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
