INTRODUCTION
A recent development from the original ultrasonics ,is the use of
high-frequency, sonic, air-scalers with modified abrasive tips – a technique known
as ‘sono-abrasion’
The Sonicsys micro unit, designed by Drs Hugo, Unterbrink and
Mösele
Sono-abrasion is based upon the Sonicflex 2000L and 2000N air-scaler handpieces that oscillate in the sonic region (< 6.5 kHz)
WORKING PRINCIPLE
Sono abrasion technique is based on the removal of tooth material by an air-driven hand piece equipped with a diamond-coated working tip that removes tooth material by ultrasonic kinetic energy.
sono-abrasion has been introduced as an alternative for preparing minimally invasive cavities .
Sono abrasion technique was initially developed to prepare predetermined cavity outlines but also works well in removing hard tissue when finishing cavity preparation.
DIAMOND TIPS
Different sizes and shapes of diamond tips have been designed.
There are three different instrument tips:
lengthways halved torpedo shape (9.5 mm long, 1.3 mm wide),
small hemisphere (1.5 mm diameter) and
large hemisphere(2.2 mm).
As these tips are coated only on one side, additional damage and trauma of the approximal side of adjacent teeth is prevented.
The constricted shape of the tip enables easy access in small occlusal and approximal cavities.
Sono-abrasion can be used for beveling the cavity margins, thereby improving the marginal adaptation of a composite filling
