Amalgam

Question 1

amalgam is mixture of what

Answer 1

silver-tin and mercury

Question 2

advantages of amalgam

Answer 2

1. Ease of use
2. High compressive strength . 3.Excellent wear resistance.
3. Favorable long-term clinical research results
4. Low cost

Question 3

disadvantages of amalgam

Answer 3

1. nonesthatic
2. Noninsulating
3. Less conservative tooth preparation than for composite
   4.More difficult tooth preparation than for composite
   5.Initial marginal leakage

Question 4

does amalgam bond?

Answer 4

NO

Question 5

pulpal floor on amalgam class I preparation should be….to maintain Resistance form?

Answer 5

Sufficient areas of relatively flat pulpal floor to resist forces directed along the long axis of the tooth

Question 6

depth on amalgam class I preparation should be…to maintain Resistance form?

Answer 6

1.5-2.0mm, 0.5 deep into dentin

Question 7

margins on amalgam class I preparation should be…to maintain Resistance form?

Answer 7

90O cavosurface margins supported by sound dentin

Question 8

walls on amalgam class I preparation should be…to maintain Resistance form?

Answer 8

parallel to enamel rod direction

Question 9

internal preparation angles on amalgam class I preparation should be…to maintain Resistance form?

Answer 9

rounded

Question 10

what makes the primary retention on amalgam restoration?

Answer 10

-Frictional retention
-Conversion wall ( B,L)

Question 11

what makes the secondary retention on amalgam restoration?

Answer 11

grooves , slot, pins.

Question 12

Good shiny mix;
Homogeneous mass, adheres together
indicate that the trituration was?

Answer 12

Normal trituration

Question 13

Mix is «warm»; Shiny wet and soft.
indicate that the trituration was?

Answer 13

Over trituration

Question 14

Crumbled mix that is very weak
indicate that the trituration was?

Answer 14

Under trituration: − Drymix