The amplitude of vibration, due to the ultrasound, increases with the reduction of the cross section area of the material in which the ultrasound propagates. Therefore, finer tips vibrate more in the extremity and have a greater cutting ability.

This concept is exactly contrary to the usual one in rotary systems, where with the increase of the diameter it increases the tangential speed, increasing the cutting speed.

From the technical view point the truncated cone CVDentus tip is the one that better cuts. The finest truncated cone one (T0F), although it is to be used in low power, it cuts as efficiently as much thicker tips used at higher power.

The thickest truncated cone one (T1) is more robust and has a high cutting ability. It is the tip of choice for the most difficult works, as the initial opening of sound enamel.

Wedged tips (W1 and W1-O) have a conical shape but with a larger impact area. They are very efficient to remove larger volumes of material.

In the cut by vibration the tips suffer innumerable impacts (about 30.000 impacts per second). With spherical tips (R1), due to its format, these impacts tend to occur on a single point, which causes a tendency of premature fatigue of its surface at that point.

For this reason, from the technical viewpoint, it is better to prevent the use of the spherical tips in the opening of sound enamel or the removal of resistant old restorations. Preferably use spherical tips in dentine.

The inverted trunkated cone format (I1) was conceived to make mechanical micro-retentions in the base of the cavity and, also, it has been used successfully in the removal of old restorations.

The cylindrical tips are general purpose for the formatting of the cavity. The great freedom of movements and the complete visualization of the cavity during its execution, allow the formatting of the cavity without necessity of many different tip formats.

Other formats of tips are being developed and all suggestions are welcome in order to improve the product and to favor the performance of the professional.