intro to amalgam restorations (#30 OB powerpoint)

Question 1

what kind of handpieces do you need for an amalgam restoration

Answer 1

Discoid cleoid carver
1/2 hollenbach carver
Anatomical carver
Large Condenser
Small Condenser
Amalgam Carrier
Pig Tail
Sickle explorer
Mouth mirror

Question 2

what color is the extended carve capsul

Answer 2

green

Question 3

Brand
Company
alloy
of our amalgam capsule

Answer 3

Permite C
SDI
Admixed(lathe and spherical particles)

Question 4

color of fast set amalgam capsules

Answer 4

beige

Question 5

where is the mercury in the amalgam capsule

Answer 5

in the colored cap

Question 6

Trituration

Answer 6

the process by which mercury is allowed to react with alloy powder

Question 7

what end of the amalgam carrier is used to place amalgam in the prep

Answer 7

the largest end that fits

Question 8

what to do with the first increment of amalgam added to the prep

Answer 8

spread gently on the pulpal floor

Question 9

description of proper trituration

Answer 9

uniform consistent mass
shiny surface
smooth
optimal mech properties/compresive strength/tensile strength
optimal physical properties

Question 10

description of overtrituration

Answer 10

soupy
difficult to remove from capsule
excess matrix
sets premature

Question 11

description of proper mix due to trituration

Answer 11

shiny and soft, warm as removed from capsule

Question 12

description of undertrituration

Answer 12

grainy
crumble and dull
weak
hard to handle

Question 13

what is condensation

Answer 13

process of compressing the alloy into the tooth preparation and eliminating all voids

Question 14

when is condensation performed

Answer 14

3-4 minutes, to avoid cracks

Question 15

purpose of condensation

Answer 15

1. securation adaptation of amalgam to the walls, line angles and margins
2. maintains homogeneity and compactness of amalgam by minimizing voids
3. expressing the residual mercury to the surface to form mercury rich matrix that will be later carved out

Question 16

Oregon 2 condensor end sizes

Answer 16

1 and 1.5 mm

Question 17

oregon 4 condesnor end sizes

Answer 17

2 and 2 mm

Question 18

pressure equation

Answer 18

P=F/A

Question 19

pressure given by large and small condensors

Answer 19

large: low
small: high

Question 20

when to use small vs large condensor

Answer 20

small: lathe cut
Large: spherical

Question 21

when to do condensation

Answer 21

in a dry field

right after trituration

Question 22

strokes for condensation

Answer 22

vertical overlapping

pressed into all angles of the preparation

Question 23

description of proper condensation

Answer 23

shiny rich mercury phase is visible as condensation of adequate/hear a crunch

Question 24

direction to condense for 1st increment

Answer 24

added to center and condense from center to periphery

Question 25

how should the larst increment be added

Answer 25

overfilled, going beyond external outline of preparation by 1.0 mm using the large condenser

Question 26

condensation strokes

Answer 26

vertical: perpendicular to long axis or at 45 degrees lateral: parallel of long axis or at 45 degrees

Question 27

where to use lateral condensation strokes

Answer 27

Class I with extension Class I with narrow outline in the groove Class 2 proximal box

Question 28

why overfill

Answer 28

extract mercury rich matrix to the surface | seal margins

Question 29

extended carving time (condensation time and carving time

Answer 29

condensation: 5min | Carving time: 7 min

Question 30

how should amaglam feel during carving

Answer 30

offer some resistance

Question 31

purpose of carving

Answer 31

reproduce the tooth anatomy and contours | remove the mercury rich matrix

Question 32

shape of discoid cleoid

Answer 32

discoid: round Cleoid: pointed claw shape

Question 33

carving instruments used

Answer 33

discoid-cleoid Hollenback Interproximal carver

Question 34

how to do a pull stroke

Answer 34

gentle light pressure, moving carver parallel to the margin rest of tooth and on amalgam tip in the central goove NO fulcrum on the cavosurface margin (submarginal or undercontour then

Question 35

when to do a push stroke

Answer 35

to define the developmental gooves

Question 36

direction of a push stroke

Answer 36

tooth structure to amalgam

Question 37

How to evaluate a restoration

Answer 37

Check cavosurface margin for flash, underfilling, or voids Check anatomy check centric oclusion with acufilm check excursive movements run tip of exploere along Cavosurface margin from tooth to amalgam and vice versa

Question 38

what is ideal carving

Answer 38

restores anatomy outline looks like the prepared cavosurface margin junction of external tooth strucutre should be flush with no excess or deficiencies

Question 39

errors in tooth filling

Answer 39

Open margin Submarginal Flash

Question 40

open margin

Answer 40

break between tooth and amalgam restoration traps food and allows passage for microbes must be redone

Question 41

submarginal

Answer 41

seal between amalgam and the enamal not broken. | less than .2mm, then left, and do enameloplasty

Question 42

problem with flash

Answer 42

if patients bites, it may break and leave a marginal discrepancy

Question 43

treating flash

Answer 43

removed during carving

Question 44

cause of open margin

Answer 44

marginal voids due to inadequate condensation | Carving from amalgam to tooth

Question 45

treating an open margin

Answer 45

replace

Question 46

cause of submarginal area

Answer 46

carving amalgam to tooth

Question 47

detecting submarginal area

Answer 47

explorer catches from amalgam to tooth, but not if tooth to amalgam

Question 48

result of overcarving

Answer 48

submarginal defects | no occlusion

Question 49

result of undercarving

Answer 49

flash remains | poor occlusal anatomy