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Bio Materials > Chapter 4 > Flashcards

Chapter 4 Flashcards

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Biology 101 flashcards
1
Q

All chemicals are capable of causing harm if they are

A

Absorbed into the human body

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2
Q

Particulate matter

A

Can be generated during the manipulation of dental materials

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3
Q

Aerosol

A

A cloud like mist containing microbes

less than 50 microns

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4
Q

Splatter

A

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

more than 50 microns

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5
Q

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

A

Bio-aerosols exceed the capacity of air filtration systems

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6
Q

Hazardous chemical

A

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.
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7
Q

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

A

direct

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8
Q

used in the bonding for ceramic crowns and is extremely dangerous

A

Hydrofluoric acid

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9
Q

How long to flush eyes

A

15 minutes

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10
Q

BPA

A

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

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11
Q

BPA is found in what dental materials

A

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

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12
Q

How to reduce BPA

A
  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
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13
Q

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

A

known

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14
Q

ADA States about amalgam

A

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

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15
Q

Toxicity

A

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

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16
Q

Acute chemical toxicity

A

High levels of exposure over a short time

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

17
Q

Acute chemical toxicity symptoms

A

Felt right away,

Dizziness, syncope, headache, nausea, and vomiting

18
Q

Chronic exposure

A

repeated exposures, usually smaller

19
Q

Chronic exposure symptoms

A

cancer, neurology deficits, and infertility

20
Q

____ is the most important step taken to prevent diseases transmission

A

Hand hygiene

21
Q

Procedure gloves ____ provide adequate protection when handling chemicals

A

do not

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

22
Q

What can we consult to determine compatibility

A

SDS

23
Q

A ___should be worn when mixing or pouring chemicals

A

A rubber or neoprene apron

24
Q

2 ways mercury can be absorbed

A

Skin and inhalation

  • its important to wear utility gloves and mask to clean spills
25
Q

Flash point

A

the lowest temp at which a vapor of a volute substance will ignite with a flash

The low flash point can catch fire easily

26
Q

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

A

low

27
Q

acids used in the manipulation of dental materials

A

Phosphoric
hydrofluoric
hydrochloric

28
Q

basic safe policy for storage

A

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

29
Q

a waste is considered hazardous if it has

A

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

30
Q

Ignitable

A

flammable or combustible

31
Q

Corrosive

A

Highly acidic, pH less than 2.0

or

Basic, pH greater than 12.5

32
Q

Reactive

A

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

33
Q

Toxic

A

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

34
Q

Microbes can survive on gypsums casts for up to

A

7 days

35
Q

A chemical hazard communication has 5 parts

A
  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
36
Q

Fire protection label

A

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

Bio Materials (5 decks)

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