Chapter 23 and 24 Key Terms

Question 1

acute exposure

Answer 1

high levels of exposure over a short period

Question 2

chemical

Answer 2

any substance or mixture of substances having a chemical composition and characteristic

Question 3

chemical inventory

Answer 3

list of all substances used in the office that contain chemicals

Question 4

chronic exposure

Answer 4

continuous or repeated contact with a substance over a long period

Question 5

contaminated waste

Answer 5

waste that is contaminated from a potentially infectious body fluid of a patient

Question 6

flammable

Answer 6

materials that are readily capable of catching fire

Question 7

globally harmonized system of classification and labeling of chemicals (GHS)

Answer 7

organization that defines and classifies the hazards of chemical products and communicates thealth and safety information on labels and SDS

Question 8

hazard class

Answer 8

classification that provides a number or name of hazardous properties that present a potential hazard to human health and safety

Question 9

hazard classification

Answer 9

systematic standardized statement that divides health and physical hazards into separate classifications

Question 10

hazard statement

Answer 10

statement assigned to a hazard class and category that describes the nature of the hazards of a chemical, including, where appropriate, the degree of the hazard

Question 11

hazardous waste

Answer 11

waste that poses a risk to humans or to the environment if discarded into landfill or poured down the drain

Question 12

health hazard

Answer 12

chemical, physical or biological exposure that can affect an employee’s short of long term health

Question 13

infectious waste

Answer 13

waste that includes biologic materials capable of transmitting an infectious disease

Question 14

label elements

Answer 14

the pictogram, hazard statement, signal word, and precautionary statement for each hazard class and category

Question 15

oxidizers

Answer 15

type of chemical that will react or cause a chemical to react with oxygen causing a severe fire hazard

Question 16

physical hazard

Answer 16

chemical that can be combustible liquid, a compressed gas, an explosive material, flammable-reactive, or water-reactive and is a health hazard

Question 17

pictograms

Answer 17

graphic elements used on a hazard label to identify the specific hazard class and category

Question 18

product identifier

Answer 18

name or number used for a hazardous chemical on a label or in the SDS

Question 18

precautionary statement

Answer 18

phrase that describes recommended measures to take to minimize or prevent adverse effects from exposure to a hazardous chemical or the improper storage or handling of a hazardous chemical

Question 19

regulated waste

Answer 19

items that have been deemed to pose a risk to humans or the environment and for which disposal is regulated by the state for medical waste and the environmental protection agency (EPA) for chemical waste

Question 20

signal word

Answer 20

two words used on the SDS “warming” for less severe hazard categories and “danger” for more severe hazard categories

Question 21

toxic chemicals

Answer 21

chemicals that can have a fatal or toxic effect to humans

Question 22

toxic waste

Answer 22

waste that can have a toxic effect to humans

Question 23

antiretraction device

Answer 23

mechanism that prevents entry of fluids and microorganisms into waterlines as a result of negative water pressure; also called “suck back”

Question 24

biofilm

Answer 24

slime-producing bacterial communities that can harbor fungi, algae, and protozoa

Question 25

colony-forming units (CFUs)

Answer 25

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

Question 26

dental unit waterline (DUWL)

Answer 26

small-bore tubing usually made of plastic, used to deliver water through a dental unit during dental treatment

Question 27

heterotrophic bacteria

Answer 27

bacteria that use organic carbon as food; protozoa fungi, and most bacterial fall into this category

Question 28

immunocompromised

Answer 28

having a weakened immune system

Question 29

legionella

Answer 29

bacteria that can cause a certain type of pneumonia called legionnaires’ pneumonia

Question 30

microfiltration

Answer 30

process by which contaminated fluid is passed through a pore-sized membrane to separate microorganisms

Question 31

planktonic

Answer 31

describes small organisms that float or drift in bodies of salt water or fresh water

Question 32

self-contained water reservoir

Answer 32

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