Chapter 24 - Dental Unit Waterlines

Front 1

Antiretraction device



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Back 1

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

Front 2

Biofilm



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Back 2

Slime-producing bacterial communities that may also harbor fungi, algae, and protozoa.

Front 3

Colony-forming units (CFUs)



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Back 3

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

Front 4

Dental unit waterline (DUWL)

Back 4

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

Front 5

Heterotrophic bacteria



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Back 5

Bacteria that use organic carbon as a source of nutrients. Protozoa, fungi, and most bacteria fall into this category.

Front 6

Immunocompromised



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Having an immune system that is weakened.

Front 7

Legionella



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Genus of bacteria responsible for the disease legionellosis

Front 8

Microfiltration



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Use of membrane filters to trap microorganisms suspended in water.

Front 9

Planktonic



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Describes bacteria that are freely floating in water

Front 10

Self-contained water reservoir


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Back 10

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