Ultrasonic Scalers (Final Review) Flashcards
Piezoelectric operaties at a frequency of:
29-50 kHz
The strokes with a Piezoelectric occur in a _____ pattern via _____ activated by the ceramic handpiece
Linear; crystals
In a Piezoelectric, only the ____ sides are effective in the removal of plaque and calculus
lateral
The most effective portion of the tip of the Piezoelectric is the:
last 2.4mm
The Piezoelectric requires _____ water to control heat
less
The Piezoelectric can be used on patients with:
multiple health issues (asthma, COPD, pacemakers, etc.)
What ultrasonic scaler is commonly use in Europe & asia
Piezoelectric
Multiple area-specific tips can be utilized and a special wrench must be used for putting tip on & off:
Piezoelectric
This ultrasonic can be used in endodontic treatment when ultilizing proper tips:
Piezoelectric
What ultrasonic scaler is being described?
Are reactivated by dimensional changes in crystals housed within the hand-piece as electricity is passed over the surface of the crystals. The resultant vibration produces tip movement that is primarily linear in direction:
Piezoelectric
Commonly referred to as brand name “cavitron”
Magnetostrictive
What frequency does Magnetostrictive operate at? Compare this to piezoelectric:
20-40 kHz
lower frequency
The strokes of a Magnetostrictive occur in a _____ pattern via _____
elliptical pattern; stacks of metal sheets
Magnetostrictive always requires _____ due to production of heat
water lavage
What aspects of the tip of a Magnetostrictive are activated & therefore effective for biofilm & calculus removal?
all aspects
With a Magnetostrictive even though all aspects of the tip are activated, do not use tip for:
Calculus removal
You should use this type of ultrasonic scaler on patients with pacemaker (unless shielded):
Magnetostrictive
What type of ultrasonic scaler is being described?
Using flat metal strips in a stack or metal rod attached to a scaling tip, electrical currently are supplied to a wire coil in the hand-piece; a magnetic field is created around the stack of rod transducer causing it to constrict. An alternating current then produces an alternating magnetic field that causes the tip to vibrate:
Magnetostrictive
In a magnetorestrictive, using flat metal strips in a stack or metal rod attached to a scaling tip, electrical currently are supplied to a wire coil in the hand-piece; a magnetic field is created around the stack of rod transducer causing it to constrict. An ____ then produces an _____ that causes the tip to vibrate
alternating current; alternating magnetic field
What ultrasonic is being described?
Flat metal strips in a stack or a metal rod
Magnetorestrictive
What ultrasonic is being described?
Dimensional changes in crystals within a handpiece
piezoelectric
What ultrasonic is being described?
Resultant vibration produces tip movement that is primarily linear in direction
Piezoelectric
What ultrasonic is being described?
Electrical currents are supplied to a wire in the hand-piece
Magnetorestrictive
What ultrasonic is being described?
Magnetic field is created around the stack or rod transducer causing it to constrict
Magnetorestrictive
What ultrasonic is being described?
An alternating current then produces an alternating magnetic field that causes the tip to vibrate
Magnetorestrictive
T/F: Both the piezoelectric & magnetorestrictive ultrasonic scalers require water for heat dissipation, and both use electricity to vibrate the tip
Both true
Which ultrasonic scaler requires more?
Magnetorestrictive
What power setting for the cavitron would be used for the following situation?
Biofilm removal & light subgingival deposits
Low
What power setting for the cavitron would be used for the following situation?
General debridement of biofilm and calculus deposits
Medium
What power setting for the cavitron would be used for the following situation?
Removal of heavy, tenacious calculus deposits
High
When adjusting the power of a cavitron you also need to:
adjust the water accordingly
