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Dental assisting > chemical, water & waste ch. 23 > Flashcards

chemical, water & waste ch. 23 Flashcards

1
Q

primary methods of chemical exposure inhalation;

A

gases, vapors, dust, chemicals cause direct damage to the lungs

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2
Q

primary method of chemical exposure skin:

A

some chemicals are absorbed through the skin

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3
Q

primary method of chemical exposure ingestion (swallowing)

A

eating in areas which chemicals are used or eating with hands that are contaminated with chemicals

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4
Q

results from high levels of exposure over a short period of time. Caused by a chemical spill in which exposure is sudden

A

acute chemical toxicity

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5
Q

results from many repeated exposures, generally to lower levels, over a longer time- months or even years

A

chronic chemical toxicity

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6
Q

general waste

A

non-hazardous, non-regulated waste.

eg. paper towels, empty food containers

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7
Q

contaminated waste

A

waste that has been in contact with blood or other body fluids. Eg. patient napkins

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8
Q

handling contaminated waste

A

place items such as gloves and patient napkins in a lined trash receptacle.
should be covered with a fitted lid.
should not be overfilled

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9
Q

t/f; never fill an empty container with another substance because a dangerous chemical reaction could occur

A

true

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10
Q

personal chemical protection: Hand protection

A

when using chemical disinfectants, wear a utility type glove made from rubber

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11
Q

personal chemical protection :eye protection

A

protect the eye from fumes and splashes,

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12
Q

personal chemical protection: protective clothing

A

wear rubber or neoprene apron when mixing or pouring chemicals

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13
Q

personal chemical protection: inhalation protection

A

facemasks should be fluid-repellent

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14
Q

why did OSHA issue the hazard communication standard

A

employees have the right to know the identity and hazards of chemicals that they use

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15
Q

hazard communication standard is also known as

A

employee right to know the law

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16
Q

a hazardous chemical is defined as

A

any chemical that has been shown to cause physical or health hazard

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17
Q

the chemical is considered hazardous if it

A

can ignite, react or explode, corrosive, toxic

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18
Q

legislated system to provide info on the dangers & safe handling of materials used in the workplace

A

WHMIS provides

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19
Q

SDS contains

A

health and safety info about every chemical in the office

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20
Q

basic safe policy to store dental medications

A

a dry, cool, dark place where they are not exposed to direct sunlight

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21
Q

three types of infectious waste all labeled with biohazard label

A

blood and blood-soaked material, pathologic waste(extracted teeth), sharps

22
Q

handling of extracted teeth

A

dispose of as general office waste, unless returned to the patient

23
Q

t/f’ do not dispose of extracted teeth containing amalgam with general waste, because the mercury vaporization

A

true

24
Q

classified as hazardous waste

A

biomedical waste

25
Q

managing sharps

A

needles, blades, ortho wires, broken glass must be placed in a sharp container

26
Q

mercury spill kits

A

should be available in dental offices. exposure to mercury is very hazardous

27
Q

t/f; outbreaks of waterborne diseases have occurred in a broad range of facilities

A

true

28
Q

t/f; water from air-water syringes and dental handpieces frequently has bacteria levels that are hundreds or thousands of times GREATER than in drinking water

A

true

29
Q

what are dental workers exposed higher than the general public

A

legionella

30
Q

two communities of bacteria in dental waterlines

A

planktonic (free floating) in the water itself

biofilm- attached to the walls of the waterlines

31
Q

biofilm

A

slim producing bacterial communities that may also harbour fungi, algae and protoza

32
Q

backflow

A

it is possible that saliva may be retracted back into the waterlines during treatment

33
Q

how else can backflow occur

A

when the pt closes their lips around tip-of saliva ejectors

34
Q

what should water quality be at

A

less than 500CFU/ML of heterotrophic water bacteria

35
Q

these systems supply air pressure to a water bottle (reservoir)

A

self-contained reservoirs

36
Q

t/f; dental unit water should be used as an irritant for surgery involving exposure to bone

A

false, SHOULD NOT. use sterile water

37
Q

chemicals can be used to control biofilm in 2 ways

A

periodic or “shock”- treatment with biocidal levels, which kill organisms of chemicals
At the level to kill microorganisms but not harm humans

38
Q

microfiltration cartridge

A

disposable, dramatically reduce the bacterial contamination in DUWL.
Inserted as close to the handpiece or air-water syringe.
should be replaced at least daily

39
Q

flushing water lines

A

All dental water lines and handpieces should be flushed at the start of the day and between patients, and at the end of the day.

40
Q

CDA guidelines of DUWL maintenance

A

avoid heating water for the dental unit
purge all water lines at beginning of the day
run high speed handpieces for minimum 20-30 secs

41
Q

waste that is capable of causing an infectious disease is

A

infectious waste

42
Q

infectious waste that requires special handling, neutralization and disposal

A

regulated waste

43
Q

waste that is capable of having a poisonous affect is

A

toxic waste

44
Q

3 primary methods of chemical exposure

A

inhalation, ingestion, skin contact

45
Q

what are the OSHA requirements regarding an eye wash unit

A

eyewash unit in areas where chemicals are used

46
Q

how long must training records be kept

A

5 years

47
Q

minimum number of separable cells on the surface cells on the surface of a semisolid agar medium that create a visible colony

A

colony-forming units

48
Q

made of small-bore plastic tubing and are used to deliver dental treatment water through dental unit

A

dental unit waterlines

49
Q

container that is used to hold and supply water or other solutions to handpieces and air-water syringes attached to a dental unit

A

self-contained water reservoir

50
Q

where is biofilm found

A

handpiece waterlines, air-water syringe waterlines

51
Q

materials that may emit toxic fumes or explode when brought into contact w/ other materials are

A

reactive

52
Q

t/f; Neoprene is a fluid repellent type material suitable for any kind of potential chemical splashes

A

true

Dental assisting (57 decks)

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