chemical, water & waste ch. 23

Question 1

primary methods of chemical exposure inhalation;

Answer 1

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

Question 2

primary method of chemical exposure skin:

Answer 2

some chemicals are absorbed through the skin

Question 3

primary method of chemical exposure ingestion (swallowing)

Answer 3

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

Question 4

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

Answer 4

acute chemical toxicity

Question 5

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

Answer 5

chronic chemical toxicity

Question 6

general waste

Answer 6

non-hazardous, non-regulated waste.

eg. paper towels, empty food containers

Question 7

contaminated waste

Answer 7

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

Question 8

handling contaminated waste

Answer 8

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

Question 9

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

Answer 9

true

Question 10

personal chemical protection: Hand protection

Answer 10

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

Question 11

personal chemical protection :eye protection

Answer 11

protect the eye from fumes and splashes,

Question 12

personal chemical protection: protective clothing

Answer 12

wear rubber or neoprene apron when mixing or pouring chemicals

Question 13

personal chemical protection: inhalation protection

Answer 13

facemasks should be fluid-repellent

Question 14

why did OSHA issue the hazard communication standard

Answer 14

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

Question 15

hazard communication standard is also known as

Answer 15

employee right to know the law

Question 16

a hazardous chemical is defined as

Answer 16

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

Question 17

the chemical is considered hazardous if it

Answer 17

can ignite, react or explode, corrosive, toxic

Question 18

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

Answer 18

WHMIS provides

Question 19

SDS contains

Answer 19

health and safety info about every chemical in the office

Question 20

basic safe policy to store dental medications

Answer 20

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

Question 21

three types of infectious waste all labeled with biohazard label

Answer 21

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

Question 22

handling of extracted teeth

Answer 22

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

Question 23

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

Answer 23

true

Question 24

classified as hazardous waste

Answer 24

biomedical waste

Question 25

managing sharps

Answer 25

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

Question 26

mercury spill kits

Answer 26

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

Question 27

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

Answer 27

true

Question 28

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

Answer 28

true

Question 29

what are dental workers exposed higher than the general public

Answer 29

legionella

Question 30

two communities of bacteria in dental waterlines

Answer 30

planktonic (free floating) in the water itself | biofilm- attached to the walls of the waterlines

Question 31

biofilm

Answer 31

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

Question 32

backflow

Answer 32

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

Question 33

how else can backflow occur

Answer 33

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

Question 34

what should water quality be at

Answer 34

less than 500CFU/ML of heterotrophic water bacteria

Question 35

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

Answer 35

self-contained reservoirs

Question 36

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

Answer 36

false, SHOULD NOT. use sterile water

Question 37

chemicals can be used to control biofilm in 2 ways

Answer 37

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

Question 38

microfiltration cartridge

Answer 38

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

Question 39

flushing water lines

Answer 39

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.

Question 40

CDA guidelines of DUWL maintenance

Answer 40

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

Question 41

waste that is capable of causing an infectious disease is

Answer 41

infectious waste

Question 42

infectious waste that requires special handling, neutralization and disposal

Answer 42

regulated waste

Question 43

waste that is capable of having a poisonous affect is

Answer 43

toxic waste

Question 44

3 primary methods of chemical exposure

Answer 44

inhalation, ingestion, skin contact

Question 45

what are the OSHA requirements regarding an eye wash unit

Answer 45

eyewash unit in areas where chemicals are used

Question 46

how long must training records be kept

Answer 46

5 years

Question 47

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

Answer 47

colony-forming units

Question 48

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

Answer 48

dental unit waterlines

Question 49

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

Answer 49

self-contained water reservoir

Question 50

where is biofilm found

Answer 50

handpiece waterlines, air-water syringe waterlines

Question 51

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

Answer 51

reactive

Question 52

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

Answer 52

true