Dental Power Instruments
How do power scalers work? - ✔✔ correct answer they convert electric or pneumatic energy into
mechanical vibration which remove deposits on teeth
How are the vibrations of power scalers measured? - ✔✔ correct answer measured by frequency or
number of times the tip moves back and forth in 1 second (cps or hz)
What are the two types of power scalers? - ✔✔ correct answer ultrasonic (most common)
sonic
Which power scaler converts electrical energy from power source into a sound wave which is picked
up at handpiece and is converted into vibration? - ✔✔ correct answer ultrasonic scaler
Which type of ultrasonic scaler vibrates at 18,000, 25,000 and 42,000 cps and works in an elliptical
motion with an 0.8-1.1mm amplitude? - ✔✔ correct answer metal stacks
Which magnetostrictive ultrasonic scaler tends to generate more heat which can result in more
enamel damage? - ✔✔ correct answer metal stacks
Which ultrasonic scaler requires the handpiece be filled with water before insertion? - ✔✔ correct
answer metal stacks
Which ultrasonic scaler vibrates at 42,000 cps only and works in a circular motion at 0.02 amplitude?
- ✔✔ correct answer ferroceramic rod
Which ultrasonic scaler generates little to no heat and can be used to clean subgingivally up to
13mm? - ✔✔ correct answer ferroceramic rod
Which ultrasonic scaler requires that the handpiece is drained before insertion of insert? - ✔✔
correct answer ferroceramic rod
Which ultrasonic scaler uses crystals or ceramic discs in the handpiece to pick up vibration? - ✔✔
correct answer piezoelectric
Which ultrasonic scaler ranges from 25,000 to 45,000 cps and works in a linear motion at an
amplitude of 0.2mm? - ✔✔ correct answer piezoelectric
How do power scalers work? - ✔✔ correct answer they convert electric or pneumatic energy into
mechanical vibration which remove deposits on teeth
How are the vibrations of power scalers measured? - ✔✔ correct answer measured by frequency or
number of times the tip moves back and forth in 1 second (cps or hz)
What are the two types of power scalers? - ✔✔ correct answer ultrasonic (most common)
sonic
Which power scaler converts electrical energy from power source into a sound wave which is picked
up at handpiece and is converted into vibration? - ✔✔ correct answer ultrasonic scaler
Which type of ultrasonic scaler vibrates at 18,000, 25,000 and 42,000 cps and works in an elliptical
motion with an 0.8-1.1mm amplitude? - ✔✔ correct answer metal stacks
Which magnetostrictive ultrasonic scaler tends to generate more heat which can result in more
enamel damage? - ✔✔ correct answer metal stacks
Which ultrasonic scaler requires the handpiece be filled with water before insertion? - ✔✔ correct
answer metal stacks
Which ultrasonic scaler vibrates at 42,000 cps only and works in a circular motion at 0.02 amplitude?
- ✔✔ correct answer ferroceramic rod
Which ultrasonic scaler generates little to no heat and can be used to clean subgingivally up to
13mm? - ✔✔ correct answer ferroceramic rod
Which ultrasonic scaler requires that the handpiece is drained before insertion of insert? - ✔✔
correct answer ferroceramic rod
Which ultrasonic scaler uses crystals or ceramic discs in the handpiece to pick up vibration? - ✔✔
correct answer piezoelectric
Which ultrasonic scaler ranges from 25,000 to 45,000 cps and works in a linear motion at an
amplitude of 0.2mm? - ✔✔ correct answer piezoelectric
