intro to amalgam restorations (#30 OB powerpoint) Flashcards Preview

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Flashcards in intro to amalgam restorations (#30 OB powerpoint) Deck (49)
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1

what kind of handpieces do you need for an amalgam restoration

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

2

what color is the extended carve capsul

green

3

Brand
Company
alloy
of our amalgam capsule

Permite C
SDI
Admixed(lathe and spherical particles)

4

color of fast set amalgam capsules

beige

5

where is the mercury in the amalgam capsule

in the colored cap

6

Trituration

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

7

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

the largest end that fits

8

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

spread gently on the pulpal floor

9

description of proper trituration

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

10

description of overtrituration

soupy
difficult to remove from capsule
excess matrix
sets premature

11

description of proper mix due to trituration

shiny and soft, warm as removed from capsule

12

description of undertrituration

grainy
crumble and dull
weak
hard to handle

13

what is condensation

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

14

when is condensation performed

3-4 minutes, to avoid cracks

15

purpose of condensation

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

16

Oregon 2 condensor end sizes

1 and 1.5 mm

17

oregon 4 condesnor end sizes

2 and 2 mm

18

pressure equation

P=F/A

19

pressure given by large and small condensors

large: low
small: high

20

when to use small vs large condensor

small: lathe cut
Large: spherical

21

when to do condensation

in a dry field
right after trituration

22

strokes for condensation

vertical overlapping
pressed into all angles of the preparation

23

description of proper condensation

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

24

direction to condense for 1st increment

added to center and condense from center to periphery

25

how should the larst increment be added

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

26

condensation strokes

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

27

where to use lateral condensation strokes

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

28

why overfill

extract mercury rich matrix to the surface
seal margins

29

extended carving time (condensation time and carving time

condensation: 5min
Carving time: 7 min

30

how should amaglam feel during carving

offer some resistance