Exam 3 Power Scaling Flashcards Preview

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Flashcards in Exam 3 Power Scaling Deck (49)
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1

What are powered instruments:
Instrument with a rapidly vibrating tip used to __ ___ and ___ ___ ____ from tooth and root surfaces, and to __ out bacteria from beneath the gingival margin

dislodge calculus
disrupt plaque biofilm
flush

2

What are the benefits of power scaling?

- Effective calculus and biofilm removal
- Pocket penetration/accessing furcations
- Irrigation (lavage)- healing
- Shorter instrumentation time- fatigue
- Restoration recontour/cement removal
- No sharpening- no cutting edge

3

2 types of powered instrumentation: ____ & _____
Classified based on ____

Sonic and Ultrasonic

operating frequencies

4

-Operates at a low frequency of 3,000-8,000 cycles/second.

-Driven by compressed air from the dental unit.

Sonic

5

-Operate inaudibly at a frequency of 18,000-50,000 cycles/second

-Driven by electrical current

Ultrasonic

6

2 SUBTYPES OF ULTRASONIC

Piezoelectric
Magnetostrictive

7

Electrical energy activates ceramic crystals or rings within the handpiece to make the tip vibrate

Piezoelectric

8

Electronic energy is transferred to metal stacks or rods or to make the tip vibrate.

Magnetostrictive

9

Is the power box of a powered unit
- Non-critical
- Semi critical
- Critical

Non critical

10

Is the handpiece of a powered unit
- Non-Critical
- Semi critical
- Critical

Semi Critical

11

Is the handpiece TIP
- Non critical
- Semi critical
- Critical

Critical

12

Do you need to sterilize the handpeice for cavitron and peizo after evey use

every use

13

Scaler Tip Motion:
Magnetostrictive

Orbital tip motion

14

Scaler Tip Motion:
Piezoelectric

Linear tip motion

15

3 Modes of Action (How it Works)

1. Mechanical Removal
2. Water Irrigation
3. Cavitation

16

Water Irrigation:
Rapid vibrations of tip against tooth causes ___ ____- water stream cools tip

frictional heat

17

Water stream within the pocket washes
away toxins, blood and bacteria within the pocket

Lavage

18

Tiny bubbles formed by water
stream. Bubbles collapse, which produces
shock waves that may alter or destroy bacterial
cell walls.

Cavitation

19

How many times the tip vibrates per second (kHz)

Frequency

20

Which unit ??
1.25,000-50,000
2.25,000- 42,000 kHz.
3. 1500-8000 kHz

1. Piezoelectric units frequency
2. Magnetostrictive units frequency
3. Sonic units frequency

21

How far the instrument tip moves back and forth during one cycle. (length of stroke)

Amplitude

22

shorter distance = lower power

Lower Amplitude

23

higher distance = higher power

Higher amplitude

24

Controlled through power knob on unit. Always use lowest effective power setting. Low for soft deposit removal and medium for hard deposit removal.

Amplitude

25

more forceful stroke =
patient discomfort. (pain)

Higher power

26

less forceful stroke = patient discomfort. (more comfortable for patient)

Lower power

27

less water going through tip

warmer water

28

Use __ water for calculus removal and ___ water for deplaquing

more
less

Calculus removal halo
de-plaquing drip

29

Light to moderate calculus
Improved for subgingival access due to 30% thinner than powerlines

Slimeline 10 and 1000 (triple bend)

Cavitron ultrasonic insert

use pictures

30

Moderate to heavy calculus
Thicker inserts with larger tips, specifically designed for efficient removal of heavier deposits

Powerline 10
Cavitron ultrasonic insert