Test 2

Question 1

When discussing amalgam safety in dentistry what type of mercury is involved

Answer 1

element mercury

Question 2

Evidence of elevated levels of mercury in the body is usually found

Answer 2

Urine

Question 3

An allergy to amalgam is slightly more common than an allergy to resin, but the allergy to amalgam is less common than an allergy to glass ionomer True or false

Answer 3

Both false

Question 4

When placing amalgam into a cavity preparation it is better to use the small end of the amalgam condenser first true or false

Answer 4

false

Question 5

what characteristics of the tooth structure is not a characteristic of dental amalgam

Answer 5

high coefficient of thermal expansion

Question 6

what is not an advantage of all spherical amalgam alloys

Answer 6

it should be easier to get contact with an adjacent tooth on a class 2 restoration

Question 7

what is the most common amalgam alloy and what are its two components

Answer 7

admixed, made of spherical and lathe

Question 8

One result of the process of dispersion hardening of amalgam is that copper can be added to the alloy in place of tin true or false

Answer 8

false

Question 9

Final strengths of dental amalgam are typically reached when

Answer 9

1 month after restoration

Question 10

what is a major characteristic of amalgam and is an advantage to using it

Answer 10

high compressive strength

Question 11

what is a disadvantage and characteristic of amalgam

Answer 11

low tensile and shear strength

Question 12

which property of amalgam is vunerable to corrosion and is the weakest link

Answer 12

Gamma 2 (y2)

Question 13

repeated occlusal loading over a short period of time

Answer 13

flow

Question 14

repeated occlusal loading over a long period of time

Answer 14

creep

Question 15

what is most common admixed amalgam used in clinic

Answer 15

Valiant

Question 16

modern amalgams include what four metals

Answer 16

cooper, tin, steel and mercury

Question 17

amalgams are generally used for what teeth and which class preps

Answer 17

posterior teeth, class 1,2,5

Question 18

the conduction of electrical forces between amalgam and gold

Answer 18

galvanic reaction

Question 19

Adequate Condensation of dental amalgam into a cavity prep requires what three things

Answer 19

maximum force, suitable size condenser, small increments

Question 20

how is mercury most likely to be absorbed into the body

Answer 20

through the respiratory tract

Question 21

who developed the modern dental amalgam

Answer 21

G. V. black

Question 22

the modern amalgam that we use today has what amount content of copper

Answer 22

high copper content

Question 23

this can occur during an amalgam removal, has no hard as the particles adhere to the tissue in mouth

Answer 23

amalgam tattoo

Question 24

• no corrosion
• less expansion
• operator technique
• preparation variables • higher survival rates

These are example of what type of copper amalgam

Answer 24

high copper amalgam

Question 25

the ideal amalgam of choice should show what two characteristic

Answer 25

low creep levels and high resistance to corrosion

Question 26

mercury exists everywhere in environment, another term for this is

Answer 26

Ubiquitous

Question 27

main source of mercury is

Answer 27

fossil fuels and industrial plants

Question 28

common mercury used in dentistry is un-ionized mercury

Answer 28

element

Question 29

oxidized or ionized form of mercury, can be toxic as an inorganic salt, found in batteries

Answer 29

inorganic mercury

Question 30

methyl mercury, most toxic form

Answer 30

organic mercury

Question 31

amalgam will eventually be replaced by what

Answer 31

composite and other esthetic materials

Question 32

what has a higher cytotoxcity than amalgam

Answer 32

composite resin

Question 33

which of the following phases in a conventional dental amalgam is the most likely to corrode

Answer 33

gamma 2

Question 34

Properties of diffusion type amalgam

Answer 34

strength and low corrosion