Exam 3: Intro to Class II lesions Tx Plan Flashcards
If the proximal caries has NO involvement with the occlusial pits and fissures what is the prep design? What is the design if it does spread to pits and fissures?
no occlusal-slot prep….occ-traditional prep
___% of lesions are cavitated if caries hits the DEJ?
60%
Once the DEJ is invaded, caries professes rapidly. SO MUST _______!
RESTORE
What are the 2 advantages of composites?
aethetics, conservative
What are the 4 dis-advantages to composite?
cost, wear, seal, shrinkage
What are 4 advantages of amalgam?
1.strength 2.wear 3.value 4.corrosion
What are 2 disadvantages of amalgam?
1.aesthetics 2.mercury
What are 3 advantages of GI?
conservative, seal, fluoride
What are 3 disadvantages of GI?
Aesthetics, wear, acid soluble!
How long dose the F- release last in GI?
only the first 2-4 hours
What are the 2 advantages of gold?
Strength and contour
What are the 3 disadvantages to gold?
costs, visits, aesthetics
What are the 3 advantages of ceramic?
aesthetics, contour, longevity
What are 2 disadvantages of ceramics?
costs, visits
What is the first factor in a class II design?
Remove Decay
Keep ridges as thick as possible! More then __mm
1mm!!
The facial extension should be no more then ___mm
0.5mm
The lingual extension is AROUND ___mm
0.5mm
What are the 4 reasons we extend the prep to break contacts?
1.Allow vision 2.Remove excess material 3.place matrix band 4.Avoid damaging adjacent tooth
What is the GINGIVAL separation going to be on a slot prep?
0.5mm
Keep the isthmus ___mm and in the ____ of the F-L of the tooth!
1mm….center
With out your 90 degree angle of departure, the amalgam will be ____ when it is thin in that area.
weak
What is the # source of tooth fracture?
Isthmus width!
The contact area in MOST teeth is typically _____ to the central groove.
facial
For the axial depth-cut into the axial wall at least ___mm PAST the DEJ.
0.5mm
MINIMAL width of the gingival floor is ___mm but depends on the decay/tooth…like for the plastic teeth, PM-___mm…Molars ___-___mm
1.0mm…1.0mm….1.2-1.5mm
Axial wall is going to be _____ to the DEJ.
parallel
MINIMAL depth of the pulpal floor is ___mm and ___mm at the walls.
1.5mm…2.0mm at walls
_______ are permissible on the pulpal floor, BUT if there is ______ under it, take her out.
Enamel Rod islands….staining
Retention grooves- are in ______, follow the _____, do not directly cut into the _____ wall, placed into the _____ and _____ wall and the hight is from the ______ to the ______.
dentin….DEJ…axial…facial and lingual…gingival floor to the pulpal floor
What two directions do the retention grooves prevent displacement of amalgam?
Occlusially and Proximally
Retention grooves-cut to the depth of the _____ bur.
1/4 round bur
Step 1 - ______ form Step 2 - ________ Step 3 - _______ form Step 4 - ________ form
Step 5 - _______ of remaining caries in dentin Step 6 - Finish ______ walls
Step 7 - ________ the cavity preparation
outline…retention…resistance….convenience…removal…enamel…cleanse
The number one rule for Tx recommendations…
INVOLVE the patient in the decisions!!
For maxillary PM’s the _______ extension tends to be a STRAIGHTER line angle, especially in the ____ PM.
lingual…2nd PM
The ______ PM box form tends to be smaller F-L at the mesial c/o smaller contact
1st PM
The mandibular 1st PM prep does NOT cross the ________ ridge. Its a very delicate, small, and challenging prep. Also remember the pulpal floor will be _______.
transverse…angled!
For mandibular 2nd PM’s the prep will follow the ___,__, or ___ groove patterns.
y, c, or h
For mandibular molars, the isthmus tends to be slightly ______ to the central groove in order to keep it in the center of the tooth.
FACIAL
For maxillary molars, Do not cut into the _______ ridge…Dovetail is _______ to oblique ridge…____ groove may oftentimes be involved
oblique…parallel…DL
Which has better corrosion resistance: low-copper amalgam or high-copper amalgam?
High-copper amalgam has better corrosion resistance
Although _____ containing amalgam has 20-50% greater longevity, we don’t use it at ASDOH.
zinc
Dispersalloy is ________ cut AND it has ZINC!
ADMIXED
Megalloy is _______ cut and does not contain zinc.
spherical
Which condenser is always used first?
the small condenser!
For BONDED amalgam, the _____ bond strength is excellent, but long term studies are ______.
initial… mixed
In a matrix band with wings, which end goes gingival?
The wings go gingivally
What do you use an angled tofflemire for?
a lingual approach to the tofflemire
The matrix band is approx ___mm above the prep, and at least ___mm below the gingival margin.
1mm..1mm
The wedge is interred from the _____ OR the largest ______.
lingally…embrasure
Use the ______ wedge possible.
largest
If you have a deep box (haha), insert the _____ matrix band.
winged (love-handle)
A well triturated amalgam should be ______ and pliable.
shiney
When burnishing you move from ______ to _____ and when carving you move from ______ to ______.
amalgam to tooth….tooth to amalgam
Must wait ____ hours before using a _____ bur to work on amalgam.
24 hours…7404
