07: Power Driven Scalers Flashcards
Driven by Compressed Air
Orbital Tip movement
2,500-7,000 cps
Sonic Scaler
Inexpensive
Low power
Rarely used except where money is a very high concern
What is the threshold for Ultrasonic?
20,000 Hz
Driven by Ceramic Transducer
Linear Tip Movement
Only the Sides of the Tip are active
29,000-50,000
PiAzo
Driven by Madnetostrictive transducer
Elliptical Pattern
20,000-42,000 cps
All sides active
Ultrasonic Scaler (Cavitron)
What don’t you want to do with a Cavitron?
Put the apical end of the tip directly on the tooth
Too hot
What is the nickname for the dark metal magnetostrictive transducer
Stack
Can you clean an ultrasonic in the ultrasonic bath?
Nope. Autoclave
What is microstreaming
picks up blood and debris from the sulcus and washes it out
Endotoxins too
What is irrigation
The tip is water cooled.
You want a steady stream without drowning the patient
What is cavitation
Water bubbles implode due to high frequency.
This builds heat and energy
This energy destroys biofilm/tartar
What are the three adjustable variables
Amplitude
Frequency
Power
Magnitude of change in the oscillating variable
Amplitude
Measure of the number of occurrences of a repeating event per unit of time
Frequency
The ability to increase or decrease the amplitude
Power
What is important to do before using a cavitron on the patient?
Tell the patient what you are going to do.
No cutting surface
Turn it on and show them
Warm them about water spray
