Amalgam

Question 1

Dental Amalgam: components

Answer 1

alloy (2 or more powdered metals {silver, tin, zinc, copper}) + liquid mercury

Question 2

Overtrituration vs Undertrituration

Answer 2

over = crumbly, difficult to condense 
under = mushy, grainy

Question 3

Thermal Conductivity

Answer 3

rate which heat flows through material

Amalgam - transmits heat quickly, need cement base [ZOP best]

Question 4

Amalgam Strength

Answer 4

good compressive strength, good abrasion resistance, low tensile (thin areas don’t tolerate force)

Question 5

Isthmus Fracture

Answer 5

fracture across thinnest part of restoration

Question 6

Amalgam Quality

Answer 6

Manufacturer - composition, size/shape of alloy

Dental Team - trituration, condensation, finishing

Question 7

Amalgam Advantages + Disadvantages

Answer 7

A - good marginal seal, compressive strength, easy to manipulate, cheap, long lasting.
D - not tooth colored, tarnish, ditching

Question 8

Recontouring

Answer 8

reduces bulky material to blend w tooth

Question 9

Finishing

Answer 9

contour to remove excess material and produce smooth surface

Question 10

Margination

Answer 10

well adapted junction between enamel and restoration

Question 11

Overextention/Flash

Answer 11

catches from tooth to restoration

Question 12

Submarginal

Answer 12

catches from restoration to tooth

Question 13

Open margin / Ditching

Answer 13

catches both ways