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Flashcards in QUIZ Power Scaling Deck (21)
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1

Frequency

How many times an electronically powered instrument tip vibrates per second

2

Amplitude

stroke. measure of how far the instrument tip moves back and forth during one cycle

3

Describe the two types of powered instrumentation technology

Sonic: operate at a relatively low frequency to 3,000-8,000 cycles per second and are driven by compressed air from the dental unit

Ultrasonic:
operate inaudibly at 18,000 to 45,000 cycles per second kHz.. Ultrasonic devices can be further categorized into magnetostrictive and piezoelectric based on the mechanism used to convert the electrical current used for energy to activate the tips

4

Use electrical energy to activate crystals within the handpiece to vibrate the tip

Piezoelectric ultrasonic instrument

5

Cleaning efficiency

determined by a combination of frequency and amplitude. Frequency determines the # of vibrations, whereas amplitude determines the length of each stroke.

Combo of low frequency and low amplitude is ideal for disruption of plaque biofilm from root surfaces deplaquing

Combo of high frequency/high amplitutde is ideal for tenacious calculus deposits

6

Discuss medical and dental contraindications for powerscaling

pg636
-Communicable disease
-High susceptibility
-Respiratory risk
- Unshielded cardiac pacemaker
- Difficulty in swallowing or prone to gagging
-Age
- Oral conditions

look at notability for graph detailed

7

Does higher amplitutde deleiver a shorter less powereful stroke or longer more powerful stroke

longer more powerful stroke

8

Describe how you would determine the correct selection of ultrasonic inserts/tips based on their powered working end designs

1. Determine Diameter
Standard Diameter :
-Standard diameter
-Shorter shank lanks
-Heavy deposit removal: Supragingival use and for subgingival deposits easily accessed without undue tissue stretching

Slim Diameter:
-40 % smaller in diameter
-Longer shank lengths
- Light deposits and deplaquing
-Debridement of root concavities and furcation areas

2. Look at cross section
- rectangular, trapezoidal, beveled more effecitve calculus removal
- round cross section are for removal of plaque biofilm

3. Start with standard diameter then use slim diamater tips

9

What setting due you use for standard diameter tip

medium to medium high

10

what setting do you use for straight slim diameter tips

low power

11

what setting do you use for curved slim diameter tps

low power

12

The __ effective power setting should always be used during powered instrumentation

lowest

13

Describe the various modes of action used in powerscaling

all tips use elliptical motion. longer slimmer probes are more prone to ellipital motion

Lateral surfaces are recommend to use against tooth for all sonic, piezoelectric, magnetostrictive ultrasonic instruments

14

__ water flow is recommended for calculus removal. __ water flow is recommended for deplaquing

more
less

15

For calculus removal should your ultrasonic tip have water misting or dripping

misting

16

The __ of a powered instrument is never adapted directly on a tooth surfaces

tip

17

Describe the type of pressure applied during powered instrumentation and explain how incorrect pressure could negatively impact the effectiveness of powerscaling.

light relaxed grasp
light to no lateral pressure
digital finger activation

If you use moderate to firm pressure it will decrease the effectiveness of the instrument tip and can even stop the tip vibrations together

18

The power to remove calculus is concentrated in the last __ ___mm of length of a powered insturment tip

2 to 4mm

19

The tip to tooth surface angulation should be as close to 0 degrees and never exeed

15 degrees

20

A powered instrument works from __ of deposit __ starting near the CEJ and working toward the base of pocket

top
downward

21

__ and __ strokes are more effective in removing large tenacious calculus depoists

slow reptitive