Chapter 4

Question 1

All chemicals are capable of causing harm if they are

Answer 1

Absorbed into the human body

Question 2

Particulate matter

Answer 2

Can be generated during the manipulation of dental materials

Question 3

Aerosol

Answer 3

A cloud like mist containing microbes

less than 50 microns

Question 4

Splatter

Answer 4

Small particles that contain blood,saliva,oral, particulate matter, water, and microbes

more than 50 microns

Question 5

employees suffer from allergic responses, infectious diseases, and respiratory problems if…

Answer 5

Bio-aerosols exceed the capacity of air filtration systems

Question 6

Hazardous chemical

Answer 6

Any chemical that has been show to cause a physical or health hazard

• can be a substance that can catch fire, react or explode when mixed with other substances, or corrosive or toxic.

Question 7

The skin must be in ____ contact of a chemical for harm to happen

Answer 7

direct

Question 8

used in the bonding for ceramic crowns and is extremely dangerous

Answer 8

Hydrofluoric acid

Question 9

How long to flush eyes

Answer 9

15 minutes

Question 10

BPA

Answer 10

Bisphenol A, used to harden plastics and to line water pipes, and metal food and beverage cans.

Question 11

BPA is found in what dental materials

Answer 11

Polycarbonate plastics, and epoxy resins
- used is some dental sealants and composites

Question 12

How to reduce BPA

Answer 12

1. Properly cure resin (Uncured releases BPA)
2. Wipe off uncured layer
3. good placement technique (rubber dam, 4-handed dentistry, w/ high volume suction)
4. Using High volume suction

Question 13

There is a ___ health risk to dental personnel from exposure to elemental mercury

Answer 13

known

Question 14

ADA States about amalgam

Answer 14

Scientific evidence supports the position that amalgam is a valuable, viable, and safe choice for dental patients.

Question 15

Toxicity

Answer 15

the strength if a product/chemical to cause damage to the body

Question 16

Acute chemical toxicity

Answer 16

High levels of exposure over a short time

freq. caused by a large chemical spill, sudden and unexpected

Question 17

Acute chemical toxicity symptoms

Answer 17

Felt right away,

Dizziness, syncope, headache, nausea, and vomiting

Question 18

Chronic exposure

Answer 18

repeated exposures, usually smaller

Question 19

Chronic exposure symptoms

Answer 19

cancer, neurology deficits, and infertility

Question 20

____ is the most important step taken to prevent diseases transmission

Answer 20

Hand hygiene

Question 21

Procedure gloves ____ provide adequate protection when handling chemicals

Answer 21

do not

-treatment gloves can actually pull contaminants and chemicals through the gloves and onto the hands

Question 22

What can we consult to determine compatibility

Answer 22

SDS

Question 23

A ___should be worn when mixing or pouring chemicals

Answer 23

A rubber or neoprene apron

Question 24

2 ways mercury can be absorbed

Answer 24

Skin and inhalation

• its important to wear utility gloves and mask to clean spills

Question 25

Flash point

Answer 25

the lowest temp at which a vapor of a volute substance will ignite with a flash The low flash point can catch fire easily

Question 26

Many solvents used with dental materials have a very ____ flash point

Answer 26

low

Question 27

acids used in the manipulation of dental materials

Answer 27

Phosphoric hydrofluoric hydrochloric

Question 28

basic safe policy for storage

Answer 28

cool, dry, dark place, not exposed to direct sunlight

Question 29

a waste is considered hazardous if it has

Answer 29

certain properties or chemicals that could pose dangers to human health and the environment after being discarded

Question 30

Ignitable

Answer 30

flammable or combustible

Question 31

Corrosive

Answer 31

Highly acidic, pH less than 2.0 or Basic, pH greater than 12.5

Question 32

Reactive

Answer 32

unstable or explosive, reacts violently with water, or is capable of giving off toxic fumes when mixed with water

Question 33

Toxic

Answer 33

if it contains arsenic, barium, chromium, mercury, lead, silver, or certain pesticides

Question 34

Microbes can survive on gypsums casts for up to

Answer 34

7 days

Question 35

A chemical hazard communication has 5 parts

Answer 35

1. Written hazard communication program (all workers exposed, safety info, act.) 2. Chemical Inventory 3. Safety data sheet (health and safety info about each chemical in the office) 4. Labeling of containers 5. Employee training

Question 36

Fire protection label

Answer 36

blue- health Red- Flammability Yellow- reactivity White- special hazard symbols, like "OXY" for oxidizers