W2: Perio- Ultrasonic Scalers

Question 1

Describe the characteristics of the piezoelectric ultrasonic, including tip motion, cavitation, acoustic streaming and irrigation

Answer 1

• Tip: thin access pockets and Class2/3 furcations, rmeoves less cementum, reduced MB to 0.1% by vibration
• cavitation: disrupt biofilm, wash out biofilm in pocket

Ultrasonic action creates microfractures in calcified deposits and breaks the bonds that connect
the deposit to the tooth surface.
– Fine deposits are often pulverized, resulting in a slurry of debris that is visible in the water at the back of the mouth.

Question 2

Describe pre-use assessment for piezo use

Question 3

Understand and discuss the contraindications for use

Answer 3

Question 4

List the Advantages and Disadvantages of Piezo use

Answer 4

Question 5

Identify the key principles of tip selection and appropriateness of
power level selection

Answer 5

Ultrasonic unit is powered by electric current
– Mechanism of action:
- electricity is transformed within unit to produce movement of tip
– Three main types:
1) Magnetostrictive
2) Piezoelectric
3) Sonic (using compressed air)

Question 6

Describe the proper set up and technique of the Piezoelectric ultrasonic scaler

Answer 6

The smooth linear movement
generated by piezoelectric
systems create a stroke pattern
that is similar to hand
instrumentation. Adapting the
lateral surface of the piezo tip
against the tooth surface (similar
to a hand instrument) will increase
clinical efficiency

Question 7

Discuss and Demonstrate the correct tip placement of an Piezoelectric
ultrasonic scaler for both supra and subgingival use all around the
mouth

Answer 7

• flat: 30, 000 vibrations, lateral
• round
• diamond: be careful
• bladed: options
• implant= diff
• other: s series

Question 8

Discuss the difference between an effective and ineffective scaling tip
due to wear