Amalgam

Question 0

Contraction of amalgam is due to?

Answer 0

Overtrituration

Question 1

Expansion of amalgam is due to?

Answer 1

Contamination with moisture

Question 2

Undertrituration of amalgam will result to?

Answer 2

Expansion

Question 3

Contamination of amalgam will cause? (4)

Answer 3

• delayed setting
• reduced strength
• postoperative pain
• corrosion

Question 5

Component of amalgam that produce H+ gas upon contamination, which will cause porosities?

Answer 5

Zinc

Question 6

True or false: A good consistency of amalgam should not retain thumb print when pressed

Answer 6

False. It should retain thumb print

Question 7

True or false: A good consistency of amalgam should not adhere on the walls of the mortar

Answer 7

True

Question 8

Steps in manipulation of amalgam (7)

Answer 8

1 proportioning
2 trituration
3 mulling
4 condensation
5 carving
6 polishing

Question 9

Proportion of capsule form of amalgam

Answer 9

5:5

Question 10

Manual trituration of amalgam (in secs)

Answer 10

30-45 secs

Question 11

Fingers used during mulling

Answer 11

• middle finger

- thumb

Question 12

Cleiod or discoid: use to remove excess layer

Answer 12

Discoid

Question 13

Cleiod or discoid: use to restore grooves

Answer 13

Cleiod

Question 14

Signs and symptoms of mercurial poisoning (3)

Answer 14

• headache
• drowsiness
• tremor of the hand

Question 15

Mechanical trituration of amalgam (in secs)

Answer 15

7-10 secs

Question 16

Required thickness of matrix band

Answer 16

0.002-0.0015 in