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
