Exam 3: Intro to Class II lesions Tx Plan

Question 1

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?

Answer 1

no occlusal-slot prep….occ-traditional prep

Question 2

___% of lesions are cavitated if caries hits the DEJ?

Answer 2

60%

Question 3

Once the DEJ is invaded, caries professes rapidly. SO MUST _______!

Answer 3

RESTORE

Question 4

What are the 2 advantages of composites?

Answer 4

aethetics, conservative

Question 5

What are the 4 dis-advantages to composite?

Answer 5

cost, wear, seal, shrinkage

Question 6

What are 4 advantages of amalgam?

Answer 6

1.strength 2.wear 3.value 4.corrosion

Question 7

What are 2 disadvantages of amalgam?

Answer 7

1.aesthetics 2.mercury

Question 8

What are 3 advantages of GI?

Answer 8

conservative, seal, fluoride

Question 9

What are 3 disadvantages of GI?

Answer 9

Aesthetics, wear, acid soluble!

Question 10

How long dose the F- release last in GI?

Answer 10

only the first 2-4 hours

Question 11

What are the 2 advantages of gold?

Answer 11

Strength and contour

Question 12

What are the 3 disadvantages to gold?

Answer 12

costs, visits, aesthetics

Question 13

What are the 3 advantages of ceramic?

Answer 13

aesthetics, contour, longevity

Question 14

What are 2 disadvantages of ceramics?

Answer 14

costs, visits

Question 15

What is the first factor in a class II design?

Answer 15

Remove Decay

Question 16

Keep ridges as thick as possible! More then __mm

Answer 16

1mm!!

Question 17

The facial extension should be no more then ___mm

Answer 17

0.5mm

Question 18

The lingual extension is AROUND ___mm

Answer 18

0.5mm

Question 19

What are the 4 reasons we extend the prep to break contacts?

Answer 19

1.Allow vision 2.Remove excess material 3.place matrix band 4.Avoid damaging adjacent tooth

Question 20

What is the GINGIVAL separation going to be on a slot prep?

Answer 20

0.5mm

Question 21

Keep the isthmus ___mm and in the ____ of the F-L of the tooth!

Answer 21

1mm….center

Question 22

With out your 90 degree angle of departure, the amalgam will be ____ when it is thin in that area.

Answer 22

weak

Question 23

What is the # source of tooth fracture?

Answer 23

Isthmus width!

Question 24

The contact area in MOST teeth is typically _____ to the central groove.

Answer 24

facial

Question 25

For the axial depth-cut into the axial wall at least ___mm PAST the DEJ.

Answer 25

0.5mm

Question 26

MINIMAL width of the gingival floor is ___mm but depends on the decay/tooth...like for the plastic teeth, PM-___mm...Molars ___-___mm

Answer 26

1.0mm...1.0mm....1.2-1.5mm

Question 27

Axial wall is going to be _____ to the DEJ.

Answer 27

parallel

Question 28

MINIMAL depth of the pulpal floor is ___mm and ___mm at the walls.

Answer 28

1.5mm...2.0mm at walls

Question 29

_______ are permissible on the pulpal floor, BUT if there is ______ under it, take her out.

Answer 29

Enamel Rod islands....staining

Question 30

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 ______.

Answer 30

dentin....DEJ...axial...facial and lingual...gingival floor to the pulpal floor

Question 31

What two directions do the retention grooves prevent displacement of amalgam?

Answer 31

Occlusially and Proximally

Question 32

Retention grooves-cut to the depth of the _____ bur.

Answer 32

1/4 round bur

Question 33

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

Answer 33

outline...retention...resistance....convenience...removal...enamel...cleanse

Question 34

The number one rule for Tx recommendations...

Answer 34

INVOLVE the patient in the decisions!!

Question 35

For maxillary PM's the _______ extension tends to be a STRAIGHTER line angle, especially in the ____ PM.

Answer 35

lingual...2nd PM

Question 36

The ______ PM box form tends to be smaller F-L at the mesial c/o smaller contact

Answer 36

1st PM

Question 37

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 _______.

Answer 37

transverse...angled!

Question 38

For mandibular 2nd PM's the prep will follow the ___,__, or ___ groove patterns.

Answer 38

y, c, or h

Question 39

For mandibular molars, the isthmus tends to be slightly ______ to the central groove in order to keep it in the center of the tooth.

Answer 39

FACIAL

Question 40

For maxillary molars, Do not cut into the _______ ridge...Dovetail is _______ to oblique ridge...____ groove may oftentimes be involved

Answer 40

oblique...parallel...DL

Question 41

Which has better corrosion resistance: low-copper amalgam or high-copper amalgam?

Answer 41

High-copper amalgam has better corrosion resistance

Question 42

Although _____ containing amalgam has 20-50% greater longevity, we don't use it at ASDOH.

Answer 42

zinc

Question 43

Dispersalloy is ________ cut AND it has ZINC!

Answer 43

ADMIXED

Question 44

Megalloy is _______ cut and does not contain zinc.

Answer 44

spherical

Question 45

Which condenser is always used first?

Answer 45

the small condenser!

Question 46

For BONDED amalgam, the _____ bond strength is excellent, but long term studies are ______.

Answer 46

initial... mixed

Question 47

In a matrix band with wings, which end goes gingival?

Answer 47

The wings go gingivally

Question 48

What do you use an angled tofflemire for?

Answer 48

a lingual approach to the tofflemire

Question 49

The matrix band is approx ___mm above the prep, and at least ___mm below the gingival margin.

Answer 49

1mm..1mm

Question 50

The wedge is interred from the _____ OR the largest ______.

Answer 50

lingally...embrasure

Question 51

Use the ______ wedge possible.

Answer 51

largest

Question 52

If you have a deep box (haha), insert the _____ matrix band.

Answer 52

winged (love-handle)

Question 53

A well triturated amalgam should be ______ and pliable.

Answer 53

shiney

Question 54

When burnishing you move from ______ to _____ and when carving you move from ______ to ______.

Answer 54

amalgam to tooth....tooth to amalgam

Question 55

Must wait ____ hours before using a _____ bur to work on amalgam.

Answer 55

24 hours...7404