Sonic and ultrasonic movement.

The differences.

The Hertz.

One Hertz is equivalent to cycles per second. Applicated to a surgical tool, hertz measures how many times the device tip vibrates in a second.

Sonic Oscillation
6.000Hz.


Ultrasonic Oscillation
40.000Hz

Differences in the amplitude and frequency of the movement.

 

Sonic Frequency

from 20 Hz to 20000 Hz

from 20 to 20000 oscillation
per second.

Ultrasonic Frequency

from 20000 Hz to infinity

from 20000 to infinity
oscillation per second.

Movement
Sonosurgery=Sonic

Rotary Motion

 

Movement
Piezochirurgic=Ultrasonic

Longitudinal Motion

Video Movement Sono

Video Movement Piezo

Sonosurgery tip thickness

The Sonosurgery tips reach

a minimum size

of 0,25 mm.

Piezosurgical tip thickness.

The Piezosurgery tips

reach a minimum thickness

of 0,35 mm.

Sonosurgery Handpieces

The Sonosurgery inserts are assembled on any kind of air-driven handpiece such as used in periodontal scaling.

The movement is generated by air pressure.
 
They can be connected to the dentists chair.

Piezosurgical Handpieces

The Piezosurgery inserts are assembled on proper handpieces.

The movement is generated by mechanical compression of a crystal.

A proper device is necessary.

Sonic System.
Pneumatic Drive.

The sonic handpieces (air scaler) follow an indefinite direction, which is oriented by the friction.

Turns a rotary montion into a reciprocating motion

Three direction movements: longitudinal, transversal, vertical

Ablative action and/or cutting edge on each side

Pression on the handpiece > 2-N * slows the movement

Ultrasonic System.
Piezoelectric Drive.

The ultrasonic handpieces (piezoelectric devices) follow a linear, non-changeable direction (not friction-oriented).

Quartz disks contractions excited by electricity

Longitudinal motion along the axis of the handpiece

Alternative bidirectional tip movement

Speed does not depend on the pressure exerted on the handpiece

Osteotomy on a bone of porc rib ex vivo performed with piezosurgical and sonosurgical instruments.

 

 

Osteotomy
sonic

Magnification with microscope

Courtesy of Dott. Scipioni

Osteotomy
ultrasonic

Magnification with microscope

Courtesy of Dott. Scipioni

Osteotomia
sonica

Magnification with microscope

Courtesy of Dott. Scipioni

Osteotomia
ultrasonica

Magnification with microscope

Courtesy of Dott. Scipioni

The heat

The heat generated by the sonic handpiece system measures

1,54° - 2,29°

Experimental and histological investigations of the bone using two different oscillating osteotomy techniques compared with conventional rotary osteotomy.Heinemann, Hasan, Kunert-Kei, Götz, Gedrange, Spassov, Schweppe, Gredes.Ann Anat. 2012 Mar 20;194(2):165-70.

The heat

The heat generated by the piezo handpiece system measures

18,7°

Experimental and histological investigations of the bone using two different oscillating osteotomy techniques compared with conventional rotary osteotomy.Heinemann, Hasan, Kunert-Kei, Götz, Gedrange, Spassov, Schweppe, Gredes.Ann Anat. 2012 Mar 20;194(2):165-70.

Surgical access.

Orientation in three dimensions facilitates access.