrix system is the GO TO for composites?
the sectional matrix yo!
What do we burnish the metal matrix band with?
double ended plastic instrument
Why do we use plastic wedges?
they “WRAP” around the matrix band!
For WIDE embrasures, place the ring on the _______ side of the wedge from the prep.
OPPOSITE
For MOD’s you can use 2 G Rings!!! Place the long ring _____ the standard ring.
OVER
Why do we keep GI away from the cave surface?
it has poor wear resistance and will cause leakage!!
We are going to etch for a total of _____ seconds, and rinse for a total of _____ seconds.
20…20
The bond we use in sim clinic is _____ generation, which is _______ + ______.
5th generation….primer + bond
IF you decide to add CHX, when do you apply it?
Post-etch and pre-bond
Which post-etch, pre-bond treatment can cause ‘water’ trees and possibly inhibit penetration of bonding resin?
cavity cleanser
What is the post etch, pre bond desensitizer we like to use? (2 names)
GLUMA or HEMA
Where does our main dentin retention come from?
INTERTUBULAR DENTIN!
When dentin is dried, the collagen fibrils ______.
collapse
The HYBRID layer is between the _______ and the ______.
BONDING resin and DENTIN
Bond- the _____ use containers are the best and scrub the applicator for ___ seconds.
single use….15 seconds
_______ blow away OR suction volatiles from a distance and then move closer.
GENTLY
Light cure your bond for ____ seconds…What do we do if it was contaminated with saliva?
20 seconds..re-etch etc…
TO SEAL the gingival margin we will use ______ composite and our ________ instrument.
flowable…explorer
The flowable layer on the gingival margin is very ______ and it is cured for ___ seconds.
thin…20 seconds
IT IS important to place composite sequentially because polymerization shrinkage can cause tension on the _____.
cusps
When placing composite in the box, Dr. H likes the ‘______’ profile design and to use the _______ instrument…Its all good to switch to this bad boy for the occlusal surface.
‘U-profie’….XTS Mini #1….XTS Mini #3
Final light cure for _____ seconds.
60
When do we check occlusion? (2 distinct times)
After pre-finishing(before polishing) then After GLAZING
DO we use water with the pre-finishing burs?
YES
How many microns for the Red-Fine pre-finishing burs? How many microns for the yellow-extra fine pre-finishing burs?
30microns for red…..15 microns for yellow
What are the three types of pre-finishing burs we use?
379, 135, and 247
What can we use for gingival margin flash?
14 de meo carver
What are the 4 polishing steps?
1.fine soft disc (wet, slow) 2.rinse and DRY 3.super-fine disc (dry, fast) 4.jiffy brush (dry, fast)
If you are going to use a rubber impregnated polisher make sure to use ______!
LUBRICANT!! (KY or H2O)
When using the ICDAS codes, what level do we do a MIR? What % has it progressed?
classes 4-6…88% of dentin
IF IN THE OUTER 1/2 of DENTIN, ____% are likely caveated!!!! If in the inner half of dentin (____%)
40.9 %….(100%)
Direct pulp caps are used for a _____ exposure of less than ___mm. A thin layer of _____ is placed over the exposure.
small…1mm…CaOH
