Ultrasonic Scalers (FINAL REVIEW)

Question 1

Piezoelectric operates at a frequency of:

Answer 1

29 kHz-50kHz

Question 2

The stokes with a piezoelectric occur in a ____ pattern via ____ activated by the ceramic handpiece

Answer 2

linear pattern; crystals

Question 3

In a piezoelectric, only the ____ sides are effective in removal of plaque and calculus

Answer 3

lateral

Question 4

The most effective portion of the tip of the piezoelectric is the:

Answer 4

last 2.4 mm

Question 5

The piezoelectric requires ____ water to control heat

Answer 5

less

Question 6

The piezoelectric can be used on patients with:

Answer 6

multiple health issues (asthma, COPD, pacemakers, etc.)

Question 7

What ultrasonic scaler is commonly used in Europe and Asia?

Answer 7

piezoelectric

Question 8

Multiple area-specific tips can be utilized and a special wrench must be used for putting the tip on and off:

Answer 8

piezoelectric

Question 9

This ultrasonic can be used in endodontic treatment when utilizing proper tips:

Answer 9

piezoelectric

Question 10

What ultrasonic scaler is being described?

Are reactivated by dimensional changes in crystal housed within the hand-piece as electricity is passed over the surface of the crystal. The resultant vibration produces tip movement that is primarily linear in direction:

Answer 10

piezoelectric

Question 11

Commonly referred to as brand name “cavitron”

Answer 11

magnetorestrictive

Question 12

What frequency does magnetorestrictive operate at? Compare this to piezoelectric

Answer 12

20-40 kHz; lower frequency

Question 13

The strokes with a magnetorestrictive occur in a ___ pattern via ____

Answer 13

elliptical; stacks of metal sheets

Question 14

magnetorestrictive always requires ______ due to production of heat

Answer 14

water lavage

Question 15

What aspects of the tip of the magnetorestrictive are activated and therefor effective for biofilm and calculus removal?

Answer 15

All aspects

Question 16

With a magnetorestrictive, even though all aspects of the tip are activated, DO NOT use tip for:

Answer 16

calculus removal

Question 17

You should NOT use this type of ultrasonic scaler for patients with pacemaker (unless shielded)

Answer 17

magnetorestrictive

Question 18

What type of ultrasonic scaler is being described?

Using flat metal strips in a stack or a metal rod attached to a scaling tip, electrical currents are supplied to a wire coil in the hand-piece; a magnetic field is created around the stack or rod transducer causing it to constrict. An alternating current then produces an alternating magnetic field that causes the tip to vibrate. The movement is elliptical

Answer 18

magnetorestrictive

Question 19

In a magnetorestrictive- Using flat metal strips in a stack or a metal rod attached to a scaling tip, electrical currents are supplied to a wire coil in the hand-piece; a magnetic field is created around the stack or rod transducer causing it to constrict. An ______ then produces an _____ that causes the tip to vibrate.

Answer 19

alternating current; alternating magnetic field

Question 20

What ultrasonic is being described?

flat metal strips in a stack or a metal rod

Answer 20

Magnetorestrictive

Question 21

What ultrasonic is being described?

dimensional changes in crystals within the hand-piece

Answer 21

Piezoelectric

Question 22

What ultrasonic is being described?

Resultant vibration produces tip movement that is primarily linear in direction

Answer 22

Piezoelectric

Question 23

What ultrasonic is being described?

Electrical currents are supplied to a wire coil in the hand-piece

Answer 23

Magnetorestrictive

Question 24

What ultrasonic is being described?

Magnetic field is created around the stack or rod transducer causing it to constrict

Answer 24

Magnetorestrictive

Question 25

What ultrasonic is being described?

An alternating current then produces an alternating magnetic field that causes the tip to vibrate

Answer 25

Magnetorestrictive

Question 26

T/F: Both the piezoelectric and magnetorestrictive ultrasonic scalers require water for heat dissipation and both use electricity to vibrate the tip:

Answer 26

Both true

Question 27

Which ultrasonic scaler requires more water?

Answer 27

Magnetorestrictive (Cavitron)

Question 28

What setting power setting for the cavitron would be used for the following situation?

Biofilm removal and light sub gingival deposits

Answer 28

low

Question 29

What setting power setting for the cavitron would be used for the following situation:

General debridement of biofilm and calculus deposited

Answer 29

medium

Question 30

What setting power setting for the cavitron would be used for the following situation:

Removal of heavy, tenacious calculus deposits:

Answer 30

high

Question 31

When adjusting the power of a cavitron you also need to:

Answer 31

adjust the water accordingly