Lab 5: Amalgam Condensing/Carving

Question 1

types of amalgam

Answer 1

• dispersed phase (dispersalloy)

- spherical (tytin)

Question 2

setting speeds of amalgam

Answer 2

• slow (6 min. working time)
• regular (4-5 min)
• fast (3 min)

Question 3

size of amalgam

Answer 3

1 spill (0.8g)
2 spill (1.2g)
3 spill (1.6g)

Question 4

gram weight of 1-spill

Answer 4

0.8g

Question 5

gram weight of 2-spill

Answer 5

1.2g

Question 6

gram weight of 3-spill

Answer 6

1.6g

Question 7

what do we use in operative preclinic?

Answer 7

dispersalloy (dispersed phase), regular set, 2-spill

Question 8

amalgam is a ________

Answer 8

high copper alloy

Question 9

occlusal surfaces shaped by _____ called the _______

Answer 9

egg burnisher, pre-carving burnish

Question 10

in carving, keep walls 3 carver ____ to cavosurface margin to prevent gouging

Answer 10

perpendicular

Question 11

irregular bits of material; what can they be removed by?

Answer 11

bits, walls 3/half hollenbeck,

Question 12

amalgam initially condensed in a ____ fashion, ______ to create a fish-scale look

Answer 12

step-wise, overlapping

Question 13

pre-carving burnisher in Class I

Answer 13

egg-burnisher

Question 14

pre-carving burnisher in Class V

Answer 14

PKT 3

Question 15

patients should not chew ____ for 24 hours (due to waiting for full strength of materials)

Answer 15

hard foods

Question 16

1 hour after, material is at ___% of final strength

Answer 16

60%

Question 17

24 hours after, material is at ___% of final strength

Answer 17

90%

Question 18

new amalgam restorations may be sensitive to ___, due to ______

Answer 18

micro-leakage

Question 19

name for mixing amalgam in machine

Answer 19

trituration (mixing)

Question 20

working time for amalgam that we’re using

Answer 20

4.5 minutes

Question 21

time from trituration until amalgam looses plasticity and becomes crumbly

Answer 21

working time

Question 22

3 goals of condensation

Answer 22

• adapting to walls/angles/margins
• eliminating air voids/porosity
• eliminating mercury-rich material