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Dental Hygiene 2 > Module 2 Ultrasonics > Flashcards

Module 2 Ultrasonics Flashcards

1
Q

What are the 3 main modes of action of an ultrasonic scaler?

A

Mechanical
Cavitation
Irrigation

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2
Q

Sonic Scalers use what form of energy?

A

air pressure

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3
Q

Ultrasonic Scalers use what form of energy?

A

electrical

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4
Q

What is required to dissipate the heat produced at the vibrating tip?

A

water

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5
Q

Cavitation is the action created by the formation and collapse of _____ in the water?

A

bubbles

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6
Q

Cavitation can remove ______ from root surface and can destroy?

A

endotoxins

surface bacteria

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7
Q

Amplitude is the distance of ______which determines?

A

tip movement

power output

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8
Q

Is amplitude adjustable?

A

yes

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9
Q

Frequency is the _____of the tip movement?

A

speed

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10
Q

Frequency is measured in?

A

cycles per second

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11
Q

Amplitude is measured in?

A

mm

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12
Q

What are the 3 types of power-driven scalers?

A

Sonic
Magnetostrictive
Piezoelectric

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13
Q

Vibrations and heat from the ultrasonic may damage ______ in children?

A

pulp tissue

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14
Q

You should avoid areas of ______ and ____ when using the ultrasonic?

A

demineralization

exposed dentin

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15
Q

Powered scalers can decrease risk of _____ in clinicians?

A

carpal tunnel

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16
Q

Constant _____ of instrument, correct ______ and ample _______ are essential to safe operation of ultrasonic devices?

A

motion
angulation
water

17
Q

What kind of tips are used on low power and effective for fine scaling and root planning?

A

diamond coated

18
Q

Excessive lateral pressure can cause damage to ______, ______Of calculus, and _____ of tip vibrations?

A

tooth
burnishing
deactivation

19
Q

A US tip w/out power can be used as a _____only?

A

probe

20
Q

A __ to _____mm loss in length of US tip renders the tip ineffective?

A

2-3

21
Q

T/F the gingival changes are apparent immediately after instrumenting?

A

F

22
Q

The sulcus can be gently probed after _____time frame after tx.

A

2wk

23
Q

When should pt. instructions be presented following periodontal instrumentation?

A

at end of each appt.

24
Q

What 3 solutions are soothing to gingiva after periodontal instrumentation?

A

Salt water
Sodium bicarbonate
Chlorhexidine

25
Q

There is a shift from _____ gram______ to ______gram ______ after periodontal instrumentation?

A

anaerobic -

aerobic +

26
Q

Without personal daily biofilm control the germs can return to pretreatment levels within ___days

A

42

Dental Hygiene 2 (19 decks)

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